Boechera lincolnensis

Windham & Al-Shehbaz

Harvard Pap. Bot. 11: 71. 2006

Synonyms: Arabis pulchra var. munciensis M. E. Jones Boechera pulchra var. munciensis (M. E. Jones) Dorn
Treatment appears in FNA Volume 7. Treatment on page 388. Mentioned on page 351, 354, 389, 400.
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Perennials; long-lived; sexual; caudex woody. Stems usually 1 per caudex branch, arising from center of leaf tuft, elevated above ground surface on woody base, 2–4.2 dm, densely pubescent proximally, trichomes short-stalked, 3–6-rayed, 0.1–0.5 mm, similarly pubescent distally. Basal leaves: blade linear or linear-oblanceolate, 1–2 mm wide, margins entire, rarely ciliate near petiole base, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 3–8-rayed, 0.1–0.4 mm. Cauline leaves: 10–25, concealing stem proximally; blade auricles absent or, rarely, to 1 mm, surfaces of distalmost leaves densely pubescent. Racemes 7–15-flowered, usually unbranched. Fruiting pedicels divaricate-ascending, straight to slightly curved proximally, recurved distally, 10–20(–25) mm, pubescent, trichomes appressed, branched. Flowers divaricate-ascending at anthesis; sepals pubescent; petals lavender to purple, 10–12 × 2–3 mm, glabrous or sparsely pubescent (occasionally some trichomes abaxially); pollen ellipsoid. Fruits usually widely pendent to ascending, rarely horizontal, not appressed to rachis, not secund, straight, edges parallel, (3.2–)4–5.5 cm × 2–2.5 mm; valves pubescent throughout; ovules 86–120 per ovary; style 0.1–0.3 mm. Seeds biseriate, 1–1.5 × 0.7–0.9 mm; wing continuous, 0.07–0.12 mm wide. 2n = 14.

Phenology: Flowering Apr–May.
Habitat: Rocky slopes and gravelly soil with sagebrush and other shrubs
Elevation: 1400-1900 m

Discussion

Recent studies suggest that Boechera lincolnensis is a distinct species (see M. D. Windham and I. A. Al-Shehbaz 2006 for detailed comparison).

References

None.

Lower Taxa

No lower taxa listed.