Property:Phenology

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Abelmoschus esculentus +
Flowering spring–fall.  +
Abietinella abietina +
Capsules mature late summer.  +
Abildgaardia ovata +
Fruiting all year.  +
Abronia alpina +
Flowering summer.  +
Abronia ameliae +
Flowering winter–spring.  +
Abronia ammophila +
Flowering summer–fall.  +
Abronia angustifolia +
Flowering spring–fall.  +
Abronia argillosa +
Flowering spring–summer.  +
Abronia bigelovii +
Flowering fall.  +
Abronia bolackii +
Flowering spring–summer.  +
Abronia carletonii +
Flowering spring–fall.  +
Abronia elliptica +
Flowering spring–fall.  +
Abronia fragrans +
Flowering spring–fall.  +
Abronia latifolia +
Flowering spring–summer.  +
Abronia macrocarpa +
Flowering spring, opportunistically after summer rains.  +
Abronia maritima +
Flowering year-round.  +
Abronia mellifera +
Flowering spring–fall.  +
Abronia nana var. covillei +
Flowering spring–fall.  +
Abronia nana var. nana +
Flowering spring–fall.  +
Abronia pogonantha +
Flowering spring–summer.  +
Abronia turbinata +
Flowering spring–fall.  +
Abronia umbellata var. acutalata +
Flowering spring–fall.  +
Abronia umbellata var. breviflora +
Flowering year-round.  +
Abronia umbellata var. umbellata +
Flowering year-round.  +
Abronia villosa var. aurita +
Flowering year-round.  +
Abronia villosa var. villosa +
Flowering winter–summer.  +
Abutilon abutiloides +
Flowering year-round.  +
Abutilon berlandieri +
Flowering year-round.  +
Abutilon coahuilae +
Flowering year-round.  +
Abutilon fruticosum +
Flowering year-round.  +
Abutilon hirtum +
Flowering year-round.  +
Abutilon hulseanum +
Flowering winter–spring.  +
Abutilon hypoleucum +
Flowering spring–fall.  +
Abutilon incanum +
Flowering spring–fall.  +
Abutilon malacum +
Flowering summer.  +
Abutilon mollicomum +
Flowering late summer.  +
Abutilon palmeri +
Flowering late winter–spring.  +
Abutilon parishii +
Flowering late summer.  +
Abutilon parvulum +
Flowering spring–fall.  +
Abutilon permolle +
Flowering year-round.  +
Abutilon reventum +
Flowering late summer.  +
Abutilon theophrasti +
Flowering summer–fall.  +
Abutilon trisulcatum +
Flowering winter–spring.  +
Abutilon wrightii +
Flowering spring–fall.  +
Acaena novae-zelandiae +
Flowering May–Jun.  +
Acaena pallida +
Flowering May–Jun.  +
Acaena pinnatifida +
Flowering Mar–Jun.  +
Acalypha alopecuroidea +
Flowering and fruiting late summer–fall.  +
Acalypha arvensis +
Flowering and fruiting summer–fall.  +
Acalypha australis +
Flowering and fruiting late summer–fall.  +
Acalypha californica +
Flowering and fruiting year-round, especially spring and fall.  +
Acalypha chamaedrifolia +
Flowering and fruiting year-round, mainly spring–fall.  +
Acalypha deamii +
Flowering and fruiting late summer–fall.  +
Acalypha gracilens +
Flowering and fruiting mostly summer–fall.  +
Acalypha monococca +
Flowering and fruiting summer–fall.  +
Acalypha monostachya +
Flowering and fruiting spring–fall.  +
Acalypha neomexicana +
Flowering and fruiting late summer–fall.  +
Acalypha ostryifolia +
Flowering and fruiting summer–fall.  +
Acalypha phleoides +
Flowering and fruiting spring–fall.  +
Acalypha poiretii +
Flowering and fruiting late summer–fall.  +
Acalypha radians +
Flowering and fruiting spring–fall.  +
Acalypha rhomboidea +
