Flora of North America species comparison

cespitose, spreading, branched proximally, sparsely branched distally.

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.

terminal, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm;

involucres absent.

3–7 cm, surpassing subtending leaves.

erect, reflexed in proximalmost flowers, 1 mm;

bracteoles cuplike, 0.5 mm.

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.

ellipsoid, 4–5 mm.

1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth.

difficulty of distinguishing Trifolium mucronatum from T. wormskioldii is discussed under 33. T. wormskioldii.

in the United States represent T. mucronatum subsp. lacerum; in Mexico, subsp. lacerum is found in the north, subsp. mucronatum (petals pink or reddish, flowers 1.5–1.7 cm, inflorescences 2.5–3.5 cm diam.) is widespread, and subsp. vaughanae J.

.;

m .

(petals lavender or white, flowers 1.2–1.4 cm, inflorescences 1.5–2 cm diam.) is restricted to central Mexico (Guanajuato, San Luis Potosí) (J.; gillett 1980).