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Ihsan A. Al-Shehbaz, except as noted

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.
± 330 genera, 3780 species: worldwide, especially temperate. [Al-Shehbaz et al. 2006 Plant Syst Evol 259:89–120] 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 North Coast Ranges, Carrichtera annua (L.) DC. in South Coast, Iberis sempervirens L., Iberis umbellata L. in Peninsular Ranges, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern Outer North Coast Ranges, Central Coast. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Brassicaceae

Annual [perennial herb], scapose; hairs 0 or simple. Leaf: basal rosetted, petioled, entire or dissected; cauline 0 or few, sessile, base not lobed. Inflorescence: elongated. Flower: sepals ascending to spreading, base not sac-like; petals white, equal or not, not clawed; stamens 4 or 6, filaments with white basal appendage. Fruit: silicle, dehiscent, broadly cordate to round, flat perpendicular to septum, tip winged and shallowly notched, unsegmented; stigma entire. Seed: 2–4, in 1 row, wingless.
3 species: Europe. (R. Teesdale, English botanist, horticulturist, 1740–1804) [Appel 1998 Novon 8:218–219]

Key to Teesdalia

T. nudicaulis (L.) W.T. Aiton
Plant glabrous or sparsely hairy. Stem: 0.5–1.5(2) dm, 1 to many from base, simple. Leaf: blade oblanceolate to obovate in outline, 0.3–1.5(2) cm, pinnately lobed (dentate or entire); cauline 0–4, linear to oblong, dentate or entire. Flower: sepals 0.5–0.8(1) mm; petals oblong to obovate, outer pair 1.5–2.5 mm, 0.6–1 mm wide; inner pair 0.5–1 mm, 0.3–0.4 mm wide. Fruit: 3–4.5 mm, 3–4.5 mm wide; pedicel spreading, 3–7 mm.
2n=36. Uncommon. Wet, disturbed areas; < 100 m. Central Coast (Fort Ord, Monterey Co.); northern to Washington, eastern United States; native to Europe. Apr–Jun [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Dec 1 2015
Citation for this treatment: [Author of taxon treatment] 2013. Teesdalia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Dec 1 2015

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Geographic subdivisions indicated for the distribution of Teesdalia nudicaulis Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.