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Cusickiella douglasii

Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key

Habit: Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1--many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
Genera In Family: +- 330 genera, 3780 species: worldwide, especially temperate. Note: Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central NCoR, Carrichtera annua (L.) DC. in SCo, Iberis sempervirens L., Iberis umbellata L. in PR, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella.
eFlora Treatment Author: Ihsan A. Al-Shehbaz, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: CusickiellaView DescriptionDichotomous Key

Habit: Perennial herb, low-cespitose, cushion-like; caudex woody, many-branched; hairs simple or mixed with stalked forked or +- many-branched hairs. Stem: scapose, erect, leaves 0--few. Leaf: basal rosetted at tip of caudex branches, sessile, entire, thickened at base; cauline few or 0, bases not lobed. Inflorescence: +- elongated; bracts 0--few. Flower: sepals erect or ascending, base not sac-like; petals white to pale yellow. Fruit: silicle, sessile, ovoid to ellipsoid, dehiscent, unsegmented; valves rounded or keeled, glabrous or hairy; stigma entire. Seed: 1--4, plump, +- ovoid to oblong; wing 0.
Species In Genus: 2 species: western United States. Etymology: (W.C. Cusick, Oregon plant collector, 1842--1922)
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Reference: Rollins 1988 J Jap Bot 63:65--69

Cusickiella douglasii (A. Gray) Rollins
Habit: Crisped-hairy. Stem: 1--5 cm. Leaf: oblanceolate to oblong, thick, leathery, margin ciliate; cauline 0. Flower: sepals 2.5--4 mm; petals 3.5--6 mm. Fruit: (2)3--5.5(7) mm, ovoid to ellipsoid; style (0.5)1--2(2.5) mm; pedicel spreading to ascending, 2--6(8) mm. Seed: 2--3 mm, ovoid to oblong.
Ecology: Rocky ridges, scree, loose volcanic slopes; Elevation: 1500--2500 m. Bioregional Distribution: KR, NCoR, SN, SnBr, GB; Distribution Outside California: to Washington, Idaho, Utah. Flowering Time: May--Jun
Synonyms: Draba douglasii A. Gray var. crockeri (Lemmon) C.L. Hitchc.;
Jepson eFlora Author: Ihsan A. Al-Shehbaz
Reference: Rollins 1988 J Jap Bot 63:65--69
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botanical illustration including Cusickiella douglasii


Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Cusickiella douglasii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on November 19, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on November 19, 2018.

Cusickiella douglasii
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© 2009 Gary A. Monroe
Cusickiella douglasii
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© 2008 Steve Matson
Cusickiella douglasii
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© 2006 Steve Matson
Cusickiella douglasii
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© 2006 Steve Matson
Cusickiella douglasii
click for enlargement
© 2008 Steve Matson
Cusickiella douglasii
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© 2009 Thomas Stoughton

More photos of Cusickiella douglasii in CalPhotos

Geographic subdivisions for Cusickiella douglasii:
KR, NCoR, SN, SnBr, GB;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.