Trifolium owyheense |
Trifolium andinum |
|
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Owyhee clover |
Great Divide clover, intermountain clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 5–15 cm, pubescent. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
erect or ascending, cespitose, much-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 oblanceolate, 0.5–1.4 cm, margins entire, apex acute-acuminate; petiole 0.5–4 cm; petiolules to 0.1 mm; leaflets 3, blades oblanceolate, often folded, 0.4–1.5 × 0.2–0.4 cm, base cuneate, veins obscure, margins subentire to denticulate distally, apex acute, mucronulate, surfaces villous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal, usually formed of 2 sessile heads, 15–25-flowered, globose, 0.8–2 × 0.6–1.5 cm; involucres absent, distal stipules and leaves sometimes forming involucrelike structure. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
between distal leaves or involucrelike structure and inflorescences 0.5–6 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
straight, (0–)1–2 mm; bracteoles broadly ovate, truncate, membranous, to 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. |
10–15 mm; calyx tubular-campanulate, 6–9 mm, rough-hairy or glabrous, veins 10, tube 3–6 mm, lobes subequal, subulate, orifice open; corolla light purple, 10–15 mm, banner oblong, 9–13 × 3–4 mm, apex rounded or truncate; ovaries pubescent distally. |
Legumes | ellipsoid, 4–5 mm. |
ellipsoid, 4–5 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1 or 2, brown, ovoid, 1.5–2 mm, smooth. |
Trifolium owyheense |
Trifolium andinum |
|
Phenology | Flowering May–Jun. | Flowering May–Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. | Shale or clay bluffs and hilltops, crevices of volcanic or limestone rock, pinyon-juniper belt. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 1600–2300 m. (5200–7500 ft.) |
Distribution |
ID; OR
|
AZ; CO; NM; NV; UT; WY
|
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 andinum ranges from central and southern Nevada into west-central Utah, north-central Arizona to southeastern Utah, north-central New Mexico, and northeastern Utah into southwestern Wyoming. Differentiation of T. andinum into subspecific taxa proved impossible, since no consistent gaps in morphological traits could be found. (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. andinum var. canone, T. andinum var. navajoense, T. andinum var. podocephalum, T. andinum var. wahwahense | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 314. (1838) |
Web links |