Trifolium owyheense |
Trifolium beckwithii |
|
---|---|---|
Owyhee clover |
Beckwith's clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 5–50 cm, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
erect or ascending, unbranched or several stems clumped from crown. |
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 narrowly ovate, lanceolate, or linear-lanceolate, 1–2 cm, margins entire or toothed, apex acute; petiole 0.5–20 cm; petiolules 1 mm; leaflets 3, blades usually rhombic, oblong, or elliptic, sometimes ovate, 2.5–5 × 0.6–2 cm, base cuneate, veins slightly thickened, margins setose-serrulate, apex obtuse or retuse, surfaces glaucous abaxially, glabrous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal or axillary, 30–70+-flowered, globose or ovoid becoming subglobose, 1.5–4 × 1.8–3.3 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
straight, thick, 5–25 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
strongly reflexed in fruit, 1–1.5 mm; bracteoles minute. |
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. |
11–14 mm, sweetly fragrant; calyx campanulate, gibbous, 4–6 mm, glabrous, veins 5, tube 2–3 mm, lobes unequal, narrowly triangular or subulate, orifice open; corolla light purplish, sometimes with pink tips, 10–13 mm, banner straight, obovate to broadly elliptic, 13–18 × 6–8 mm, apex rounded or retuse, apiculate. |
Legumes | ellipsoid, 4–5 mm. |
oblong, 5 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
2–4, reddish brown, flattened globose, 1.5–2 mm, smooth. |
2n | = 48. |
|
Trifolium owyheense |
Trifolium beckwithii |
|
Phenology | Flowering May–Jun. | Flowering May–Jul. |
Habitat | Dry shale hillsides on diatomaceous earth. | Moist, grassy meadows along streams. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 1200–2000 m. (3900–6600 ft.) |
Distribution |
ID; OR
|
CA; ID; MT; NV; OR; SD; UT; WA
|
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.) |
Disjunct populations of Trifolium beckwithii found in South Dakota are over 1200 km east of the nearest populations in Montana. The South Dakota populations appear to have been long-distance introductions from populations in northern California, based on molecular data (M. R. Duvall et al. 1999). (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) | Brewer ex S. Watson: Proc. Amer. Acad. Arts 11: 128. (1876) |
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