Hirsute ascending perennials to as much as 70 cm., not rooting at the nodes, the roots fibrous. Cauline leaves alternate, appressed-hirsute, gradually reduced to linear bracts, the blades trifoliate, the leaflets often lobate and dentate, deltoid to rhombic, apically acute, basally attenuate to rounded, 2-10 cm. long, 1-8 cm. broad, the central petiolules to 4 cm. long; petioles 1-10 cm. long, the sheaths mostly 5-15 mm. long; radical leaves similar to the cauline but often with larger blades and longer petioles. Flowers 1-several in terminal lax racemes, the pedicels 2-12 cm. long; sepals 5, greenish-yellow, 5-to 7-nerved, dorsally hirsute, 5-7 mm. long, 2.5-4.0 mm. broad, promptly caducous; petals 5-10, yellow, occasionally drying white, narrowly obovate, broadest above the middle, 8-12 mm. long, 3-5 mm. broad, the nectary flap reniform to semicircular, ca. 1 mm. long; stamens numerous, becoming 4 mm. long, the anthers ca. 1 mm. long; carpels numerous. Fruiting heads subglobose, 7-8 mm. long; achenes 10-20, ellipsoid to discoid, 2.5-3.0 mm. long, 2-3 mm. broad, the beaks 1.5-3.0 mm. long, arcuate; fruiting pedicels 4-15 cm. long, the receptacles 2.5-3.5 mm. long, hispid.
Home