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Published In: Brittonia 32(2): 148–151, f. 1. 1980. (Brittonia) Name publication detail

Project Name Data (Last Modified On 7/23/2009)

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3. Caulanthus barnebyi Rollins & P. Holmgren, Brittonia 32: 148. 1980. TYPE: United States, Nevada, Humboldt Co., S end of Black rock Range, ca. 4800 m, 15 June 1979, R. C. Rollins, K. W. Rollins, A. Tiehm, & M. Williams 79242 (holotype, GH!; isotypes, BM!, CAS!, MO!, NY!, RENO).

Herbs, perennial, with a woody caudex, glabrous throughout, glaucous. Stems 5–11 dm, erect or ascending, simple or branched above. Basal leaves not rosulate; petiole 1.5–3.8 cm; blade broadly obovate to broadly ovate, sometimes oblong, 3.5–15.5 x 2.2–10 cm, margin entire or coarsely dentate-sinuate; uppermost cauline leaves short petiolate to subsessile, linear to lanceolate or oblanceolate, entire. Racemes without a terminal cluster of sterile flowers, ebracteate, densely flowered, elongated in fruit; fruiting pedicels ascending, 5–17 mm. Sepals purplish or sometimes green, ovate-oblong to lanceolate, 7.5–11 ´ 2.5–3 mm, erect, equal, not keeled; petals creamy white with purple or brown veins, 12.5–18.5 mm; blade 6–8 x 2–2.5 mm, not or hardly crisped; claw oblanceolate, 5–9 x 1.2–2 mm; filaments tetradynamous, free, median pairs 3–5 mm, lateral pair 2.5–4.5 mm; anthers narrowly oblong, 3–4.5 mm, equal; ovules 76–90 per ovary. Fruits 5.7–12.5 cm ´ 1.7–2.3 mm, divaricate to ascending, terete, often distinctly curved; valves with an obscure midvein; style obsolete or rarely to 2.5 mm; stigma strongly 2-lobed, the lobes to 0.4 mm, connivent, opposite replum. Seeds 1.4–2.1 x 0.8–1.2 mm; cotyledons entire.

Flowering: May–Jun.

Habitat: dry, steep slopes, rocky outcrops, on slate, metamorphic, or igneous substrates.

Elevation: 1300–1500 m.

Distribution: United States (Nevada/Humboldt and Pershing counties).




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