Lepidium crenatum

(Greene) Rydberg

Bull. Torrey Bot. Club 33: 141. 1906.

Basionym: Thelypodium crenatum Greene Pittonia 4: 20. 1899
Synonyms: Lepidium montanum subsp. spatulatum (B. L. Robinson) C. L. Hitchcock Lepidium montanum var. spatulatum (B. L. Robinson) C. L. Hitchcock Lepidium scopulorum var. spatulatum B. L. Robinson Lepidium vaseyanum
Treatment appears in FNA Volume 7. Treatment on page 579. Mentioned on page 573, 587.

Perennials or subshrubs; (woody base aboveground); puberulent. Stems simple from base, erect, branched distally, (2–)3–8(–11) dm. Basal leaves rosulate (on sterile shoots); petiole (1.5–)2.5–8(–10) cm; blade oblanceolate to spatulate, (2–)3–7(–9) cm × 5–23(–32) mm, margins crenate to serrate-crenate. Cauline leaves shortly petiolate or sessile; blade oblong to oblanceolate, 1–3.5 cm × 4–15 mm, base cuneate, not auriculate, margins entire. Racemes (subcorymbose panicles), slightly elongated in fruit; rachis puberulent, trichomes straight. Fruiting pedicels divaricate-ascending to horizontal, straight, (terete), 3–6(–8) × 0.2–0.25 mm, puberulent adaxially. Flowers: sepals oblong to ovate, (1–)1.3–1.8(–2) × 0.9–1.2 mm; petals white, suborbicular to broadly obovate, (1.8–)2–3 × 1.3–2 mm, claw 0.5–1 mm; stamens 6; filaments 1.4–1.6 mm, (glabrous); anthers 0.5–0.7 mm. Fruits broadly ovate, (2.5–)3–3.5(–4) × (2–)2.3–2.8 mm, apically winged, apical notch 0.1–0.2mm deep; valves thin, smooth, not veined, glabrous; style 0.2–0.6 mm, exserted beyond apical notch. Seeds ovate, 1.5–2 × 1–1.3 mm.

Phenology: Flowering Jun–Aug.
Habitat: Pinyon-juniper and brush communities, clay bluff of sandstone mesa, arroyo banks
Elevation: 1800-2000 m


Of conservation concern.

Lepidium crenatum is known from Delta, Moffatt, Montezuma, and Montrose counties in Colorado. It was reported from Utah by C. L. Hitchcock (1936) and R. C. Rollins (1993), but we have not seen any material to confirm its occurrence there.

Selected References


Lower Taxa

... more about "Lepidium crenatum"
Ihsan A. Al-Shehbaz +  and John F. Gaskin +
(Greene) Rydberg +
Thelypodium crenatum +
Colo. +  and N.Mex. +
1800-2000 m +
Pinyon-juniper and brush communities, clay bluff of sandstone mesa, arroyo banks +
Flowering Jun–Aug. +
Bull. Torrey Bot. Club +
Lepidium montanum subsp. spatulatum +, Lepidium montanum var. spatulatum +, Lepidium scopulorum var. spatulatum +  and Lepidium vaseyanum +
Lepidium crenatum +
Lepidium +
species +