Thelypodium repandum

Biennials or perennials; (short-lived); distinctly glaucous throughout, glabrous. Stems usually branched distally, 1–4.4(–6) dm. Basal leaves (and proximal cauline): petiole 1–4(–6) cm; blade (fleshy), usually ovate or obovate, rarely orbicular or spatulate, (2.2–)4–10.5(–14) cm × (10–)15–43(–55) mm, margins usually lyrate, sinuate and repand, or dentate, rarely entire. Cauline leaves shortly petiolate; blade lanceolate or elliptic, much smaller than basal, margins entire or repand. Racemes somewhat lax, slightly elongated in fruit. Fruiting pedicels divaricate to divaricate-ascending, straight or incurved, slender, 4–12(–15) mm, slightly flattened at base. Flowers: sepals spreading to reflexed, oblong, (2.5–)3–4 × (0.8–)1–1.5(–1.8) mm; petals purple or lavender, usually oblanceolate, rarely spatulate, (2.5–)3–4.5 × 0.5–1 mm, margins not crisped, claw differentiated from blade; nectar glands confluent; filaments subequal, 2.5–3.8 mm; anthers oblong, 1–1.8 mm; gynophore 0.5–0.8(–1) mm. Fruits usually erect to ascending, rarely divaricate, torulose, straight or, sometimes, incurved, flattened, (2–)4–7.4 cm × 1–1.5(–1.8) mm, (replum not constricted between seeds); ovules 32–44 per ovary; style subclavate, 0.5–1.2(–1.5) mm. Seeds (0.7–)1–1.5 × 0.5–0.8 mm.

Phenology: Flowering Jun.
Habitat: Decomposing shale banks
Elevation: ca. 1700 m

Idaho.

Discussion

Thelypodium repandum is known from the shale banks of the Salmon River and its tributaries in Custer County.

Selected References

None.

Lower Taxa