Flowering and fruiting summer–fall.  +
Acalypha setosa +
Flowering and fruiting summer–fall.  +
Acalypha virginica +
Flowering and fruiting summer–fall.  +
Acalypha wilkesiana +
Flowering spring–fall.  +
Acamptopappus shockleyi +
Flowering Apr–Jun.  +
Acamptopappus sphaerocephalus var. hirtellus +
Flowering Apr–Jun.  +
Acamptopappus sphaerocephalus var. sphaerocephalus +
Flowering Mar–Jun.  +
Acanthocereus tetragonus +
Flowering mid summer–fall.  +
Acanthoscyphus parishii var. abramsii +
Flowering Jun–Aug.  +
Acanthoscyphus parishii var. cienegensis +
Flowering Jun–Sep.  +
Acanthoscyphus parishii var. goodmaniana +
Flowering May–Sep.  +
Acanthoscyphus parishii var. parishii +
Flowering Jun–Oct.  +
Acanthospermum australe +
Flowering year round, mostly Jul–Aug.  +
Acanthospermum hispidum +
Flowering year round, mostly Aug–Oct.  +
Acanthospermum humile +
Flowering all year.  +
Acaulon muticum var. muticum +
Capsules mature late fall to spring.  +
Acaulon muticum var. rufescens +
Capsules mature late fall to early spring.  +
Acaulon schimperianum +
Capsules mature winter.  +
Acaulon triquetrum +
Capsules mature late autumn-spring.  +
Achillea alpina +
Flowering early Jul–early Sep.  +
Achillea millefolium +
Flowering late Apr–early Jul (south), mid Jul–mid Sep (north).  +
Achillea nobilis +
Flowering mid Jul–early Sep.  +
Achillea ptarmica +
Flowering late Jun–mid Sep.  +
Achlys californica +
Flowering spring–summer (Apr–Jul).  +
Achlys triphylla +
Flowering spring–summer (Apr–Jul).  +
Achyrachaena mollis +
Flowering Mar–Jun.  +
Achyranthes aspera var. aspera +
Flowering summer.  +
Achyranthes aspera var. pubescens +
Flowering summer.  +
Achyranthes japonica +
Flowering summer.  +
Achyronychia cooperi +
Flowering spring.  +
Acleisanthes acutifolia +
Flowering spring–fall.  +
Acleisanthes angustifolia +
Flowering late spring–early fall.  +
Acleisanthes anisophylla +
Flowering spring–fall.  +
Acleisanthes chenopodioides +
Flowering late spring–early fall.  +
Acleisanthes crassifolia +
Flowering spring–fall.  +
Acleisanthes diffusa +
Flowering late spring–late summer.  +
Acleisanthes lanceolata var. lanceolata +
Flowering late spring–early fall.  +
Acleisanthes longiflora +
Flowering Feb–Nov.  +
Acleisanthes nevadensis +
Flowering spring–summer.  +
Acleisanthes obtusa +
Flowering early spring–late fall.  +
Acleisanthes parvifolia +
Flowering late spring–early fall.  +
Acleisanthes wrightii +
Flowering spring–fall.  +
Acmella pusilla +
Flowering May–Sep.  +
Acmella repens +
Flowering Jan–Dec.  +
Acoelorraphe wrightii +
Flowering spring–summer.  +
Aconitum columbianum subsp. columbianum +
Flowering summer (Jul–Sep).  +
Aconitum columbianum subsp. viviparum +
Flowering summer (Jul–Sep).  +
Aconitum delphiniifolium +
Flowering summer (mid Jun–Sep).  +
Aconitum maximum subsp. maximum +
Flowering summer (mid Jul–Sep).  +
Aconitum reclinatum +
Flowering late spring–summer (Jun–Sep).  +
Aconitum uncinatum +
Flowering late summer (mid Aug-late Sep).  +
Aconogonon alaskanum var. alaskanum +
Flowering Jun–Aug.  +
Aconogonon alaskanum var. glabrescens +
Flowering Jun–Aug.  +
Aconogonon davisiae var. davisiae +
Flowering Jun–Aug.  +
Aconogonon davisiae var. glabrum +
Flowering Jun–Aug.  +
Aconogonon phytolaccifolium var. glabrum +
Flowering Jun–Aug.  +
