Trifolium owyheense |
Trifolium hirtum |
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Owyhee clover |
rose clover |
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Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs annual, 10–35 cm, densely spreading-hairy. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
curved-ascending, 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 lanceolate-ovate, 0.8–1.8 cm, margins entire, apex long-setaceous; petiole 0.5–5 cm; petiolules 0.5 mm; leaflets 3, blades obovate to oblong, 0.8–2.5 × 0.5–1.3 cm, base cuneate, veins prominent, closely-spaced, margins denticulate distally, apex rounded, surfaces densely spreading-hairy. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal on branches, 10–50-flowered, globose or ovoid, disarticulating in fruit, 1.5–2.5 × 1.5–2.5 cm; involucres absent, involucrelike structures formed by enlarged stipules. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
absent. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
absent; bracteoles absent. |
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. |
10–17 mm; calyx campanulate, 7–11 mm, pilose, veins 20, tube 2–5 mm, lobes subequal, abaxial slightly longer, orifice hairy, open; corolla purplish red, 10–14 mm, banner lanceolate, 10–14 × 1–2 mm, apex acute-acuminate. |
Legumes | ellipsoid, 4–5 mm. |
ovoid, leathery distally, transversely dehiscent, 2–3 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1, tan or brown, globose-ellipsoid, 1.5–2 mm, smooth, glossy. |
2n | = 10. |
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Trifolium owyheense |
Trifolium hirtum |
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Phenology | Flowering May–Jun. | Flowering Apr–Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. | Fields, roadsides. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 0–2100 m. (0–6900 ft.) |
Distribution |
ID; OR
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AL; CA; FL; LA; NC; OR; TN; VA; s Europe; w Asia; n Africa [Introduced in North America; introduced also in s Africa, Pacific Islands (New Zealand), Australia]
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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.) |
Trifolium hirtum was first cultivated in California in the 1940s as a forage plant and as a nitrogen source in roadside grass plantings (R. M. Love 1985); it is now widespread in that state. It was reported for Kentucky by D. Isely (1998); no non-cultivated specimens have been seen from that state (M. A. Vincent 2001). (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) | Allioni: Auct. Fl. Pedem., 20. (1789) |
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