Trifolium ciliolatum |
Trifolium haydenii |
|
---|---|---|
foothill clover, tree clover |
Hayden's clover |
|
Habit | Herbs annual, 5–50 cm, glabrous or sparsely hairy. | Herbs perennial, 5–10 cm, glabrous. |
Stems | erect, branched. |
ascending, cespitose, short-branched. |
Leaves | palmate; stipules ovate-lanceolate, 1–1.5 cm, margins entire, sometimes ciliate, apex acuminate; petiole 1–13 cm; petiolules 0.5 mm; leaflets 3, blades elliptic to oblong or obovate, 0.8–3.5 × 0.5–1.5 cm, base cuneate, veins thickened, margins serrate proximally, obscurely denticulate distally, apex usually rounded or retuse, rarely acute, surfaces glabrous. |
mostly basal, palmate; stipules lanceolate, 0.4–0.8 cm, margins entire or lobed, apex acute or acuminate; petiole 1–6 cm; petiolules to 0.5 mm; leaflets 3, blades broadly ovate, 0.4–2 × 0.3–1.5 cm, base cuneate, veins thickened distally, ± straight, sometimes arching distally, 0.5+ mm apart, 5–10 pairs of primary veins, margins sharply antrorse-serrate, apex acute, short-apiculate, surfaces glabrous. |
Inflorescences | axillary or terminal, 10–30-flowered, ovoid to subglobose, 0.7–2.2 × 0.5–2 cm; involucres a narrow rim, 0.5 mm, membranous, dentate. |
terminal, 5–20-flowered, erect, globose or subglobose, 0.5–1.5 × 0.8–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres a narrow, membranous, dentate rim, 0.5 mm. |
Peduncles | 2.5–12 cm. |
straight distally, proximal to inflorescence, 5–8 cm. |
Pedicels | erect becoming reflexed, 0.5–6 mm; bracteoles linear or cup-shaped, to 1 mm. |
strongly reflexed, 1.5 mm; bracteoles broadly ovate, truncate, membranous, to 0.5 mm. |
Flowers | 6–13 mm; calyx broadly campanulate, 5–11 mm, glabrous, veins 10, tube 1–5 mm, lobes unequal, elliptic to linear, margins hyaline, dentate or pectinate, ciliate, sinuses narrow, orifice open; corolla white, pink, or purple, 5–13 mm, banner broadly ovate, 6–13 × 4–7 mm, apex rounded, apiculate. |
13–17 mm; calyx campanulate, 4.5–6.5 mm, glabrous, veins 10 (5 sometimes faint), tube 2–3 mm, lobes subequal, narrowly triangular-subulate, equaling tube, orifice open; corolla salmon, buff-pink, or pink, with white or cream tips, 13–17 mm, banner broadly elliptic-oblong, 13–17 × 6–8 mm, apex rounded, retuse or slightly apiculate. |
Legumes | short-stipitate, ovoid, 5–10 mm. |
stipitate, obovoid-oblong, 6–7 mm. |
Seeds | 1 or 2, brown, mottled, ovoid, 2.5–3 mm, smooth. |
1–4, brown, lenticular-ovoid, 2.5–3 mm, smooth. |
2n | = 16. |
= 16. |
Trifolium ciliolatum |
Trifolium haydenii |
|
Phenology | Flowering Apr–Jun. | Flowering Jun–Aug. |
Habitat | Oak-pine chaparral, meadows, roadsides. | Alpine and subalpine slopes. |
Elevation | 0–1500 m. (0–4900 ft.) | 2200–3800 m. (7200–12500 ft.) |
Distribution |
CA; OR; WA; Mexico (Baja California)
|
ID; MT; WY
|
Discussion | Trifolium ciliolatum is relatively widespread in California and is found in scattered sites in Baja California, Oregon, and Washington. Trifolium ciliatum Nuttall (1848), which pertains here, is a later homonym of T. ciliatum E. D. Clarke (1813). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium haydenii, which is found in east-central Idaho, southwestern Montana, and northwestern Wyoming, appears related to T. kingii, T. productum, and similar species (J. M. Gillett 1972) and is sometimes confused with T. latifolium (Gillett 1969), from which it differs by the absence of hairs. (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. ciliatum var. discolor | T. idahoense |
Name authority | Bentham: Pl. Hartw., 304. (1849) | Porter in F. V. Hayden: Prelim. Rep. U.S. Geol. Surv. Montana, 480. (1872) — (as haydeni) |
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