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Claytonia perfoliata var. parviflora (Douglas ex Hooker) Torrey Montia perfoliata var. parviflora (Douglas ex Hooker) Jepson Treatment appears in FNA Volume

Basionym: Castanea chrysophylla Douglas ex Hooker Fl. Bor.-Amer. 2: 159. 1838 Synonyms: Castanopsis chrysophylla (Douglas ex Hooker) A. de Candolle Treatment

LAYOUT:treatment:TUOYAL familyPaeoniaceae genusPaeonia speciesPaeonia brownii Douglas ex Hooker Fl. Bor.-Amer. 1: 27. 1829 ,. Fosiée Tahbaz Common names: Brown’s peony

franklinii var. franklinii, Eremogone franklinii var. thompsonii (Douglas ex Hooker) R. L. Hartman & Rabeler Sida 21: 240. 2004. Ronald L. Hartman, Richard

macropetalus Douglas ex Hooker R. sirbenus L. H. Bailey R. ursinus var. eastwoodianus (Rydberg) J. T. Howell R. ursinus subsp. macropetalus (Douglas ex Hooker)

Taxa Horkelia congesta var. congesta, Horkelia congesta var. nemorosa Douglas ex Hooker Bot. Mag. 56: plate 2880. 1829. Barbara Ertter, James L. Reveal Conservation

helleborine Synonyms: Amesia gigantea (Douglas ex Hooker) A. Nelson & J. F. Macbride Helleborine gigantea (Douglas ex Hooker) Druce Treatment appears in FNA Volume

var. purshii (Douglas ex Hooker) Greene Fl. Francisc., 269. 1891. Ihsan A. Al-Shehbaz Basionym: Cheiranthus capitatus Douglas ex Hooker Fl. Bor.-Amer.

breweri, Quercus garryana var. garryana, Quercus garryana var. semota Douglas ex Hooker Fl. Bor.-Amer. 2: 159. 1838. Kevin C. Nixon Common names: Oregon white

Potentilla gracilis var. gracilis, Potentilla gracilis var. owyheensis Douglas ex Hooker Bot. Mag. 57: plate 2984. 1830. Barbara Ertter, James L. Reveal Common

rubra Douglas ex Hooker Fl. Bor.-Amer. 2: 103, plate 172. 1838 Synonyms: Besseya rubra (Douglas ex Hooker) Rydberg Veronica rubra (Douglas ex Hooker) M.

LAYOUT:treatment:TUOYAL familyNyctaginaceae genusAbronia speciesAbronia mellifera Douglas ex Hooker Bot. Mag. 56: plate 2879. 1829. Leo A. Galloway Endemic Treatment appears

Castilleja miniata var. miniata, Castilleja miniata var. oblongifolia Douglas ex Hooker Fl. Bor.-Amer. 2: 106. 1838. J. Mark Egger, Peter F. Zika, Barbara

LAYOUT:treatment:TUOYAL familyPortulacaceae genusMontia speciesMontia linearis (Douglas ex Hooker) Greene Fl. Francisc., 181. 1891. John M. Miller Common names: Narrow-leafed

newberryi A. Gray Proc. Amer. Acad. Arts 6: 532. 1865. not P. gracilis Douglas ex Hooker 1830 Barbara Ertter, James L. Reveal Common names: Newberry’s cinquefoil

Erysimum asperum var. arkansanum Jepson Erysimum asperum var. bealianum (Douglas ex Hooker) B. Boivin Erysimum asperum var. capitatum (Nuttall) Torrey Erysimum

Crataegus douglasii var. suksdorfii Sargent C. punctata var. brevispina Douglas ex Hooker C. suksdorfii (Sargent) Kruschke Treatment appears in FNA Volume 9

and exceedingly variable species rivaling Astragalus lentiginosus Douglas ex Hooker in complexity. Only the variety majus is sometimes recognized at the

Garrya goldmanii, Garrya lindheimeri, Garrya veatchii, Garrya wrightii Douglas ex Lindley Edwards’s Bot. Reg. 20: plate 1686. 1834. Guy L. Nesom Etymology:

menziesii, Spiraea douglasii var. roseata Hooker Fl. Bor.-Amer. 1: 172. 1832. Richard Lis Common names: Douglas’ or rose spiraea western hardhack EndemicIllustrated

racemosa subsp. alba, Pedicularis racemosa subsp. racemosa Douglas ex Bentham in W. J. Hooker, Fl. Bor.-Amer. 2: 108. 1838. Bruce W. Robart Common names:

genusVaccinium sectionVaccinium sect. Myrtillus speciesVaccinium membranaceum Douglas ex Torrey in C. Wilkes et al., U.S. Expl. Exped. 17: 377. 1874,. Sam P. Vander

Grassland, savanna with blue oak (Quercus douglasii Hooker & Arnott) or digger pine (Pinus sabiniana Douglas ex D. Don), usually in well-drained, rocky clay soils

sectionMentzelia sect. Trachyphytum speciesMentzelia albicaulis (Douglas) Douglas ex Torrey & A. Gray Fl. N. Amer. 1: 534. 1840. Joshua M. Brokaw Common

Disella hederacea (Douglas) Greene M. hederacea Douglas M. sulphurea Gillies ex Hooker & Arnott Malvastrum sulphureum (Gillies ex Hooker & Arnott) Grisebach

Besser in W. J. Hooker, Fl. Bor.-Amer. 1: 324. 1833. Leila M. Shultz Common names: Lemon sagewort Endemic Synonyms: Artemisia discolor Douglas ex Besser Artemisia

sectionPotentilla sect. Pensylvanicae speciesPotentilla bipinnatifida Douglas in W. J. Hooker, Fl. Bor.-Amer. 1: 188. 1832. Barbara Ertter, Reidar Elven Common

speciesSelaginella douglasii (Hooker & Greville) Spring Bull. Acad. Roy. Sci. Bruxelles 10: 138. 1843. Iván A. Valdespino Common names: Douglas's spike-moss Endemic

given locality. Douglas's type collection of D. nudicaule represents plants (synonyms D. sarcophyllum Hooker & Arnott and D. peltatum Hooker, an invalid name)