Trifolium macrocephalum |
Trifolium kingii |
|
---|---|---|
big-head clover, large-head clover |
King's clover |
|
Habit | Herbs perennial, 5–25 cm, villous. | Herbs perennial, 2–40 cm, glabrous. |
Stems | erect or ascending, branched. |
erect or ascending, branched from root stock. |
Leaves | palmate; stipules ovate, obovate, or oblong, 1–3 cm, margins entire, irregularly lobed, or serrate, apex acute or acuminate; petiole 1–14 cm; petiolules 0.9–1.2 mm; leaflets (5–)7–9, blades broadly to narrowly obovate, often folded, 1–2.7 × 0.4–1.1 cm, base cuneate, veins thickened, especially distally, margins serrulate, apex rounded or truncate, apiculate, surfaces villous abaxially, sparsely villous to glabrate adaxially. |
palmate; stipules lanceolate, 0.8–3 cm, margins entire, apex acuminate; petiole 0.8–15 cm; petiolules 1 mm; leaflets 3, blades ovate, elliptic, or lanceolate, 0.5–8 × 0.4–2.6 cm, basal blades thick, base cuneate, veins prominent, margins sharply serrate, those of basal leaves entire, sometimes shortly setose, apex acute, obtuse, or obcordate, surfaces glabrous. |
Inflorescences | terminal, 20–32-flowered, globose or ovoid-ellipsoid, 2.5–8 × 3–7 cm; involucres absent. |
terminal or axillary, 20–35-flowered, inverted or horizontal, depressed-globose or obovoid, 1.5–3.2 × 1.5–3 cm, rachis internodes not especially elongated; involucres absent. |
Peduncles | 2–8 cm. |
curved apically, 3–14 cm. |
Pedicels | erect, 1–1.5 mm; bracteoles broadly ovate, membranous, to 0.5 mm, truncate. |
reflexed, 0.5 mm; bracteoles broadly ovate, blunt, minute. |
Flowers | 20–30 mm; calyx campanulate, 10–22 mm, villous, veins 10–15, tube 2.5–4 mm, lobes subequal, subulate, plumose, orifice open; corolla white, creamy white, or pinkish, keel petals deep pink, 20–28 mm, banner ovate or oblong, 20–28 × 10–13 mm, apex rounded or slightly emarginate. |
12–16 mm; calyx campanulate, 5–6 mm, usually sparsely pubescent, sometimes glabrate, veins 5, tube 2–3.5 mm, lobes equal, 1–1.5 times tube, subulate, curved, orifice open; corolla usually pink-purple, rarely white, 13–15 mm, banner lanceolate-ovate, 15–18 × 4–5 mm, apex rounded; ovaries glabrous. |
Legumes | ovoid, 4–5 mm. |
flattened, ellipsoid, 3–4 mm. |
Seeds | 1 or 2, yellow or reddish, mitten-shaped to ellipsoid, 2.5–3 mm, smooth. |
1–3, brown, flattened ovoid, 2–2.2 mm, smooth. |
2n | = 32, 48. |
= 16. |
Trifolium macrocephalum |
Trifolium kingii |
|
Phenology | Flowering Apr–Jun. | Flowering Jul–Aug. |
Habitat | Rocky places, hard, compacted clay-gumbo, lava beds, sage-covered slopes, full sun. | Alpine meadows, stream banks, open aspen and spruce-fir woods. |
Elevation | 80–2500 m. [260–8200 ft.] | 2200–3300 m. [7200–10800 ft.] |
Distribution |
CA; ID; NV; OR; WA
|
CO; NV; UT
|
Discussion | Trifolium macrocephalum has the largest inflorescences of any clover. Trifolium megacephalum Nuttall (1818) is an illegitimate replacement name for Lupinaster macrocephalum Pursh. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium kingii is widely distributed throughout Utah (S. L. Welsh et al. 2008), is found in Mesa County southward to Dolores County in Colorado, and is found rarely in eastern Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Lupinaster macrocephalum | |
Name authority | (Pursh) Poiret in J. Lamarck et al.: Encycl., suppl. 5: 336. (1817) | S. Watson: Botany (Fortieth Parallel), 59. (1871) |
Web links |