Aconogonon phytolaccifolium var. phytolaccifolium +
Flowering Jun–Aug.  +
Acorus americanus +
Flowering late spring–mid summer.  +
Acorus calamus +
Flowering early spring–early summer.  +
Acourtia microcephala +
Flowering May–Jul.  +
Acourtia nana +
Flowering (Mar–)Apr(–Jun).  +
Acourtia runcinata +
Flowering year round (mostly Mar–Aug).  +
Acourtia thurberi +
Flowering Oct–Nov.  +
Acourtia wrightii +
Flowering Jun–Nov.  +
Acrocomia totai +
Flowering in the summer.  +
Acroporium smallii +
Capsules mature summer.  +
Acroptilon repens +
Flowering late spring–summer (May–Sep).  +
Acrostichum aureum +
Sporulating all year.  +
Actaea pachypoda +
Flowering spring–early summer.  +
Actaea rubra +
Flowering spring–early summer.  +
Adelia vaseyi +
Flowering Jan–Jun, fruiting Jun.  +
Adenocaulon bicolor +
Flowering Jun–Oct.  +
Adenophyllum cooperi +
Flowering spring–fall.  +
Adenophyllum porophylloides +
Flowering spring and fall.  +
Adenophyllum wrightii var. wrightii +
Flowering fall.  +
Adenostoma fasciculatum var. fasciculatum +
Flowering (Apr–)May–Jun(–Aug).  +
Adenostoma fasciculatum var. obtusifolium +
Flowering (Apr–)May–Jun(–Aug).  +
Adenostoma fasciculatum var. prostratum +
Flowering (Apr–)May–Jun(–Aug).  +
Adenostoma sparsifolium +
Flowering Jul–Aug(–Sep).  +
Adiantum aleuticum +
Sporulating summer–fall.  +
Adiantum capillus-veneris +
Sporulating spring–summer.  +
Adiantum hispidulum +
Sporulating summer–fall.  +
Adiantum jordanii +
Sporulating early spring–midsummer.  +
Adiantum melanoleucum +
Sporulating throughout the year.  +
Adiantum pedatum +
Sporulating summer–fall.  +
Adiantum tenerum +
Sporulating throughout the year.  +
Adiantum tricholepis +
Sporulating late winter–early spring.  +
Adiantum viridimontanum +
Sporulating summer–fall.  +
Adlumia fungosa +
Flowering summer–early fall.  +
Adolphia californica +
Flowering Dec–Apr(–May).  +
Adolphia infesta +
Flowering Mar–Aug(–Sep).  +
Adonis aestivalis +
Flowering spring–summer (May–Jul).  +
Adonis annua +
Flowering spring–summer (Apr–Jun).  +
Adonis vernalis +
Flowering spring (Apr–May).  +
Aeonium arboreum var. arboreum +
Flowering spring.  +
Aeonium haworthii +
Flowering late spring.  +
Agalinis aphylla +
Flowering early Sep–mid Oct.  +
Agalinis aspera +
Flowering Jul–Sep.  +
Agalinis auriculata +
Flowering Aug–Sep.  +
Agalinis caddoensis +
Flowering Oct.  +
Agalinis calycina +
Flowering Aug–Sep.  +
Agalinis decemloba +
Flowering Aug–mid Oct.  +
Agalinis densiflora +
Flowering Aug–Sep.  +
Agalinis divaricata +
Flowering early Sep–mid Oct.  +
Agalinis edwardsiana +
Flowering Aug–Oct.  +
Agalinis fasciculata +
Flowering year-round.  +
Agalinis filicaulis +
Flowering mid Sep–early Nov.  +
Agalinis filifolia +
Flowering Jun–Nov.  +
Agalinis flexicaulis +
Flowering Sep–late Oct.  +
Agalinis gattingeri +
Flowering mid Aug–Oct.  +
Agalinis georgiana +
Flowering late Aug–late Sep(–Oct).  +
Agalinis harperi +
Flowering late Sep–Oct.  +
Agalinis heterophylla +
Flowering late Aug–early Oct.  +
Agalinis homalantha +
Flowering late Aug–early Oct.  +
Agalinis laxa +
Flowering Sep–Oct.  +
Agalinis linifolia +
Flowering late Aug–early Oct.  +
Agalinis maritima var. grandiflora +
Flowering year-round.  +
Agalinis maritima var. maritima +
Flowering Jul–Sep.  +
Agalinis navasotensis +
Flowering Sep–Oct.  +
Agalinis neoscotica +
