Boechera subpinnatifida |
Boechera suffrutescens |
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ashy rockcress |
woody rockcress |
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Habit | Plants long-lived perennial; with woody caudices. | Plants long-lived perennial; with woody caudices. |
Stems | 1–4(5) dm; lower parts with short-stalked, 2–6-rayed trichomes; upper parts sparsely pubescent. |
1–4(5) dm; lower parts glabrous or rarely with short-stalked, 2-rayed trichomes; upper parts glabrous. |
Basal leaves | narrowly oblanceolate, 1–4(5) mm wide; margins prominently dentate to subpinnatifid; entire on those of sterile shoots; surfaces densely pubescent with short-stalked; (2)4–9-rayed trichomes, ciliate near petiole bases with simple or 2-rayed trichomes. |
narrowly oblanceolate, 1.5–6 mm wide; margins entire, not ciliate or rarely with simple trichomes; surfaces glabrous or sparsely to densely pubescent with short-stalked, 2–6-rayed trichomes. |
Cauline leaves | (10)20–60, often concealing stem throughout, bases uppermost auriculate and sparsely to moderately pubescent. |
(4)6–12, occasionally concealing stem proximally, bases auriculate; uppermost glabrous. |
Inflorescences | 8–30-flowered, fruiting pedicels reflexed, strongly recurved, 5–15 mm, with appressed, branched trichomes. |
6–12-flowered, fruiting pedicels reflexed, usually abruptly recurved at bases but otherwise straight, 4–18 mm, glabrous. |
Flowers | sexual, divaricate-ascending to pendent at anthesis; sepals glabrous; petals 9–14 × 1.5–3 mm, purple or rarely lavender; pollen ellipsoid; ovules 24–42 per ovary; styles 0.5–1 mm. |
sexual or apomictic, pendent at anthesis; sepals glabrous; petals 4.5–6 × 2–2.5 mm, purple or whitish with rose tips; sexual pollen ellipsoid, apomictic pollen spheroid; ovules 20–30 per ovary; styles 0.4–1.2 mm. |
Fruits | pendent, not appressed to rachis, not secund; straight to slightly curved; (3.5)5–8 cm × 2–3 mm; margins parallel, pubescent. |
reflexed to closely pendent, occasionally appressed to rachis, often secund; straight to somewhat curved, 3–7(8) cm × 3–6 mm; margins undulate and non-parallel, glabrous. |
Seeds | uniseriate, 2.5–3.5 × 1.5–2.2 mm; wings continuous or at both ends, 0.4–0.8 mm wide. |
uniseriate, 2.5–5.5 × 1.8–3.5 mm; wings continuous, 0.8–1.5 mm wide. |
2n | =14. |
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Boechera subpinnatifida |
Boechera suffrutescens |
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Distribution | ||
Discussion | Talus, rock outcrops, gravelly soil, sagebrush-grassland communities. Flowering Mar–Jun. 100–1800 m. Lava, Sisk. CA, ID, NV; southeast to UT. Native. |
Rocky slopes, gravelly soil, sagebrush communities. Flowering Jun–Aug. 1600–2400 m. BR, BW, ECas. CA, ID, NV, WA. Native. |
Source | Flora of Oregon, volume 2, page 457 Ihsan Al-Shehbaz |
Flora of Oregon, volume 2, page 457 Ihsan Al-Shehbaz |
Sibling taxa | ||
Synonyms | Arabis subpinnatifida | Arabis suffrutescens, Arabis suffrutescens var. suffrutescens |
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