Trifolium owyheense |
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Owyhee clover |
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Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
Leaves | palmate; stipules broadly obovate, 1–2 cm, fused at base, margins slightly lobed, apex acute; petiole 2–6 cm; petiolules 1–1.5 mm; leaflets 3, blades ovate, obovate, or orbiculate, slightly overlapping, 1–2 × 0.7–2.3 cm, base truncate to rounded, veins prominent, margins sparsely dentate, apex rounded, emarginate, surfaces glabrous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
Flowers | 15–21 mm; calyx tubular-campanulate, 9–12 mm, pilose, veins 10, tube 4.5–6 mm, lobes subequal, abaxialmost longest, subulate, orifice open; corolla deep pink or magenta, 20–23 mm, banner tubular for most their length, 18–22 × 5–7 mm, apex flared. |
Legumes | ellipsoid, 4–5 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
Trifolium owyheense |
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Phenology | Flowering May–Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. |
Elevation | 1000–2000 m. (3300–6600 ft.) |
Distribution |
ID; OR
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Discussion | Trifolium owyheense is known from about 40 populations in a small portion of east-central Malheur County in Oregon, and immediately adjacent Owyhee County in Idaho (M. Mancuso 2001). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium |
Sibling taxa | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) |
Web links |