Herbs perennial, 3–5 cm, mostly glabrous. Stems densely mat-forming, short-branched. Leaves palmate; stipules ovate or lanceolate, 0.5–1 cm, margins entire or lobed, apex acute or acuminate; petiole 0.3–30 cm, pubescent; petiolules 0.2 mm; leaflets 3, blades oblanceolate, 0.3–1.6 × 0.1–0.7 cm, base cuneate, veins close-set, 12–18 pairs of primary veins, 0.5 mm apart, margins sharply antrorsely serrate, apex acute, long-apiculate, surfaces usually glabrous, rarely midvein pubescent abaxially. Peduncles 0.5–3.5 cm, pubescent. Inflorescences terminal, 8–18-flowered, globose or subglobose, 1.2–2.5 × 2–3 cm; involucres absent. Pedicels reflexed, 2–3.5 mm, pubescent; brac­teoles broad, membranous, to 0.2 mm. Flowers 8–13 mm; calyx campanulate, 4–6 mm, pubescent, veins 5–10, tube 1.5–2.5 mm, lobes subequal, narrowly triangular-subulate, orifice open; corolla creamy white, 8–13 mm, banner broadly elliptic-oblong, 10–13 × 6–8 mm, apex rounded, slightly apiculate. Legumes stipitate, flattened, ovoid, 2–3.5 mm. Seeds 1, yellow, mottled, flattened-ovoid, 2 mm, smooth.

Phenology: Flowering Jun.
Habitat: Sandstone ledges and outcrops.
Elevation: 1700–2100 m.

Distribution

• Generated Map
• Legacy Map

Wyo.

Discussion

Trifolium barnebyi is known from central Wyoming. It was originally described as a variety of T. haydenii, but was elevated to species rank based on its pubescent petioles, pedicels, and peduncles, closely spaced leaflet veins, and more elongate leaflets that are two times as long as wide.

Selected References

None.

Lower Taxa

None.