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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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, biennial, perennial herb; base not woody; hairs simple, forked, or stellate; caudex branched or not. Stem: branched or not, leafy. Leaf: basal rosetted, petioled, entire or dentate; cauline sessile, entire or dentate, base lobed or not. Flower: sepals erect or ascending, base of lateral pair sac-like or not; petals spoon-shaped to oblong, oblanceolate, or obovate, white to pink or deep purple. Fruit: silique, erect to spreading, linear, dehiscent, unsegmented, straight, flat parallel to septum, glabrous. Seed: 12–110, 1 row per chamber, flat, winged or margined.Key to Arabis
< 70 species: temperate North America, Eurasia, northern Africa. (Latin: of Arabia) Most species of Arabis in TJM (1993) moved to Boechera; Arabis glabra to Turritis. California record of Arabis aculeolata Greene not confirmed.
Biennial or weak perennial herb; caudex branched or not; hairs simple and short-stalked forked, coarse, spreading. Stem: 1–several, simple or branched distally, erect, 1–8 dm. Leaf: basal short-petioled, 2–10 cm, oblong to obovate or spoon-shaped, entire to dentate; cauline (7)10–45(61), ovate to oblong or lanceolate, sagittate or lobed at base. Flower: sepals 2–4 mm; petals 3.5–5(5.5) mm, 1–2(2.5) mm wide, white. Fruit: (3.5)4–6 cm, 0.8–1(1.2) mm wide; style (0.2)0.5–1 mm; pedicel 0.5–1.5 cm, glabrous to sparsely hairy. Seed: (54)60–86, oblong or ± round; wing to 0.2 mm, continuous.
2n=32. Gravelly soils, swales, disturbed sites, meadows, shady slopes, occasionally moist; < 2500 m. Klamath Ranges, Outer North Coast Ranges, Cascade Range, Sierra Nevada, San Bernardino Mountains, White and Inyo Mountains; Canada, United States except Alaska, Hawaii. [Arabis hirsuta (L.) Scop. var. pycnocarpa (M. Hopkins) Rollins] Other variety in Ontario, central United States. Mar–Jul [Online Interchange]
Unabridged synonyms: [Arabis hirsuta subsp. pycnocarpa (M. Hopkins) Hultén]
Previous taxon: Arabis oregana
Next taxon: Armoracia
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 28 2015
Citation for this treatment: [Author of taxon treatment] 2013. Arabis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=71338, accessed on May 28 2015
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|Geographic subdivisions indicated for the distribution of Arabis pycnocarpa var. pycnocarpa|| 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.
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(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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