Trifolium owyheense |
Trifolium bolanderi |
|
---|---|---|
Owyhee clover |
Bolander's clover, parasol clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 15–30 cm, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
ascending, cespitose, branched. |
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. |
palmate; stipules ovate or lanceolate, 0.6–1.5 cm, margins entire, apex acute; petiole 1–7 cm; petiolules to 1 mm; leaflets 3, blades obcordate, obovate, or elliptic, 1–1.9 × 0.5–1.1 cm, base cuneate, veins fine to slightly thickened, margins setose, apex obtuse, rounded, or emarginate, apiculate, surfaces glabrous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal, 12–30-flowered, ovoid, 1–2 × 1.5–3 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
slender, bent distally, just below flowers, 5–20 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
strongly reflexed, 1–1.2 mm; bracteoles minute, cuplike. |
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. |
12–14 mm; calyx deep violet, campanulate, gibbous, 3–5 mm, glabrous, veins 5, tube 1.5–2 mm, lobes unequal, triangular-subulate, orifice open; corolla lavender to purplish, 11–12 mm, banner curved, oblanceolate, 10–12 × 3–4 mm, apex narrow, rounded, slightly emarginate. |
Legumes | ellipsoid, 4–5 mm. |
ellipsoid, 3–4 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1 or 2, brown, ellipsoid, 1.2–1.5 mm, smooth. |
Trifolium owyheense |
Trifolium bolanderi |
|
Phenology | Flowering May–Jun. | Flowering Jun–Aug. |
Habitat | Dry shale hillsides on diatomaceous earth. | Meadows. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 2000–2300 m. (6600–7500 ft.) |
Distribution |
ID; OR
|
CA |
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.) |
Trifolium bolanderi is known from the Sierra Nevada in California and may be vulnerable to shifts in climate patterns. Genetic diversity of populations of the species (based on allozyme patterns) was found to be relatively high; two genetically distinct groups of populations are known (R. G. Denton 2002). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium |
Sibling taxa | ||
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | A. Gray: Proc. Amer. Acad. Arts 7: 335. (1868) |
Web links |