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Published In: Novon 13(4): 386. 2003. (Novon) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/21/2009)

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48. Boechera inyoensis (Rollins) Al-Shehbaz, Novon 13: 386. 2003; Arabis inyoensis Rollins, Rhodora 43: 457. 1941; Boechera selbyi (Rydberg) W. A. Weber var. inyoensis (Rollins) N. H. Holmgren, Brittonia 56: 246. 2004. TYPE: United States, sand, in the Sierra foothills near the county hospital at Big Pine, 15 May 1906, A. A. Heller 8259 (holotype, GH!; isotypes, CAS!, E!, MO!, NY!, UC!, US!).

Arabis holboellii Hornemann var. derensis S. L. Welsh in S. L. Welsh et al., Utah Fl., ed. 3. 257. 2003. TYPE: United States, Utah, Millard Co., rocky foothills, Whitesage Valley, 5700 ft, 11 May 1935, B. F. Harrison 6357 (holotype, BRY!; isotype, BRY!).

     Plants short-lived perennials, with mostly non-woody caudices, lacking crowded, persistent leaf bases; apomictic, with spheroid pollen. Stems usually 1 per caudex, arising near ground surface from center of basal rosettes, (1.0–)2.5–6.5 dm, lower parts with abundant short-stalked, 7–12-rayed trichomes 0.1–0.2 mm, upper parts densely to sparsely pubescent. Leaves at stem bases oblanceolate, 1–4(–8) mm wide, entire, ciliate on petioles with simple trichomes to 1 mm, blade surfaces densely pubescent with short-stalked, 3–10-rayed trichomes 0.2–0.7 mm; cauline leaves (7–)12–35, concealing stem proximally, the uppermost densely pubescent, with auricles 0.5–2 mm. Inflorescences mostly unbranched, 10–65-flowered; fruiting pedicels 5–15 mm, divaricate-ascending to horizontal, straight or slightly curved downward, with few appressed, branched trichomes. Flowers ascending at anthesis; sepals pubescent; petals lavender to purplish, 5–8 ´ 1.2–2.0 mm, glabrous; ovules 74–134 per fruit. Fruits 3.7–6.5 cm ´ 1.5–2.2 mm, divaricate-ascending to widely pendent, not appressed to rachises, not secund, curved or rarely straight, with parallel edges, glabrous; style 0.05–0.20 mm. Seeds subbiseriate or rarely uniseriate, 1.7–2.0 ´ 1–1.5 mm; wing continuous, 0.1–0.2 mm wide. 2n = 21.

Flowering: Apr–Jun.

Habitat: limestone and volcanic rock outcrops and clay soils in desert scrub and pinyon-juniper woodland.

Elevation: 1400–2400 m.

Distribution: United States (California, Nevada, Utah).

Reproductive mode: apomictic triploid.




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