Flowering late Jul–early Sep.  +
Agalinis obtusifolia +
Flowering Sep–late Oct.  +
Agalinis oligophylla +
Flowering late Sep–mid Nov.  +
Agalinis plukenetii +
Flowering late Sep–early Nov.  +
Agalinis pulchella +
Flowering Sep–early Oct.  +
Agalinis purpurea var. parviflora +
Flowering Jul–Sep.  +
Agalinis purpurea var. purpurea +
Flowering Aug–Oct.  +
Agalinis setacea +
Flowering Aug–Oct.  +
Agalinis skinneriana +
Flowering Aug–early Oct.  +
Agalinis strictifolia +
Flowering mid Jul–Oct.  +
Agalinis tenella +
Flowering Sep–Oct.  +
Agalinis tenuifolia +
Flowering (late Jul–)Aug–Nov.  +
Agalinis viridis +
Flowering late Aug–Oct.  +
Agarista populifolia +
Flowering early spring–spring.  +
Agave americana subsp. protamericana +
Flowering early spring–early summer.  +
Agave americana var. americana +
Flowering mid spring–early summer.  +
Agave americana var. expansa +
Flowering late spring–early summer.  +
Agave asperrima var. asperrima +
Flowering late spring–summer.  +
Agave chrysantha +
Flowering late spring–summer.  +
Agave decipiens +
Flowering mid fall–early winter.  +
Agave delamateri +
Flowering early summer.  +
Agave deserti var. deserti +
Flowering spring.  +
Agave deserti var. simplex +
Flowering spring.  +
Agave desmettiana +
Flowering late spring–early summer.  +
Agave gracilipes +
Flowering summer–early fall.  +
Agave havardiana +
Flowering summer–early fall.  +
Agave lechuguilla +
Flowering mid spring–late summer.  +
Agave mckelveyana +
Flowering mid spring–mid summer.  +
Agave murpheyi +
Flowering late winter–spring.  +
Agave neglecta +
Flowering early summer.  +
Agave palmeri +
Flowering late spring–summer.  +
Agave parryi subsp. neomexicana +
Flowering mid spring–early summer.  +
Agave parryi var. couesii +
Flowering late spring–early summer.  +
Agave parryi var. huachucensis +
Flowering mid spring–early summer.  +
Agave parryi var. parryi +
Flowering mid spring–mid summer.  +
Agave parviflora subsp. parviflora +
Flowering late spring–late summer.  +
Agave phillipsiana +
Flowering early summer.  +
Agave schottii var. schottii +
Flowering late spring–late summer.  +
Agave schottii var. treleasei +
Flowering late spring–summer.  +
Agave shawii var. shawii +
Flowering winter–mid spring.  +
Agave sisalana +
Flowering winter–early spring.  +
Agave toumeyana var. bella +
Flowering late spring.  +
Agave toumeyana var. toumeyana +
Flowering late spring–summer.  +
Agave univittata +
Flowering spring.  +
Agave utahensis subsp. kaibabensis +
Flowering mid spring–early summer.  +
Agave utahensis var. eborispina +
Flowering late winter–spring.  +
Agave utahensis var. nevadensis +
Flowering late winter–early summer  +
Agave utahensis var. utahensis +
Flowering late winter–early summer.  +
Agave weberi +
Flowering late spring–early summer.  +
Agave ×ajoensis +
Flowering late spring–summer.  +
Agave ×arizonica +
Flowering mid spring–early summer.  +
Agave ×glomeruliflora +
Flowering mid spring–early fall.  +
Agdestis clematidea +
Flowering summer–fall.  +
Ageratina adenophora +
Flowering Mar–Aug(–Sep).  +
Ageratina altissima var. altissima +
Flowering Jul–Oct(–Nov).  +
Ageratina altissima var. roanensis +
Flowering Jul–Oct.  +
Ageratina aromatica +
Flowering late Aug–Oct(–Nov).  +
Ageratina havanensis +
Flowering mainly (Sep–)Oct–Nov(–Dec), also Apr–Jul.  +
