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- Vitis subg. Muscadinia (2 members)
- Croton lindheimerianus (2 members)
- Euphorbia ocellata (2 members)
- Ceanothus megacarpus (2 members)
- Linum medium (2 members)
- Putranjivaceae (2 members)
- Drypetes (2 members)
- Croton alabamensis (2 members)
- Parnassia cirrata (2 members)
- Euphorbia serpillifolia (2 members)
- Euphorbia austrotexana (2 members)
- Ceanothus velutinus (2 members)
- Schoepfiaceae (2 members)
- Phyllanthus abnormis (2 members)
- Linum floridanum (2 members)
- Linum berlandieri (2 members)
- Paxistima (2 members)
- Ximenia (2 members)
- Viscum (2 members)
- Crossopetalum (2 members)
- Fendlera (2 members)
- Phyllanthopsis (2 members)
- Ceanothus impressus (2 members)
- Cornus subg. Cornus (2 members)
- Adolphia (2 members)
- Mentzelia humilis (2 members)
- Celastrus (2 members)
- Euphorbia sect. Crepidaria (2 members)
- Flueggea (2 members)
- Euphorbia chaetocalyx (2 members)
- Linum carteri (2 members)
- Phoradendron villosum (2 members)
- Chrysobalanus (2 members)
- Ceanothus crassifolius (2 members)
- Croton pottsii (2 members)
- Euphorbia geyeri (2 members)
- Petalonyx thurberi (2 members)
- Ceanothus jepsonii (2 members)
- Tribulus (2 members)
- Eucnide bartonioides (2 members)
- Vitis rotundifolia (2 members)
- Guaiacum (2 members)
- Cirsium hydrophilum (2 members)
- Cirsium douglasii (2 members)
- Cirsium inamoenum (2 members)
- Cirsium cymosum (2 members)
- Plectocephalus (2 members)
- Arctotis (2 members)
- Scolymus (2 members)
- Carlina (2 members)
- Sonchus arvensis (2 members)
- Cynara (2 members)
- Cynara cardunculus (2 members)
- Leontodon saxatilis (2 members)
- Picris (2 members)
- Scorzonera (2 members)
- Calycoseris (2 members)
- Agoseris glauca (2 members)
- Agoseris aurantiaca (2 members)
- Agoseris grandiflora (2 members)
- Stebbinsoseris (2 members)
- Rafinesquia (2 members)
- Stephanomeria virgata (2 members)
- Glyptopleura (2 members)
- Krigia cespitosa (2 members)
- Pinaropappus (2 members)
- Dimorphotheca (2 members)
- Calendula (2 members)
- Osteospermum (2 members)
- Antennaria luzuloides (2 members)
- Antennaria pulcherrima (2 members)
- Antennaria parlinii (2 members)
- Cirsium pumilum (2 members)
- Antennaria monocephala (2 members)
- Micropus californicus (2 members)
- Psilocarphus brevissimus (2 members)
- Diaperia verna (2 members)
- Diaperia prolifera (2 members)
- Ancistrocarphus (2 members)
- Hesperevax sparsiflora (2 members)
- Pterocaulon (2 members)
- Pluchea odorata (2 members)
- Cirsium ochrocentrum (2 members)
- Chamaemelum (2 members)
- Sphaeromeria potentilloides (2 members)
- Artemisia borealis (2 members)
- Cirsium pulcherrimum (2 members)
- Artemisia tripartita (2 members)
- Artemisia globularia (2 members)
- Artemisia laciniata (2 members)
- Arctanthemum (2 members)
- Arctanthemum arcticum (2 members)
- Anthemis (2 members)
- Cotula (2 members)
- Tripleurospermum maritimum (2 members)
- Glebionis (2 members)
- Hazardia whitneyi (2 members)
- Lessingia pectinata (2 members)
- Lessingia micradenia (2 members)
- Symphyotrichum tenuifolium (2 members)
- Symphyotrichum concolor (2 members)
- Symphyotrichum ericoides (2 members)
- Symphyotrichum falcatum (2 members)
- Symphyotrichum drummondii (2 members)
