Trifolium owyheense |
Trifolium jokerstii |
|
---|---|---|
Owyhee clover |
Butte County golden clover, Jim's clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs annual, 5–20 cm, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
erect-ascending, simple or cespitose, branched or unbranched. |
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-lanceolate, 0.8–2 cm, margins toothed, apex rounded to acute; petiole 1–9 cm; petiolules 0.5 mm; leaflets 3, blades elliptic to obovate, 0.5–3.2 × 0.4–1.5 cm, base cuneate, veins fine to slightly thickened, margins usually serrulate, rarely nearly lobed, teeth shortly aristate, apex usually acute or obtuse, rarely emarginate, surfaces glabrous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
axillary or terminal, 10–30-flowered, subglobose, 1.2–3 × 1.2–3 cm; involucres widely campanulate to nearly flat, 6–11 mm. |
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. |
10–16 mm; calyx campanulate, inflated in fruit, 7–9 mm, sparsely pubescent, veins 5, tube 3.5–4.5 mm, lobes unequal, abaxial and lateral 2- or 3-fid, adaxial unbranched, segments plumose, apex setaceous, orifice open; corolla yellow, 10–15 mm, banner broadly ovate, proximally inflated in fruit, distally narrowed into twisted tip, 10–15 × 3–5 mm, apex obtuse, truncate, or emarginate-apiculate. |
Legumes | ellipsoid, 4–5 mm. |
stipitate, ovoid, 3.3–3.5 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1 or 2, dark brown, ellipsoid to mitten-shaped, 3.1–3.4 mm, rugose. |
Trifolium owyheense |
Trifolium jokerstii |
|
Phenology | Flowering May–Jun. | Flowering Mar–May. |
Habitat | Dry shale hillsides on diatomaceous earth. | Wet meadows, streamsides. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 300–400 m. (1000–1300 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 jokerstii is known only from Butte County, from Table Mountain and along a stream adjacent to it (M. A. Vincent and R. Morgan 1998). (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) | Vincent & Rand. Morgan: Novon 8: 91, fig. 1. (1998) |
Web links |