Ageratina herbacea +
Flowering (Jul–)Aug–Oct.  +
Ageratina jucunda +
Flowering (Sep–)Oct–Dec(–Jan).  +
Ageratina lemmonii +
Flowering Aug–Oct.  +
Ageratina luciae-brauniae +
Flowering Aug–Oct.  +
Ageratina occidentalis +
Flowering (Jun–)Jul–Sep.  +
Ageratina paupercula +
Flowering Mar–May.  +
Ageratina rothrockii +
Flowering (Jul–)Aug–Oct.  +
Ageratina shastensis +
Flowering Jun–Oct.  +
Ageratina thyrsiflora +
Flowering Sep–Nov.  +
Ageratina wrightii +
Flowering (Jul–)Aug–Oct(–Nov).  +
Ageratum conyzoides +
Flowering Jul–Aug.  +
Ageratum corymbosum +
Flowering Jul–Oct.  +
Ageratum houstonianum +
Flowering Jun–Aug.  +
Ageratum maritimum +
Flowering year round.  +
Agnorhiza bolanderi +
Flowering Mar–Apr(–May).  +
Agnorhiza elata +
Flowering Jun–Jul(–Aug).  +
Agnorhiza invenusta +
Flowering Jun–Jul.  +
Agnorhiza ovata +
Flowering May–Jul(–Aug).  +
Agnorhiza reticulata +
Flowering May–Jun.  +
Agoseris apargioides var. apargioides +
Flowering Apr–May (year-round).  +
Agoseris apargioides var. eastwoodiae +
Flowering April–May (year-round).  +
Agoseris apargioides var. maritima +
Flowering Jul–Aug.  +
Agoseris aurantiaca var. aurantiaca +
Flowering Jun–Sep.  +
Agoseris aurantiaca var. purpurea +
Flowering Jun–Sep.  +
Agoseris glauca var. dasycephala +
Flowering Jul–Aug.  +
Agoseris glauca var. glauca +
Flowering May–Sep.  +
Agoseris grandiflora var. grandiflora +
Flowering Mar–Oct.  +
Agoseris grandiflora var. leptophylla +
Flowering Mar–Oct.  +
Agoseris heterophylla var. cryptopleura +
Flowering Mar–Sep.  +
Agoseris heterophylla var. heterophylla +
Flowering Mar–Sep.  +
Agoseris heterophylla var. quentinii +
Flowering Mar–Jun.  +
Agoseris hirsuta +
Flowering mostly Apr–Jun, rarely Sep–Dec.  +
Agoseris monticola +
Flowering Jul–Aug.  +
Agoseris parviflora +
Flowering Apr–Aug.  +
Agoseris retrorsa +
Flowering Apr–Aug.  +
Agoseris ×elata +
Flowering Jun–Sep.  +
Agrimonia gryposepala +
Flowering Jul–mid Aug[–Mar].  +
Agrimonia incisa +
Flowering late Jul–Nov.  +
Agrimonia microcarpa +
Flowering late Jul–Sep.  +
Agrimonia parviflora +
Flowering mid Jul–early Sep.  +
Agrimonia pubescens +
Flowering mid Jul–Sep.  +
Agrimonia rostellata +
Flowering Jul–mid Sep.  +
Agrimonia striata +
Flowering late Jun–Aug(–mid Sep).  +
Agrostemma githago var. githago +
Flowering spring–summer.  +
Akebia quinata +
Flowering spring, fruiting fall (Sep–Oct).  +
Alcea rosea +
Flowering May–Oct  +, fruiting Jun–Oct.  +
Alcea rugosa +
Flowering May–Oct  +, fruiting Jun–Oct.  +
Alchemilla alpina +
Flowering mid Jun–mid Sep.  +
Alchemilla filicaulis subsp. filicaulis +
Flowering late Jun–Sep.  +
Alchemilla filicaulis subsp. vestita +
Flowering late Jun–Aug.  +
Alchemilla glabra +
Flowering Jul–Aug.  +
Alchemilla glaucescens +
Flowering Jun–Aug.  +
Alchemilla glomerulans +
Flowering late Jun–Sep.  +
Alchemilla micans +
Flowering late May–Sep.  +
Alchemilla mollis +
Flowering late Jul–Sep.  +
Alchemilla monticola +
Flowering late May–Sep.  +
Alchemilla subcrenata +
Flowering Jun–Sep.  +
Alchemilla venosa +
Flowering late Jun–Aug.  +
Alchemilla wichurae +
Flowering Jul.  +
Alchemilla xanthochlora +
Flowering late May–Sep.  +
Aletris aurea +
Flowering late spring–mid summer.  +
Aletris bracteata +
Flowering year round.  +
Aletris farinosa +
Flowering late spring–mid summer.  +
Aletris lutea +
