Trifolium owyheense |
Trifolium grayi |
|
---|---|---|
Owyhee clover |
andrews' clover, Gray's clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs annual, 10–40 cm, densely pubescent or glabrate. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
erect, 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, 0.5–1.5 cm, margins toothed or lacerate, apex acute-acuminate; petiole 1–15 cm; petiolules 1 mm; leaflets 3, blades elliptic, oblanceolate, or obovate, 2–2.5 × 1–1.5 cm, base cuneate, veins fine, margins dentate-serrate to crenulate, teeth shortly aristate, apex obtuse or broadly acute, surfaces pubescent or glabrate. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
axillary or terminal, 5–30-flowered, subglobose or globose, 1.8–3 × 2–3 cm; involucres bowl-shaped, 10–25 mm, lobes 6–16, sharply setaceous-toothed, sinuses shallow. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
2–15 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
straight, 0.5 mm; 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, 6–13 mm, pubescent, veins 5, tube 3–5 mm, lobes unequal, setaceous, abaxial inconspicuously 2- or 3-fid, adaxial unbranched, segments plumose, orifice open; corolla usually lavender or purple, sometimes purple with white tips, 8–16 mm, banner oblong, proximally inflated in fruit, distally narrowed into twisted tip, 3–5 × 10–13 mm, apex obtuse, truncate, or emarginate. |
Legumes | ellipsoid, 4–5 mm. |
stipitate, ovoid-ellipsoid, 2.5–4 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1 or 2, pale brown, mottled, ellipsoid to mitten-shaped, 1.6–2 mm, rugose. |
Trifolium owyheense |
Trifolium grayi |
|
Phenology | Flowering May–Jun. | Flowering Apr–Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. | Wet meadows, foothill slopes, pine woodlands. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 0–600 m. (0–2000 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 grayi, which ranges from San Luis Obispo County in the south to Mendocino County in the north, and eastward into Amador, Sacramento, and Tuolumne counties, has long been considered a variety of T. barbigerum and some authors claim that intermediates between the two species are encountered (J. S. Martin 1943; D. Isely 1998); others state that the two taxa are distinct (L. F. McDermott 1910; M. A Vincent and R. Morgan 1998). Trifolium andrewsii (A. Gray) A. Heller is an illegitimate superfluous name that pertains here. (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 | ||
Synonyms | T. barbigerum var. andrewsii, T. barbigerum var. lilacinum, T. lilacinum | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | Lojacono: Nuovo Giorn. Bot. Ital. 15: 189. (1883) |
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