Phytologia 51: 370. 1982.
Perennials; short to long-lived; sexual; caudex usually not woody (sometimes with persistent, crowded leaf-bases). Stems 1–7 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 1.5–5.5 (–8) dm, densely pubescent proximally, trichomes simple and long-stalked, 2-rayed, 0.2–0.9 mm, glabrous distally. Basal leaves: blade broadly oblanceolate, 5–15 (–20) mm wide, margins dentate, ciliate, trichomes (simple), to 1.2 mm, surfaces glabrous or pubescent, trichomes simple and long-stalked, usually 2-rayed, rarely some 3-rayed, 0.2–0.6 mm. Cauline leaves: 8–25, often concealing stem proximally; blade auricles 0.8–3 mm, surfaces of distalmost leaves often glabrous. Racemes 6–40 (–74) -flowered, usually unbranched. Fruiting pedicels horizontal to divaricate-ascending, curved or angled downward, 9–18 (–23) mm, usually glabrous, rarely sparsely pubescent, trichomes spreading, simple. Flowers ascending at anthesis; sepals sparsely hirsute; petals usually lavender, rarely white, 5–9 × 1–2 mm; pollen ellipsoid. Fruits widely pendent, not appressed to rachis, not secund, curved to nearly straight, edges parallel, 3–5.8 cm × 1.5–2 mm; valves glabrous; ovules 98–128 per ovary; style 0.2–0.5 mm. Seeds biseriate, 0.9–1.2 × 0.6–0.8 mm; wing distal (sometimes absent), 0.05–0.15 mm wide. 2n = 14.
Phenology: Flowering Apr–Jul.
Habitat: Rocky slopes in pine forests, pinyon-juniper woodlands, scrub oak
Elevation: 1800-2800 m
Ariz., Colo., Nev., N.Mex., Utah.
As circumscribed by R. C. Rollins (1993), Boechera fendleri included distinctive elements, segregated here as B. porphyrea, B. spatifolia, and B. texana (see M. D. Windham and I. A. Al-Shehbaz 2006, 2007 for detailed comparison). Boechera fendleri in the strict sense is a sexual diploid extending from the Four Corners region through northern Arizona to southern Nevada.
"elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property.