Trifolium owyheense |
Trifolium brandegeei |
|
---|---|---|
Owyhee clover |
Brandegee's clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 5–15 cm, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
cespitose, short-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 broadly lanceolate, 1–1.5 cm, margins entire, apex acute-acuminate; petiole 0.6–1.2 cm; petiolules to 0.5 mm; leaflets 3, blades ovate, oblong-elliptic, or elliptic, 0.8–3 × 0.4–1.5 cm, base cuneate, veins moderately thickened, margins entire or faintly serrate, apex acute to rounded or minutely apiculate, surfaces glabrous. |
Inflorescences | terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
terminal, 4–15-flowered, ovoid-ellipsoid, 2.5–4 × 2.2–3 cm, rachis prolonged ca. 10 mm beyond distalmost flower; involucres absent. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
6–20 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
strongly reflexed, 1–2 mm; bracteoles linear, 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. |
15–18 mm; calyx whitish, campanulate, 7–10 mm, sparsely pubescent, veins 10, tube 4–5 mm, lobes subequal, longer than tube, narrowly triangular, acuminate, orifice open; corolla purple to magenta, 15–18 mm, banner broadly ovate, 15–17 × 7–9 mm, apex obtuse or retuse. |
Legumes | ellipsoid, 4–5 mm. |
oblong, 6.5–7 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1–3, yellow and red, flattened ovoid, 2–2.5 mm, smooth. |
2n | = 16. |
|
Trifolium owyheense |
Trifolium brandegeei |
|
Phenology | Flowering May–Jun. | Flowering Jul–Aug. |
Habitat | Dry shale hillsides on diatomaceous earth. | Open montane forests and subalpine areas. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 3500–3700 m. (11500–12100 ft.) |
Distribution |
ID; OR
|
CO; NM
|
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.) |
A close relationship between Trifolium brandegeei and T. parryi was hypothesized by J. M. Gillett (1965); this has not been borne out by flavonoid chemosystematics (E. V. Parups et al. 1966) or DNA analyses (N. W. Ellison et al. 2006). (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 | ||
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | S. Watson: Proc. Amer. Acad. Arts 11: 130. (1876) — (as brandegei) |
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