Flowering spring.  +
Aletris obovata +
Flowering late spring–mid summer.  +
Alisma gramineum +
Flowering summer–fall.  +
Alisma lanceolatum +
Flowering and fruiting summer–fall.  +
Alisma plantago-aquatica +
Flowering and fruiting late summer.  +
Alisma subcordatum +
Flowering spring–fall.  +
Alisma triviale +
Flowering spring–fall.  +
Allenrolfea occidentalis +
Flowering mid summer–late fall.  +
Alliaria petiolata +
Flowering Apr–May.  +
Allionia choisyi +
Flowering late spring–early fall [year-round].  +
Allionia incarnata var. incarnata +
Flowering year-round, primarily early spring–late fall.  +
Allionia incarnata var. villosa +
Flowering early spring–late fall [year-round].  +
Allium aaseae +
Flowering Apr–May.  +
Allium abramsii +
Flowering May–Jul.  +
Allium acuminatum +
Flowering Apr–Jul.  +
Allium ampeloprasum +
Flowering Apr–Jul.  +
Allium amplectens +
Flowering Apr–Jul.  +
Allium anceps +
Flowering Apr–May.  +
Allium atrorubens var. atrorubens +
Flowering May–Jun.  +
Allium atrorubens var. cristatum +
Flowering late Apr–Jun.  +
Allium bigelovii +
Flowering late Mar–May.  +
Allium bisceptrum +
Flowering May–Jul.  +
Allium bolanderi var. bolanderi +
Flowering late May–early Aug.  +
Allium bolanderi var. mirabile +
Flowering late May–early Jul.  +
Allium brandegeei +
Flowering late Apr–Jul.  +
Allium brevistylum +
Flowering Jun–Aug.  +
Allium burlewii +
Flowering late Apr–Jul.  +
Allium campanulatum +
Flowering late May–Aug.  +
Allium canadense var. canadense +
Flowering Apr–Jul.  +
Allium canadense var. ecristatum +
Flowering Mar–early Apr.  +
Allium canadense var. fraseri +
Flowering Apr–Jun.  +
Allium canadense var. hyacinthoides +
Flowering late Mar–Apr.  +
Allium canadense var. lavendulare +
Flowering May–Jul.  +
Allium canadense var. mobilense +
Flowering Apr–May.  +
Allium cepa +
Flowering Jun–Aug.  +
Allium cernuum +
Flowering Jul–Oct.  +
Allium columbianum +
Flowering May–Jul.  +
Allium constrictum +
Flowering May–Jul.  +
Allium coryi +
Flowering Apr–May.  +
Allium cratericola +
Flowering Mar–Jun.  +
Allium crenulatum +
Flowering late May–Jul.  +
Allium crispum +
Flowering late Mar–Jun.  +
Allium cuthbertii +
Flowering May–early Jun.  +
Allium denticulatum +
Flowering mid Apr–mid Jul.  +
Allium diabolense +
Flowering mid Apr–Jun.  +
Allium dichlamydeum +
Flowering May–Jul.  +
Allium dictuon +
Flowering Jun–Jul.  +
Allium douglasii +
Flowering May–Jul.  +
Allium drummondii +
Flowering Mar–Jun.  +
Allium elmendorfii +
Flowering Mar–early Apr.  +
Allium falcifolium +
Flowering Apr–Jun.  +
Allium fibrillum +
Flowering May–Jul.  +
Allium fimbriatum var. fimbriatum +
Flowering Apr–Jun.  +
Allium fimbriatum var. mohavense +
Flowering Apr–May.  +
Allium fimbriatum var. purdyi +
Flowering late Apr–Jun.  +
Allium fistulosum +
Flowering Jul–Aug.  +
Allium geyeri var. geyeri +
Flowering May–Sep.  +
Allium geyeri var. tenerum +
Flowering May–Sep.  +
Allium gooddingii +
Flowering Jun–Sep.  +
Allium haematochiton +
Flowering Mar–May.  +
Allium hickmanii +
Flowering Mar–May.  +
Allium hoffmanii +
Flowering Jun–Jul.  +
Allium howellii var. clokeyi +
Flowering May–Jun.  +
Allium howellii var. howellii +
Flowering Mar–Apr.  +
Allium howellii var. sanbenitense +
Flowering Apr–May.  +
Allium hyalinum +
Flowering Mar–May.  +
Allium jepsonii +
Flowering late May–early Jul.  +
