Trifolium owyheense |
Trifolium lemmonii |
|
---|---|---|
Owyhee clover |
Lemmon's clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, subcaulescent, 10–20 cm, appressed-pubescent. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
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 to lanceolate, 0.8–1 cm, margins irregularly lobed, apex acuminate; petiole 1–16.5 cm; petiolules 0.5 mm; leaflets 3–7, blades obovate or elliptic, 0.9–1.9 × 0.5–0.8 cm, base cuneate, veins prominent abaxially, margins coarsely dentate, apex rounded, acute, or mucronate, surfaces strigose. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal or axillary, 15–30-flowered, globose to subglobose, 2–3 × 2–3 cm; involucres a narrow membranous, dentate rim, to 0.2 mm. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
sharply bent distally, just below flowers, 5–15 cm, surpassing leaves. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
reflexed in fruit, 2–3 mm; bracteoles minute, cuplike, membranous, 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. |
11–13 mm; calyx purple, campanulate, 3–5 mm, slightly pilose, veins 5 (obscure), tube 2–2.5 mm, lobes subequal, subulate, orifice open; corolla white to pink, 10–12 mm, banner oblong-obovate, 10–12 × 4–5 mm, apex rounded, emarginate. |
Legumes | ellipsoid, 4–5 mm. |
oblong, 3.2–3.5 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1, dark brown, ellipsoid, 2.5–3 mm, smooth. |
Trifolium owyheense |
Trifolium lemmonii |
|
Phenology | Flowering May–Jun. | Flowering Jul–Aug. |
Habitat | Dry shale hillsides on diatomaceous earth. | Dry, rocky soils, roadsides. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 1500–2500 m. (4900–8200 ft.) |
Distribution |
ID; OR
|
CA; NV
|
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.) |
Populations of Trifolium lemmonii studied by S. J. Sommer (1999) fall into two groups, east (in Sierra County, California, and Washoe County, Nevada) and west (in Plumas County, California) of a gap where no suitable habitat is known; gene flow between these two regions appears to be limited. (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 | Lupinaster lemmonii | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | S. Watson: Proc. Amer. Acad. Arts 11: 127. (1876) — (as lemmoni) |
Web links |