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Published In: Phytologia 51(6): 370. 1982. (Phytologia) Name publication detailView in Biodiversity Heritage Library

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

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32. Boechera fernaldiana (Rollins) W. A. Weber, Phytologia 51: 370. 1982.

     Plants long-lived, cespitose perennials, with somewhat woody caudices, occasionally with crowded, persistent leaf bases; sexual, with ellipsoid pollen. Stems usually 1 per caudex branch, slightly elevated on woody bases or arising near ground surface from center of basal rosettes, 1.0–3.8 dm, lower parts with many, short-stalked, 4–8-rayed trichomes 0.04–0.10 mm, these sometimes mixed with stalked 2-rayed trichomes to 0.5 mm, upper parts usually sparsely pubescent. Leaves at stem bases narrowly oblanceolate, 1–4 mm wide, entire, ciliate along petioles with simple trichomes to 1 mm, blade surfaces densely pubescent with short-stalked, 4–8-rayed trichomes 0.04–0.10 mm; cauline leaves 5–10, not concealing stem, the uppermost usually sparsely pubescent, with auricles 0.3–2.0 mm. Inflorescences mostly unbranched, 10–20-flowered; fruiting pedicels 5–20 mm, divaricate-ascending, straight, with a few appressed, branched trichomes. Flowers ascending at anthesis; sepals glabrous to sparsely pubescent; petals white or purple, 7–12 ´ 1.5–4.0 mm, glabrous; ovules 30–72 per fruit. Fruits 3.5–6.5(–7.5) cm ´ 1.0–1.6 mm, divaricate-ascending, not appressed to rachises, not secund, straight or curved, with parallel edges, glabrous; style 0.1–1.0 mm. Seeds uniseriate, 1.0–1.2 ´ 0.8–1.0 mm; wing continuous, ca. 0.1 mm wide.

Flowering: April–Jul.

Habitat: igneous and sandstone rock outcrops, talus, and rocky slopes, sagebrush and pinyon-juniper woodlands.

Elevation: 1500–3350 m.

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

Reproductive mode: sexual diploid.

     Two subspecies: w U.S.A.



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                                Key to the subspecies of Boechera fernaldiana

1. Petals purple to lavender; sepals purplish, moderately to sparsely pubescent; Nevada ................32a. subsp. fernaldiana

1. Petals white; sepals greenish, glabrous or rarely sparsely pubescent; Colorado and Utah..............32b. subsp. vivariensis




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