Boechera tiehmii
Novon 13: 389. 2003.
Perennials; long-lived; sexual; caudex woody (covered by persistent leaf-bases). Stems usually 2–5 per caudex branch, arising from margin of rosette near ground surface, 0.8–2 (–3) dm, glabrous throughout. Basal leaves: blade oblanceolate, (2–) 3–7 mm wide, margins usually entire, rarely denticulate, ciliate, trichomes (simple and short-stalked) 2-rayed or 3-rayed, 0.2–0.4 mm, surfaces glabrous. Cauline leaves: 3–5, not concealing stem; blade auricles absent or, rarely, to 0.5 mm, surfaces of distalmost leaves glabrous. Racemes 10–16-flowered, usually unbranched. Fruiting pedicels ascending, straight, 3–7 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals white to lavender, 4–5 × 1.2–1.7 mm, glabrous; pollen ellipsoid. Fruits ascending, not appressed to rachis, not secund, straight, edges parallel, 1.5–3.7 cm × 1.4–1.7 mm; valves glabrous; ovules 14–22 per ovary; style 0.2–0.6 mm. Seeds uniseriate, 1.7–2.2 × 1–1.2 mm; wing absent or distal, 0–0.5 mm wide.
Phenology: Flowering Jun–Aug.
Habitat: Rock outcrops and gravelly soils in alpine and subalpine habitats
Elevation: 3000-3500 m
Discussion
Of conservation concern.
Boechera tiehmii is a sexual species considered by R. C. Rollins (1993) to be related to Arabis (Boechera) davidsonii. It is known only from Mono County, California, and Washoe County, Nevada.
Selected References
None.
Lower Taxa
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