Boechera pusilla
Boechera bodiensis
Bodie Hills rock cress
usually 2–6 per caudex branch, arising from margin of rosette near ground surface, 0.5–2 dm, glabrous or sparsely pubescent proximally, trichomes simple and short-stalked, 2-rayed, to 0.2 mm, glabrous distally.
usually 1 per caudex branch, arising from center of rosette near ground surface, 1.5–3.5 dm, densely pubescent proximally, trichomes short-stalked, 5–10-rayed, to 0.7 mm, sparsely pubescent or glabrous distally.
blade linear-oblanceolate, 1–2.5 mm wide, margins entire, ciliate along petiole, trichomes (simple), 0.4–0.7 mm, surfaces usually sparsely pubescent, rarely glabrous, trichomes short-stalked, 2- or 3-rayed, 0.1–0.4 mm.
blade narrowly oblanceolate, 1–3 mm wide, margins entire, ciliate proximally, trichomes to 0.7 mm, surfaces densely pubescent, trichomes short-stalked, 5–10-rayed, 0.08–0.25 mm.
3–5, not concealing stem;
blade auricles 0–0.2 mm, surfaces of distalmost leaves usually glabrous or, rarely, margins sparsely ciliate.
4–9, not concealing stem;
blade auricles 0.5–2 mm, surfaces of distalmost leaves pubescent.
6–13-flowered, unbranched.
8–25-flowered, usually unbranched.
divaricate-ascending at anthesis;
sepals glabrous or sparsely pubescent, trichomes spreading, 2-rayed;
petals white to lavender, 4–5 × 1.5–1.8 mm, glabrous;
pollen spheroid.
ascending at anthesis;
sepals pubescent;
petals lavender to purple, 4–5 × ca. 1 mm, glabrous;
pollen spheroid.
horizontal to divaricate-descending, straight or slightly curved downward, 2–5 mm, glabrous.
ascending to divaricate-ascending, straight, 3–7 mm, pubescent, trichomes appressed, branched.
horizontal or divaricate-descending, not appressed to rachis, secund, straight, edges parallel, 1.6–3.2 cm × 1.5–2 mm;
valves glabrous;
ovules 20–32 per ovary;
style 0.1–0.4 mm.
divaricate-ascending, not appressed to rachis, not secund, straight or curved, edges parallel, 4–6.2 cm × 1.2–1.8 mm;
valves glabrous;
ovules 48–68 per ovary;
style 0.1–0.2 mm.
uniseriate, 1.2–1.5 × 0.8–0.9 mm;
not winged or with distal wing 0.05–0.1 mm wide.
uniseriate, 1–1.5 × 0.8–1.2 mm;
wing continuous, 0.1–0.15 mm wide.
Boechera pusilla
Boechera bodiensis
Of conservation concern.
Morphological evidence suggests that Boechera pusilla is an apomictic species that arose through hybridization between B. lemmonii and B. pendulina; it is known only from the type locality in southwestern Wyoming.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
In his original description, Rollins suggested that Boechera bodiensis is closely related to B. cobrensis and B. falcifructa. Subsequent studies (M. D. Windham and I. A. Al-Shehbaz, unpubl.) indicate that both B. bodiensis and B. falcifructa are apomictic hybrids containing one or more genomes derived from B. cobrensis. In the case of B. falcifructa, the second parent is clearly B. fernaldiana, but the second parent of B. bodiensis remains uncertain. Boechera bodiensis is most similar to B. falcifructa. The latter differs by having gently recurved fruiting pedicels 6–12 mm, 62–80 ovules per ovary, and pendulous fruits; it is known from Elko and Lander counties, Nevada. By contrast, B. bodiensis has straight fruiting pedicels 3–7 mm long, divaricate-ascending fruits, 48–68 ovules per ovary, and is known from Mono County, California, and Lyon and Mineral counties, Nevada.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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