Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Trifolium macrocephalum (Pursh) Poir.
- Family: Pea (Leguminosae)
- Flowering: April-May
- Field Marks: The field marks for this clover are purple or purplish flowers in heads up to 1 1/2 inches long and its leaves with 4, 7, or 9 leaflets
- Habitat: Wet meadows; also on slopes and in sagebrush.
- Habit: Perennial herb with thickened rootstocks, forming loose mats.
- Stems: Spreading, rather stout, sparsely long-hairy, up to 1 foot long.
- Leaves: Alternate, on stalks up to 3 inches long, divided into 5, 7, or 9 leaflets; leaflets 1/2-1 inch long, oblong to obovate, rounded at the tip, tapering to the base, sparsely
toothed, sparsely hairy; stipules ovate to oblong, up to 1 inch long, sparsely toothed.
- Flowers: Many in an ovoid head up to 1 1/2 inches long, the head on a stalk up to 1 1/2 inches long; each flower on stalks up to 1/20 inch long; bracts bristly.
- Sepals: 5, green, 1/2-1 inch long, united below, the lobes very narrow and pointed, long hairy.
- Petals: 5, purple or purplish, up to 1 1/2 inches long, arranged in the form of a sweetpea flower.
- Stamens: 10.
- Pistils: Ovary superior.
- Fruits: Pods smooth, up to 1/4 inch long, on a short stalk, usually about 6-seeded.
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