Arabis blepharophylla |
Brassicaceae tribe Arabideae |
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coast rock cress, rose rockcress |
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Habit | Perennials; (caudex simple or branched, covered with persistent petiolar remains); sparsely to moderately pubescent, trichomes simple, forked-stalked, or rarely cruciform or 3-rayed, stalked, stellate. | Annuals, biennials, or perennials [subshrubs]; eglandular. |
Stems | simple or few from base (caudex), erect, unbranched or branched (few) distally, 0.6–2.5(–3) dm, (usually pubescent throughout, rarely subglabrate). |
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Basal leaves | petiole 0.5–3(–6) cm, (ciliate); blade oblanceolate, spatulate, or obovate, (1.5–)2.1–3.5(–6) cm × (5–)8–20(–25) mm, margins entire or dentate, (ciliate), apex obtuse, surfaces pubescent or glabrous, trichomes simple and forked, sometimes mixed with 3- or 4-rayed stellate ones. |
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Cauline leaves | (2 or) 3–6 (or 7); blade oblong or ovate, 1–2(–4) cm × (2–)4–10(–15) mm, base not auriculate, margins entire or dentate, (ciliate), apex obtuse, surfaces pubescent as basal leaves. |
petiolate or sessile; blade base auriculate or not, margins entire or dentate. |
Trichomes | stalked or sessile, usually stellate, dendritic, cruciform, or forked, sometimes mixed with simple ones, rarely malpighiaceous. |
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Racemes | simple, (dense). |
usually ebracteate, often elongated in fruit. |
Flowers | sepals (purple), oblong, 5–7 × 1.5–2 mm, lateral pair saccate basally; petals purple, spatulate or broadly so, (12–)14–18 × 4–7 mm, apex obtuse or rounded; filaments 6–8 mm; anthers narrowly oblong, 1.2–1.5 mm. |
actinomorphic; sepals erect, ascending, or spreading, lateral pair seldom saccate basally; petals white, yellow, orange, pink, or purple, claw usually present, usually distinct; filaments unappendaged, not winged; pollen 3-colpate. |
Fruiting pedicels | ascending to erect, (3–)5–10(–15) mm. |
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Fruits | erect or nearly so, slightly torulose, 2–4 cm × 2–3 mm; valves each with prominent midvein extending full length or rarely to middle; ovules 20–28 per ovary; style 0.2–1(–1.5) mm. |
silicles or siliques, usually dehiscent, very rarely indehiscent, unsegmented, latiseptate or terete; ovules 2–70(–88)[–110+] per ovary; style usually distinct, sometimes obsolete; stigma usually entire, rarely 2-lobed. |
Seeds | narrowly winged throughout, orbicular or suborbicular, 2–2.5 mm in diam.; wing 0.2–0.4 mm wide (wider distally). |
biseriate or uniseriate [rarely aseriate]; cotyledons accumbent. |
2n | = 16. |
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Arabis blepharophylla |
Brassicaceae tribe Arabideae |
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Phenology | Flowering Mar–Apr. | |
Habitat | Rocky hillsides and bluffs, grassy hillsides, slopes | |
Elevation | 50-200 m (200-700 ft) | |
Distribution |
CA
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North America; Mexico; South America; Europe; Asia; n Africa |
Discussion | Arabis blepharophylla is an attractive species on the gradual increase in cultivation as an ornamental. It is recorded from Contra Costa, Marin, San Francisco, San Mateo, Santa Cruz, and Sonoma counties; most of the records are based on older collections. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genera 8, species ca. 460 (4 genera, 139 species in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 266. | FNA vol. 7, p. 256. |
Parent taxa | ||
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Hooker & Arnott: Bot. Beechey Voy., 321. (1838) | de Candolle: Mém. Mus. Hist. Nat. 7: 229. (1821) |
Web links |