Boechera glaucovalvula |
Boechera subpinnatifida |
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bluepod rockcress |
ashy rock-cress, Klamath rockcress |
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Habit | Perennials; short- to long-lived; sexual; caudex usually not woody. | Perennials; long-lived; sexual; caudex woody (often with persistent, crowded leaf bases). |
Stems | usually 1 per caudex branch, arising from center of rosette near ground surface, (0.6–)1–4.5 dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.1–0.4 mm, similarly pubescent distally. |
usually 1 per caudex branch, arising from center of rosette near ground surface, 1–4(–5) dm, densely pubescent proximally, trichomes short-stalked, 2–6-rayed, 0.1–0.2 mm, sparsely pubescent distally. |
Basal leaves | blade linear to linear-oblanceolate, 2–4(–6) mm wide, margins entire, usually ciliate at petiole base, trichomes (simple or spurred), to 1.5 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.1–0.4 mm. |
blade narrowly oblanceolate, 1–4(–5) mm wide, margins prominently dentate to subpinnatifid (leaf margins of sterile shoots often entire), ciliate near petiole base, trichomes (simple or 2-rayed), 0.4–0.6 mm, surfaces densely pubescent, trichomes short-stalked, (2–)4–9-rayed, 0.05–0.2 mm. |
Cauline leaves | 6–10, not concealing stem; blade auricles absent, surfaces of distalmost leaves densely pubescent. |
(10–)20–60, often concealing stem throughout; blade auricles 0.5–3 mm, surfaces of distalmost leaves moderately to sparsely pubescent. |
Racemes | (5–)10–25-flowered, usually unbranched. |
8–30-flowered, usually unbranched. |
Flowers | divaricate at anthesis; sepals pubescent; petals light purple to lavender, 6–9 × 1.5–2.5 mm, glabrous; pollen ellipsoid. |
divaricate-ascending to pendent at anthesis; sepals pubescent; petals usually purple, rarely lavender, 9–14 × 1.5–3 mm, glabrous; pollen ellipsoid. |
Fruiting pedicels | reflexed, strongly curved at base, 2–10 mm, pubescent, trichomes appressed, branched. |
reflexed, strongly recurved, 5–15 mm, pubescent, trichomes appressed, branched. |
Fruits | strongly reflexed, sometimes appressed to rachis, often secund, straight, edges parallel, (1.8–)2.5–4.5 cm × 5–8 mm; valves glabrous; ovules 24–62 per ovary; style 0.2–0.6 mm. |
pendent, not appressed to rachis, not secund, straight to slightly curved, edges parallel, (3.5–)5–8 cm × (1.6–)2–3 mm; valves pubescent throughout; ovules 24–42 per ovary; style 0.5–1 mm. |
Seeds | biseriate, 5–6 × 4–5 mm; wing continuous, 1.8–2.5 mm wide. |
uniseriate, 2.5–3.5 × 1.5–2.2 mm; wing continuous or at both ends, 0.4–0.8 mm wide. |
2n | = 14. |
= 14. |
Boechera glaucovalvula |
Boechera subpinnatifida |
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Phenology | Flowering Mar–Apr. | Flowering Mar–May. |
Habitat | Rocky slopes and gravelly soil, usually under shelter of desert shrubs | Rock outcrops, talus, gravelly soil, often in sagebrush-grassland communities |
Elevation | 600-1600 m (2000-5200 ft) | 800-2400 m (2600-7900 ft) |
Distribution |
CA; NV
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CA; ID; NV; OR; UT
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Discussion | Boechera glaucovalvula, a distinctive sexual diploid that has the widest fruits in the genus, is known from Inyo, Mono, Riverside, and San Bernardino counties, California, and Clark and Nye counties, Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Originally thought to be restricted to northern California and adjacent Oregon, Boechera subpinnatifida is a sexual species that recently has been found in central Idaho, northern Nevada, and northwestern Utah. It appears to intergrade with both B. puberula and B. retrofracta, and species boundaries within this complex need further study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 380. | FNA vol. 7, p. 409. |
Parent taxa | Brassicaceae > tribe Boechereae > Boechera | Brassicaceae > tribe Boechereae > Boechera |
Sibling taxa | ||
Synonyms | Arabis glaucovalvula | Arabis subpinnatifida |
Name authority | (M. E. Jones) Al-Shehbaz: Novon 13: 385. (2003) | (S. Watson) Al-Shehbaz: Novon 13: 389. (2003) |
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