Allium kunthii +
Flowering Jul–Sep.  +
Allium lacunosum var. davisiae +
Flowering Apr–May.  +
Allium lacunosum var. kernensis +
Flowering Apr–May.  +
Allium lacunosum var. lacunosum +
Flowering Apr–Jun.  +
Allium lacunosum var. micranthum +
Flowering Apr–Jun.  +
Allium lemmonii +
Flowering May–Jun.  +
Allium macropetalum +
Flowering late Mar–Jun.  +
Allium macrum +
Flowering Apr–May.  +
Allium madidum +
Flowering May–Jul.  +
Allium membranaceum +
Flowering May–Jun.  +
Allium monticola +
Flowering late May–Jul.  +
Allium munzii +
Flowering Apr–mid May.  +
Allium neapolitanum +
Flowering Mar–Apr.  +
Allium nevadense +
Flowering Apr–Jun.  +
Allium nevii +
Flowering May–Jul.  +
Allium nigrum +
Flowering Jun.  +
Allium obtusum var. conspicuum +
Flowering May–Jun.  +
Allium obtusum var. obtusum +
Flowering May–Jun.  +
Allium oleraceum +
Flowering late Jul–Aug.  +
Allium paniculatum var. paniculatum +
Flowering Jun–Jul.  +
Allium parishii +
Flowering Apr–May.  +
Allium parryi +
Flowering May–Jul.  +
Allium parvum +
Flowering late Apr–Jun.  +
Allium passeyi +
Flowering Jun.  +
Allium peninsulare var. franciscanum +
Flowering May–Jun.  +
Allium peninsulare var. peninsulare +
Flowering Apr–May.  +
Allium perdulce var. perdulce +
Flowering Apr–Jun.  +
Allium perdulce var. sperryi +
Flowering Mar–Apr.  +
Allium platycaule +
Flowering May–Jun.  +
Allium plummerae +
Flowering Jun–Sep.  +
Allium praecox +
Flowering Mar–May.  +
Allium punctum +
Flowering May–Jun.  +
Allium rhizomatum +
Flowering Jul–Sep.  +
Allium robinsonii +
Flowering Apr–May.  +
Allium rotundum +
Flowering May–Jul.  +
Allium runyonii +
Flowering Mar–Apr.  +
Allium sanbornii var. congdonii +
Flowering Jun–Jul.  +
Allium sanbornii var. sanbornii +
Flowering late Jun–Aug.  +
Allium sativum var. sativum +
Flowering Jun–Jul.  +
Allium schoenoprasum +
Flowering Jun–Aug.  +
Allium scilloides +
Flowering Mar–Apr.  +
Allium serra +
Flowering Apr–May.  +
Allium sharsmithiae +
Flowering Apr–May.  +
Allium shevockii +
Flowering Jun–Jul.  +
Allium simillimum +
Flowering Apr–Jun.  +
Allium siskiyouense +
Flowering late Apr–Jun.  +
Allium speculae +
Flowering Jun.  +
Allium stellatum +
Flowering Jul–Oct.  +
Allium textile +
Flowering May–Jun.  +
Allium tolmiei var. persimile +
Flowering Apr–Jul.  +
Allium tolmiei var. tolmiei +
Flowering Apr–Jul.  +
Allium tribracteatum +
Flowering Mar–May.  +
Allium tricoccum var. burdickii +
Flowering early Jun.  +
Allium tricoccum var. tricoccum +
Flowering Jul–Aug.  +
Allium triquetrum +
Flowering Mar–Apr.  +
Allium tuberosum +
Flowering Jul–Aug.  +
Allium tuolumnense +
Flowering Mar–May.  +
Allium unifolium +
Flowering May–Jun.  +
Allium validum +
Flowering Jun–Aug.  +
Allium victorialis +
Flowering Jul–Aug.  +
Allium vineale +
Flowering Jun–Aug.  +
Allium yosemitense +
Flowering May–Jun.  +
Allotropa virgata +
Flowering late spring–summer.  +
Allowissadula holosericea +
Flowering May–Nov.  +
Allowissadula lozanoi +
Flowering May–Oct.  +
Almutaster pauciflorus +
Flowering spring–fall.  +
Alnus alnobetula subsp. crispa +
Flowering spring.  +
Alnus alnobetula subsp. fruticosa +
Flowering spring.  +
Alnus alnobetula subsp. sinuata +
Flowering spring.  +
Alnus glutinosa +
Flowering early spring.  +
Alnus incana subsp. rugosa +
Flowering early spring.  +
Alnus incana subsp. tenuifolia +
