Flora of North America species comparison

creeping, branched, rooting at nodes.

palmate;

stipules lanceolate or ovate, 0.5–1 cm, margins entire or shallowly lobed, apex acute to cuspidate;

petiole 3–13(–25) cm;

petiolules 1 mm;

leaflets 3, blades obovate, rhombic, or elliptic, 1–1.9 × 0.8–1.2 cm, base cuneate, veins prominent, margins minutely denticulate or entire, apex rounded, emarginate, surfaces glabrous or sparsely hairy.

terminal, 25–50-flowered, globose, 1.8–2.2 × 1.8–2.2 cm;

involucres absent.

1 or 2 from end of stolon at ground-level, 10–12 cm.

reflexed in fruit, 2–3 mm;

bracteoles triangular-acuminate, 0.5–1.5 mm.

9–11 mm;

calyx campanulate, 4.5–5.5 mm, sparsely puberulent, veins 10, tube 2 mm, lobes equal, narrowly triangular to subulate, orifice open;

corolla white, veins often reddish, 8–9 mm, banner obovate-oblong, 9–11 × 5–6 mm, apex rounded, retuse.

stipitate, ellipsoid, 2–3.5 mm.

1 or 2, light brown, mitten-shaped, 1.1–1.5 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).

= 16.