- Symphyotrichum pilosum (2 members)
- Symphyotrichum ontarionis (2 members)
- Symphyotrichum puniceum (2 members)
- Symphyotrichum subg. Ascendentes (2 members)
- Senecio bigelovii (2 members)
- Senecio amplectens (2 members)
- Ericameria palmeri (2 members)
- Senecio serra (2 members)
- Packera bolanderi (2 members)
- Packera eurycephala (2 members)
- Packera subnuda (2 members)
- Erechtites hieraciifolius (2 members)
- Emilia (2 members)
- Hasteola (2 members)
- Luina (2 members)
- Tetradymia axillaris (2 members)
- Petasites (2 members)
- Blennosperma nanum (2 members)
- Amphiachyris (2 members)
- Gutierrezia texana (2 members)
- Bigelowia nudata (2 members)
- Baccharis pilularis (2 members)
- Sericocarpus oregonensis (2 members)
- Baccharis plummerae (2 members)
- Solidago puberula (2 members)
- Solidago caesia (2 members)
- Solidago curtisii (2 members)
- Solidago arguta subsp. arguta (2 members)
- Solidago arguta subsp. caroliniana (2 members)
- Solidago patula (2 members)
- Solidago sempervirens (2 members)
- Solidago stricta (2 members)
- Solidago ulmifolia (2 members)
- Solidago rugosa subsp. rugosa (2 members)
- Solidago (sect. Solidago) ser. Odorae (2 members)
- Solidago odora (2 members)
- Solidago canadensis (2 members)
- Solidago altissima (2 members)
- Solidago nemoralis (2 members)
- Solidago velutina (2 members)
- Nestotus (2 members)
- Petradoria (2 members)
- Petradoria pumila (2 members)
- Stenotus armerioides (2 members)
- Stenotus lanuginosus (2 members)
- Acamptopappus sphaerocephalus (2 members)
- Amphipappus (2 members)
- Amphipappus fremontii (2 members)
- Chaetopappa asteroides (2 members)
- Monoptilon (2 members)
- Bradburia (2 members)
- Chrysopsis linearifolia (2 members)
- Pityopsis aspera (2 members)
- Eucephalus ledophyllus (2 members)
- Heterotheca subaxillaris (2 members)
- Heterotheca stenophylla (2 members)
- Heterotheca camporum (2 members)
- Erigeron lassenianus (2 members)
- Doellingeria umbellata (2 members)
- Erigeron pumilus (2 members)
- Erigeron aphanactis (2 members)
- Erigeron clokeyi (2 members)
- Erigeron bloomeri (2 members)
- Pentachaeta exilis (2 members)
- Erigeron uncialis (2 members)
- Erigeron reductus (2 members)
- Erigeron peregrinus (2 members)
- Erigeron glacialis (2 members)
- Erigeron glabellus (2 members)
- Erigeron formosissimus (2 members)
- Erigeron sionis (2 members)
- Aphanostephus ramosissimus (2 members)
- Boltonia diffusa (2 members)
- Chloracantha (2 members)
- Herrickia kingii (2 members)
- Herrickia glauca (2 members)
- Xanthisma sect. Xanthisma (2 members)
- Xanthisma grindelioides (2 members)
- Machaeranthera (2 members)
- Xylorhiza tortifolia (2 members)
- Oönopsis foliosa (2 members)
- Pyrrocoma clementis (2 members)
- Pyrrocoma crocea (2 members)
- Pyrrocoma lanceolata (2 members)
- Pyrrocoma uniflora (2 members)
- Chaenactis carphoclinia (2 members)
- Chaenactis douglasii (2 members)
- Helenium amarum (2 members)
- Helenium elegans (2 members)
- Helenium microcephalum (2 members)
- Hymenoxys richardsonii (2 members)
- Tetraneuris linearifolia (2 members)
- Tetraneuris scaposa (2 members)
- Asteraceae (tribe Heliantheae) subtribe Marshalliinae (2 members)
- Eupatorium hyssopifolium (2 members)
- Eupatorium leucolepis (2 members)
- Rudbeckia grandiflora (2 members)
