Trifolium lemmonii |
Trifolium gracilentum |
|
---|---|---|
Lemmon's clover |
pin point clover, slender clover |
|
Habit | Herbs perennial, subcaulescent, 10–20 cm, appressed-pubescent. | Herbs annual, 2–60 cm, glabrous. |
Stems | cespitose, branched. |
erect or ascending, branched. |
Leaves | 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. |
palmate; stipules ovate-lanceolate, 0.5–2.5 cm, membranous, margins entire or slightly serrate, apex long-acuminate; petiole 0.5–9 cm; petiolules to 0.5 mm; leaflets 3, blades obovate to obcordate, 0.5–2.5 × 0.2–1.5 cm, base cuneate, veins moderately thickened, margins setose-serrulate, apex rounded, shallowly retuse, surfaces glabrous. |
Inflorescences | terminal or axillary, 15–30-flowered, globose to subglobose, 2–3 × 2–3 cm; involucres a narrow membranous, dentate rim, to 0.2 mm. |
axillary or terminal, 10–25-flowered, globose to subglobose, 0.5–2 × 0.5–2 cm, rachis prolonged beyond flowers; involucres a narrow, membranous, dentate rim, to 0.5 mm. |
Peduncles | sharply bent distally, just below flowers, 5–15 cm, surpassing leaves. |
1–9 cm. |
Pedicels | reflexed in fruit, 2–3 mm; bracteoles minute, cuplike, membranous, minute. |
becoming dramatically reflexed, 3–4 mm; bracteoles low, cuplike, membranous, to 0.5 mm. |
Flowers | 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. |
5–7.5 mm; calyx narrowly campanulate, 4.5–6.5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes unequal, long-triangular, margins green or purple, orifice open; corolla white, pink, or purple, 5–8 mm, banner ovate, 5–8 × 3–4 mm, apex broadly rounded, retuse or apiculate. |
Legumes | oblong, 3.2–3.5 mm. |
ovoid-ellipsoid, 4–6 mm. |
Seeds | 1, dark brown, ellipsoid, 2.5–3 mm, smooth. |
1 or 2, tan to brown, mitten-shaped, 1.1–1.5 mm, smooth. |
2n | = 16. |
|
Trifolium lemmonii |
Trifolium gracilentum |
|
Phenology | Flowering Jul–Aug. | Flowering Mar–Jun. |
Habitat | Dry, rocky soils, roadsides. | Open, grassy areas, gravelly ridges, roadsides, adobe slopes, moist places. |
Elevation | 1500–2500 m. (4900–8200 ft.) | 50–1200 m. (200–3900 ft.) |
Distribution |
CA; NV
|
AZ; CA; NV; OR; WA; Mexico (Baja California)
|
Discussion | 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.) |
Abundance of Trifolium gracilentum increases in response to burns (J. M. DiTomaso et al. 1999). The record of Trifolium gracilentum from South Carolina is a waif. (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 | T. denudatum, T. exile, T. gracilentum var. exile, T. gracilentum var. inconspicuum, T. gracilentum var. reductum, T. inconspicuum |
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 127. (1876) — (as lemmoni) | Torrey & A. Gray: Fl. N. Amer. 1: 316. (1838) |
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