Flowering early spring.  +
Alnus maritima +
Flowering late summer–early fall.  +
Alnus oblongifolia +
Flowering early spring.  +
Alnus rhombifolia +
Flowering early spring.  +
Alnus rubra +
Flowering early spring.  +
Alnus serrulata +
Flowering early spring.  +
Aloe vera +
Flowering spring–winter, occasionally at other times.  +
Aloe ×schonlandii +
Flowering spring.  +
Aloina aloides var. ambigua +
Capsules mature Jan–May.  +
Aloina bifrons +
Capsules mature Jan–Jul(-Aug).  +
Aloina brevirostris +
Capsules mature (Mar-)May–Aug.  +
Aloina hamulus +
Sporophytes unknown in flora area.  +
Aloina rigida var. rigida +
Capsules mature Jun–Aug(-Oct).  +
Alophia drummondii +
Flowering mostly May–Jul(–Sep).  +
Alpinia zerumbet +
Flowering spring–summer (May–Sep).  +
Alsia californica +
Capsules mature spring.  +
Alstroemeria pulchella +
Flowering mid spring–early summer.  +
Alternanthera brasiliana +
Flowering spring.  +
Alternanthera caracasana +
Flowering summer–fall.  +
Alternanthera ficoidea var. bettzickiana +
Flowering late winter.  +
Alternanthera flavescens +
Flowering year-round.  +
Alternanthera maritima +
Flowering winter–spring.  +
Alternanthera paronychioides +
Flowering spring–late fall, year-round in far south.  +
Alternanthera philoxeroides +
Flowering early spring–summer.  +
Alternanthera pungens +
Flowering summer–fall.  +
Alternanthera sessilis +
Flowering summer–early fall.  +
Althaea armeniaca +
Flowering summer–fall.  +
Althaea cannabina +
Flowering summer.  +
Althaea hirsuta +
Flowering spring–summer.  +
Althaea officinalis +
Flowering summer–fall.  +
Alvaradoa amorphoides subsp. psilophylla +
Flowering and fruiting year-round.  +
Alyssum alyssoides +
Flowering May–Jul.  +
Alyssum desertorum +
Flowering Apr–Jul.  +
Alyssum murale +
Flowering May–Jul.  +
Alyssum obovatum +
Flowering May–Jul.  +
Alyssum simplex +
Flowering Apr–Jun.  +
Alyssum szowitsianum +
Flowering May.  +
Amaranthus acanthochiton +
Flowering summer–fall.  +
Amaranthus albus +
Flowering summer–fall.  +
Amaranthus arenicola +
Flowering summer–fall.  +
Amaranthus australis +
Flowering summer–fall.  +
Amaranthus blitoides +
Flowering summer–fall.  +
Amaranthus blitum +
Flowering summer–fall (almost year-round in tropics, subtropics).  +
Amaranthus californicus +
Flowering summer–fall.  +
Amaranthus cannabinus +
Flowering summer–fall.  +
Amaranthus caudatus +
Flowering summer–fall.  +
Amaranthus crassipes +
Flowering summer and fall.  +
Amaranthus crispus +
Flowering summer–fall.  +
Amaranthus cruentus +
Flowering summer–fall.  +
Amaranthus deflexus +
Flowering summer–fall.  +
Amaranthus dubius +
Flowering summer–fall in tropics, various seasons in subtropics.  +
Amaranthus fimbriatus +
Flowering summer–fall (in arid regions mostly after summer rains).  +
Amaranthus floridanus +
Flowering late spring–fall.  +
Amaranthus graecizans +
Flowering summer–fall.  +
Amaranthus greggii +
Flowering summer–fall.  +
Amaranthus hybridus +
Flowering summer–fall.  +
Amaranthus hypochondriacus +
Flowering summer–fall.  +
Amaranthus muricatus +
Flowering summer–fall.  +
Amaranthus obcordatus +
Flowering summer–fall.  +
Amaranthus palmeri +
Flowering summer–fall, occasionally spring–winter in southern part of its native range.  +
Amaranthus polygonoides +
Flowering summer–fall.  +