- Eutrochium purpureum (2 members)
- Conoclinium betonicifolium (2 members)
- Trichocoronis (2 members)
- Isocarpha (2 members)
- Brickellia coulteri (2 members)
- Brickellia hinckleyi (2 members)
- Brickellia lemmonii (2 members)
- Brickellia longifolia (2 members)
- Brickellia microphylla (2 members)
- Brickellia oblongifolia (2 members)
- Liatris squarrosa (2 members)
- Liatris spicata (2 members)
- Liatris pycnostachya (2 members)
- Liatris pauciflora (2 members)
- Carphephorus odoratissimus (2 members)
- Ratibida peduncularis (2 members)
- Fleischmannia (2 members)
- Ageratina altissima (2 members)
- Asteraceae (tribe Heliantheae) subtribe Zaluzaniinae (2 members)
- Heliopsis helianthoides (2 members)
- Chrysogonum (2 members)
- Silphium terebinthinaceum (2 members)
- Silphium perfoliatum (2 members)
- Silphium integrifolium (2 members)
- Silphium radula (2 members)
- Echinacea paradoxa (2 members)
- Scabrethia (2 members)
- Xanthium (2 members)
- Phoebanthus (2 members)
- Flourensia (2 members)
- Geraea (2 members)
- Wedelia (2 members)
- Acmella (2 members)
- Lagascea (2 members)
- Simsia (2 members)
- Helianthus petiolaris (2 members)
- Helianthus occidentalis (2 members)
- Helianthus pauciflorus (2 members)
- Heliomeris longifolia (2 members)
- Bebbia (2 members)
- Galinsoga parviflora (2 members)
- Asteraceae (tribe Heliantheae) subtribe Dimeresiinae (2 members)
- Coreopsis sect. Tuckermannia (2 members)
- Coreopsis sect. Calliopsis (2 members)
- Asteraceae (tribe Heliantheae) subtribe Varillinae (2 members)
- Pectis papposa (2 members)
- Nicolletia (2 members)
- Thymophylla aurea (2 members)
- Haploësthes (2 members)
- Pseudoclappia (2 members)
- Asteraceae (tribe Heliantheae) subtribe Jaumeinae (2 members)
- Layia pentachaeta (2 members)
- Centromadia pungens (2 members)
- Deinandra increscens (2 members)
- Holocarpha virgata (2 members)
- Blepharizonia (2 members)
- Hemizonia (2 members)
- Anisocarpus (2 members)
- Jensia (2 members)
- Asteraceae (tribe Heliantheae) subtribe Polymniinae (2 members)
- Asteraceae (tribe Heliantheae) subtribe Hymenopappinae (2 members)
- Hymenopappus artemisiifolius (2 members)
- Hymenopappus scabiosaeus (2 members)
- Hymenopappus flavescens (2 members)
- Perityle rupestris (2 members)
- Asteraceae (tribe Heliantheae) subtribe Milleriinae (2 members)
- Perityle megalocephala (2 members)
- Perityle gilensis (2 members)
- Perityle lindheimeri (2 members)
- Asteraceae (tribe Heliantheae) subtribe Guardiolinae (2 members)
- Perityle staurophylla (2 members)
- Lasthenia sect. Burrielia (2 members)
- Lasthenia glabrata (2 members)
- Eriophyllum ambiguum (2 members)
- Eriophyllum confertiflorum (2 members)
- Arnica angustifolia (2 members)
- Arnica griscomii (2 members)
- Arnica lanceolata (2 members)
- Syntrichopappus (2 members)
- Schkuhria (2 members)
- Picradeniopsis (2 members)
- Pseudophoenix (2 members)
- Heliconiaceae (2 members)
- Arecaceae (tribe Areceae) subtribe Dypsidinae (2 members)
- Arecaceae tribe Caryoteae (2 members)
- Caryota (2 members)
- Sparganiaceae (2 members)
- Luzula acuminata (2 members)
- Xyridaceae (2 members)
- Tradescantia occidentalis (2 members)
- Arecaceae (tribe Cocoeae) subtribe Elaeidinae (2 members)
- Xyris stricta (2 members)
- Potamogeton foliosus (2 members)
- Spirodela (2 members)
