Trifolium macrocephalum |
Trifolium tomentosum |
|
---|---|---|
big-headed clover, largehead clover |
woolly clover |
|
Habit | Plants perennial, erect or ascending, 5–25 cm, villous; branched. | |
Leaves | palmate; leaflets (5)7–9, broadly to narrowly obovate, often folded, 10–27 × 4–11 mm, bases cuneate; margins serrulate or irregularly lobed; veins thickened, especially distally; tips rounded or truncate, apiculate; surfaces abaxially villous, adaxially sparsely villous to glabrate; petioles 10–140 mm; petiolules 0.9–1.2 mm; stipules ovate, obovate, or oblong, 10–30 mm; margins entire. |
|
Inflorescences | terminal, 20–32-flowered, globose or ovoid-ellipsoidal, 25–80 × 30–70 mm; involucres absent; bracteoles broadly ovate, membranous; ? 0.5 mm, truncate. |
|
Peduncles | 20–80 mm. |
|
Pedicels | erect, 1–1.5 mm. |
|
Flowers | 20–30 mm; calyces campanulate, 10–22 mm, villous; veins 10–15; tubes 2.5–4 mm; lobes subulate, subequal, 2–4 × tube length, plumose; orifices open; corollas 20–28 mm, white; creamy white, or pinkish; banners ovate or oblong, 20–28 × 10–13 mm; tips rounded or slightly emarginate; keel petals deep pink. |
|
Fruits | longitudinally dehiscent; ovoid, 4–5 mm; ? calyces. |
|
Seeds | 1–2; mitten-shaped to ellipsoid, 2.5–3 mm, yellow or reddish; smooth. |
|
2n | =32, 48. |
|
Trifolium macrocephalum |
Trifolium tomentosum |
|
Distribution | ||
Discussion | Rocky places, hard, compacted clay gumbo, lava beds, sage-covered slopes. Flowering Apr–Jul. 0–2200 m. BR, BW, Col, ECas, Lava, Owy. CA, ID, NV, WA. Native. Trifolium macrocephalum has the largest inflorescences of any species in the genus. The name T. megacephalum is an illegitimate replacement name for Lupinaster macrocephalum. |
|
Source | Flora of Oregon, volume 2, page 734 Michael Vincent |
|
Sibling taxa | ||
Web links |