Trifolium owyheense |
Trifolium dedeckerae |
|
---|---|---|
Owyhee clover |
Dedecker's clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 20–25 cm, glabrous. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
± erect, loosely 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. |
basal and cauline, palmate; stipules ovate, 1.1–1.5 cm, margins entire, apex acuminate-subulate; petiole 5–15 cm; petiolules absent; leaflets 3, blades lanceolate to linear, 2–4 × 0.1–0.6 cm, base cuneate, veins prominent, margins remotely serrate, apex acute, surfaces 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, 10–18-flowered, ellipsoid to subglobose, 1.8–2.2 × 2.3–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 3–7 cm, surpassing subtending leaves. |
7–16 cm, slightly twisted apically. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
strongly reflexed in fruit, 0.5 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. |
13–15 mm; calyx tubular-campanulate, 6–8.5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes unequal, triangular-subulate, orifice open; corolla pink to purple, 15 mm, banner oblong, 14–16 × 6–7 mm, apex acute or apiculate. |
Legumes | ellipsoid, 4–5 mm. |
ellipsoid, 5 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
1 or 2, brown, flattened ovoid, 2 mm, smooth. |
Trifolium owyheense |
Trifolium dedeckerae |
|
Phenology | Flowering May–Jun. | Flowering May–Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. | Rock crevices, dry slopes. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 2100–3400 m. (6900–11200 ft.) |
Distribution |
ID; OR
|
CA |
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 dedeckerae is known from Inyo, Kern, Mono, and Tulare counties. It is similar to T. macilentum and T. productum, from which it differs by its much narrower leaflets (J. M. Gillett 1972). (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. dedeckerae, T. macilentum var. dedeckerae | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | J. M. Gillett: Madroño 21: 451, fig. 1. (1972) |
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