- Najadaceae (2 members)
- Limnocharitaceae (2 members)
- Arecaceae tribe Hyophorbeae (2 members)
- Aponogetonaceae (2 members)
- Arecaceae (tribe Areceae) subtribe Ptychospermatinae (2 members)
- Juncus triglumis (2 members)
- Juncus ensifolius (2 members)
- Arecaceae (tribe Cocoeae) subtribe Bactridinae (2 members)
- Butomaceae (2 members)
- Scheuchzeriaceae (2 members)
- Juncus hemiendytus (2 members)
- Ruppiaceae (2 members)
- Ruppia (2 members)
- Arecaceae tribe Cyclospatheae (2 members)
- Peltandra (2 members)
- Arecaceae tribe Phoeniceae (2 members)
- Phoenix (2 members)
- Juncus falcatus (2 members)
- Arecaceae (tribe Corypheae) subtribe Sabalinae (2 members)
- Musaceae (2 members)
- Arecaceae (tribe Areceae) subtribe Roystoneinae (2 members)
- Zannichelliaceae (2 members)
- Guzmania monostachia (2 members)
- Hechtia (2 members)
- Sagittaria lancifolia (2 members)
- Cannaceae (2 members)
- Zostera (2 members)
- Thalia (2 members)
- Acoraceae (2 members)
- Mayacaceae (2 members)
- Commelina diffusa (2 members)
- Acorus (2 members)
- Livistona (2 members)
- Ptychosperma (2 members)
- Typhaceae (2 members)
- Thrinax (2 members)
- Arisaema (2 members)
- Musa (2 members)
- Juncus covillei (2 members)
- Guzmania (2 members)
- Juncus validus (2 members)
- Washingtonia (2 members)
- Carex deflexa (2 members)
- Carex tonsa (2 members)
- Carex inops (2 members)
- Carex communis (2 members)
- Carex lucorum (2 members)
- Carex sect. Pictae (2 members)
- Carex sect. Albae (2 members)
- Carex filifolia (2 members)
- Eleocharis compressa (2 members)
- Eleocharis microcarpa (2 members)
- Eleocharis flavescens (2 members)
- Eleocharis sect. Parvulae (2 members)
- Fimbristylis puberula (2 members)
- Bulbostylis ciliatifolia (2 members)
- Eriophorum angustifolium (2 members)
- Cyperus subg. Juncellus (2 members)
- Cyperus subg. Diclidium (2 members)
- Dulichium (2 members)
- Dulichium arundinaceum (2 members)
- Rhynchospora harveyi (2 members)
- Scleria pauciflora (2 members)
- Carex stipata (2 members)
- Carex fissa (2 members)
- Carex muehlenbergii (2 members)
- Fuirena simplex (2 members)
- Carex sect. Holarrhenae (2 members)
- Carex sect. Ammoglochin (2 members)
- Carex sect. Macrocephalae (2 members)
- Carex glareosa (2 members)
- Carex canescens (2 members)
- Bolboschoenus maritimus (2 members)
- Carex brunnescens (2 members)
- Carex deweyana (2 members)
- Carex bromoides (2 members)
- Carex atlantica (2 members)
- Carex echinata (2 members)
- Carex scoparia (2 members)
- Carex tribuloides (2 members)
- Carex tenera (2 members)
- Schoenoplectus acutus (2 members)
- Carex crinita (2 members)
- Carex bigelowii (2 members)
- Carex microchaeta (2 members)
- Schoenoplectus purshianus (2 members)
- Carex laxiculmis (2 members)
- Carex debilis (2 members)
- Carex petricosa (2 members)
- Carex luzulina (2 members)
- Carex sect. Anomalae (2 members)
- Carex sect. Circinatae (2 members)
- Carex sect. Dornera (2 members)
- Calamagrostis porteri (2 members)
- Calamagrostis stricta (2 members)
- Holcus (2 members)
- Anthoxanthum monticola (2 members)
- Ammophila breviligulata (2 members)
- Milium (2 members)
- Alopecurus aequalis (2 members)
- Apera (2 members)
- Avenula (2 members)
- Arctagrostis (2 members)
- Melica geyeri (2 members)
