Trifolium owyheense |
Trifolium carolinianum |
|
---|---|---|
Owyhee clover |
Carolina clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs annual, 5–30 cm, pilose. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
prostrate, ascending, or 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, 0.6–1 cm, margins entire or serrate, apex acuminate; petiole 2–5 cm; petiolules 1 mm; leaflets 3, blades obovate, 0.6–1.4 × 0.3–1.1 cm, base cuneate, veins moderately thickened, margins denticulate, apex rounded, sometimes retuse, surfaces glabrous except on veins abaxially. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
axillary or terminal, 5–40-flowered, globose, 1–2 × 1–2 cm; involucres minute. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
± geniculate proximal to flowers, inflorescence appearing sideways or inverted, 3.5–10 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
reflexed, 2–3 mm; bracteoles ovate or lanceolate, 0.5 mm. |
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. |
4.5–7 mm; calyx usually pink to magenta, campanulate, bilabiate, 3–4 mm, pilose, veins 5, slightly branched in lobes, tube 0.8–1 mm, lobes unequal, abaxial 3 lanceolate or linear, 0.8–1 mm, villous, adaxial 2 broadly triangular, 2.5–3 mm, orifice open; corolla creamy white, often pink-tinged, darkening in age, 4–4.5 mm, banner broadly ovate-rhombic, 4–4.5 × 3.8–4 mm, apex rounded, slightly erose. |
Legumes | ellipsoid, 4–5 mm. |
oblong, 3–4 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
2–4, yellow-brown to brown, globose to mitten-shaped, 1.1–1.6 mm, rugose. |
2n | = 16. |
|
Trifolium owyheense |
Trifolium carolinianum |
|
Phenology | Flowering May–Jun. | Flowering Apr–Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. | Sandy soils in dry fields, lawns, open woods, disturbed ground, rocky slopes. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 0–400 m. (0–1300 ft.) |
Distribution |
ID; OR
|
AL; AR; DE; FL; GA; KS; LA; MO; MS; NC; OK; PA; SC; TX; VA
|
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 arvense Walter (1788), a later homonym of T. arvense Linnaeus (1753), was considered a synonym of T. carolinianum by M. Zohary and D. Heller (1984). Trifolium repens Walter (1788, not Linnaeus 1753) is likely also a synonym of T. carolinianum. The record of the species from Vermont 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 | Amoria caroliniana, T. oxypetalum, T. umbellatum | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | Michaux: Fl. Bor.-Amer. 2: 58. (1803) |
Web links |