Trifolium owyheense |
Trifolium rollinsii |
|
---|---|---|
Owyhee clover |
Rollins' clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 5–20 cm, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
ascending, 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. |
mostly basal, palmate; stipules ovate, 1 cm, margins entire, apex blunt; petiole 2–6 cm; petiolules to 1 mm; leaflets 3, blades obovate or rhombic, 0.6–1.3 × 0.6–1 cm, base cuneate, veins prominent, margins denticulate, apex rounded or retuse, apiculate, surfaces pale abaxially, glabrous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal or axillary, 8–15-flowered, appearing turned to one side, obconic, 1.3–1.8 × 1.1–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
curved distally proximal to flowers, 3–9 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
reflexed, 1–1.2 mm; bracteoles 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. |
10–13 mm; calyx purple, campanulate, 5–6 mm, glabrous, veins 10, tube 3.5 mm, lobes equal, subulate, 2 mm, orifice open; corolla purple, often with white tips, 15 mm, banner obovate, 11–13 × 5–6 mm, apex flared. |
Legumes | ellipsoid, 4–5 mm. |
not seen. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
not seen. |
Trifolium owyheense |
Trifolium rollinsii |
|
Phenology | Flowering May–Jun. | Flowering Jun–Aug. |
Habitat | Dry shale hillsides on diatomaceous earth. | Wind-swept alpine areas. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 3000–3100 m. (9800–10200 ft.) |
Distribution |
ID; OR
|
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.) |
Trifolium rollinsii is known from the Toiyabe Range in Lander and Nye counties in central Nevada. (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. kingii subsp. rollinsii, T. macilentum var. rollinsii | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | J. M. Gillett: Madroño 21: 453, fig. 2. (1972) |
Web links |