Herbs perennial, 5–10 cm, gla­brous. Stems ascending, cespi­tose, short-branched. Leaves mostly basal, palmate; stipules lanceolate, 0.4–0.8 cm, margins entire or lobed, apex acute or acuminate; petiole 1–6 cm; petio­lules to 0.5 mm; leaflets 3, blades broadly ovate, 0.4–2 × 0.3–1.5 cm, base cuneate, veins thickened dis­tally, ± straight, sometimes arching distally, 0.5+ mm apart, 5–10 pairs of primary veins, margins sharply antrorse-serrate, apex acute, short-apiculate, surfaces glabrous. Peduncles straight distally, proximal to inflo­rescence, 5–8 cm. Inflorescences terminal, 5–20-flowered, erect, globose or subglobose, 0.5–1.5 × 0.8–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres a narrow, membranous, dentate rim, 0.5 mm. Pedicels strongly reflexed, 1.5 mm; bracteoles broadly ovate, truncate, membranous, to 0.5 mm. Flowers 13–17 mm; calyx campanulate, 4.5–6.5 mm, glabrous, veins 10 (5 sometimes faint), tube 2–3 mm, lobes subequal, narrowly triangular-subulate, equaling tube, orifice open; corolla salmon, buff-pink, or pink, with white or cream tips, 13–17 mm, banner broadly elliptic-oblong, 13–17 × 6–8 mm, apex rounded, retuse or slightly apiculate. Legumes stipitate, obovoid-oblong, 6–7 mm. Seeds 1–4, brown, lenticular-ovoid, 2.5–3 mm, smooth. 2n = 16.

Phenology: Flowering Jun–Aug.
Habitat: Alpine and subalpine slopes.
Elevation: 2200–3800 m.

Distribution

• Generated Map
• Legacy Map

Idaho, Mont., Wyo.

Discussion

Trifolium haydenii, which is found in east-central Idaho, southwestern Montana, and northwestern Wyoming, appears related to T. kingii, T. productum, and similar species (J. M. Gillett 1972) and is sometimes confused with T. latifolium (Gillett 1969), from which it differs by the absence of hairs.

Selected References

None.

Lower Taxa

None.