- Melica stricta (2 members)
- Melica porteri (2 members)
- Pleuropogon californicus (2 members)
- Achnatherum parishii (2 members)
- Achnatherum lemmonii (2 members)
- Achnatherum nelsonii (2 members)
- Phyllostachys (2 members)
- Ptilagrostis (2 members)
- Piptatherum miliaceum (2 members)
- Stipa (2 members)
- Hesperostipa comata (2 members)
- Poaceae tribe Olyreae (2 members)
- Austrostipa (2 members)
- Poaceae tribe Brachypodieae (2 members)
- Poaceae tribe Bromeae (2 members)
- Bromus catharticus (2 members)
- Bromus carinatus (2 members)
- Bromus pumpellianus (2 members)
- Poaceae subfam. Pharoideae (2 members)
- Poaceae tribe Ehrharteae (2 members)
- Hordeum brachyantherum (2 members)
- Hordeum jubatum (2 members)
- Hordeum marinum (2 members)
- Secale (2 members)
- Agropyron (2 members)
- Poaceae tribe Phareae (2 members)
- Elymus alaskanus (2 members)
- Elymus stebbinsii (2 members)
- Zizania aquatica (2 members)
- Leymus mollis (2 members)
- Leymus simplex (2 members)
- Leymus innovatus (2 members)
- Zizania palustris (2 members)
- Thinopyrum intermedium (2 members)
- Festuca subg. Montanae (2 members)
- Festuca sect. Subulatae (2 members)
- Festuca viviparoidea (2 members)
- Poaceae tribe Brachyelytreae (2 members)
- Lolium temulentum (2 members)
- Brachyelytrum (2 members)
- Phippsia (2 members)
- Poaceae tribe Nardeae (2 members)
- Poa saltuensis (2 members)
- Poa sect. Arenariae (2 members)
- Poa bulbosa (2 members)
- Poaceae tribe Diarrheneae (2 members)
- Poa sect. Alpinae (2 members)
- Poa alpina (2 members)
- Diarrhena (2 members)
- Glyceria grandis (2 members)
- Poa laxa (2 members)
- Poa secunda (2 members)
- Poa stenantha (2 members)
- Poa unilateralis (2 members)
- Poa subg. Arctopoa (2 members)
- Glyceria canadensis (2 members)
- Arctagrostis latifolia (2 members)
- Glyceria septentrionalis (2 members)
- Desmazeria (2 members)
- Cynosurus (2 members)
- Parapholis (2 members)
- Podagrostis (2 members)
- Helictotrichon (2 members)
- Poaceae tribe Aristideae (2 members)
- Aristida dichotoma (2 members)
- Aristida longespica (2 members)
- Poaceae tribe Centotheceae (2 members)
- Poaceae tribe Thysanolaeneae (2 members)
- Poaceae tribe Gynerieae (2 members)
- Eragrostis ciliaris (2 members)
- Digitaria eriantha (2 members)
- Anthenantia (2 members)
- Amphicarpum (2 members)
- Lasiacis (2 members)
- Echinochloa muricata (2 members)
- Echinochloa crus-pavonis (2 members)
- Sacciolepis (2 members)
- Dichanthelium sect. Pedicellata (2 members)
- Dichanthelium oligosanthes (2 members)
- Dichanthelium ensifolium (2 members)
- Dichanthelium chamaelonche (2 members)
- Eragrostis mexicana (2 members)
- Dichanthelium sect. Lancearia (2 members)
- Dichanthelium portoricense (2 members)
- Panicum miliaceum (2 members)
- Panicum capillare (2 members)
- Panicum hallii (2 members)
- Panicum amarum (2 members)
- Panicum anceps (2 members)
- Eragrostis pilosa (2 members)
- Panicum sect. Bulbosa (2 members)
- Panicum sect. Monticola (2 members)
- Panicum sect. Verrucosa (2 members)
- Eriochloa michauxii (2 members)
- Eriochloa acuminata (2 members)
- Setaria subg. Reverchoniae (2 members)
- Setaria viridis (2 members)
- Setaria pumila (2 members)
- Poaceae subfam. Arundinoideae (2 members)
- Saccharum brevibarbe (2 members)
- Ischaemum (2 members)