Boechera dispar

(M. E. Jones) Al-Shehbaz

Novon 13: 384. 2003.

Basionym: Arabis dispar M. E. Jones Contr. W. Bot. 8: 41. 1898
Synonyms: Arabis juniperina M. E. Jones Arabis nardina Greene Arabis salubris M. E. Jones
Treatment appears in FNA Volume 7. Treatment on page 374. Mentioned on page 353.

Perennials; usually long-lived; sexual; caudex often woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.9–3 dm, densely pubescent proximally, trichomes short-stalked, 5–12-rayed, 0.1–0.3 mm, sparsely pubescent to glabrescent distally. Basal leaves: blade linear-oblanceolate, 2–5 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 5–12(–16)-rayed, 0.1–0.3 mm. Cauline leaves: 1–5, not concealing stem; blade without auricles, surfaces of distalmost leaves pubescent. Racemes 4–15(–20)-flowered, unbranched. Fruiting pedicels ascending, straight, 4–15(–25) mm, pubescent, trichomes appressed, branched. Flowers ascending at anthesis; sepals pubescent; petals purple to lavender, 3.5–6 × 1–1.5 mm, glabrous; pollen ellipsoid. Fruits divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 4–7.3 cm × 2.7–4 mm; valves glabrous; ovules 44–52 per ovary; style 0.05–0.1 mm. Seeds uniseriate, 1.9–2.3 mm in diam.; wing continuous, 0.3–0.5 mm wide.


Phenology: Flowering Apr–May.
Habitat: Rocky slopes and gravelly soil in desert scrub and pinyon-juniper communities
Elevation: 1500-2300 m

Discussion

Boechera dispar is a distinctive sexual diploid that is known from Inyo, Mono, and San Bernardino counties, California, and Nye County, Nevada.

Selected References

None.

Lower Taxa

None.
... more about "Boechera dispar"
Ihsan A. Al-Shehbaz +  and Michael D. Windham +
(M. E. Jones) Al-Shehbaz +
Arabis dispar +
Calif. +  and Nev. +
1500-2300 m +
Rocky slopes and gravelly soil in desert scrub and pinyon-juniper communities +
Flowering Apr–May. +
Arabis juniperina +, Arabis nardina +  and Arabis salubris +
Boechera dispar +
Boechera +
species +