Shrubs, deciduous, from long, slender, yellow rhizomes. Leaves cauline, petiolate; cauline leaves alternate. Leaf-blade 1-2-pinnately compound; leaflets lanceovate to broadly ovate or rhombic, margins variously sharply cleft, incised, or serrate. Inflorescences axillary, many-flowered panicles, 5-21 cm; bracts scalelike, not forming involucre. Flowers bisexual, radially symmetric; sepals persistent in fruit, 5, dark brown-purple to greenish yellow, plane, lanceolate to oblanceolate, usually clawed, ca. 2.5-5 mm; petals 5, distinct, brown-purple, plane, peltate, 0.5-0.9 mm; nectary terminal, transversely oblong, 2-lobed; stamens 5 (or 10); filaments with base expanded; staminodes absent between stamens and pistils; pistils (2-) 5-10, simple; ovules 2, basal ovule aborting; style present. Fruits follicles, aggregate, sessile, compressed, obliquely oblong or somewhat sickle-shaped, sides not veined; beak becoming abaxial, curved, 0.4-0.8 mm. Seeds reddish-brown, ovoid, smooth. x=18.

Distribution

North America

Discussion

Species 1 (1 in the flora).

Selected References

None.

Lower Taxa

Xanthorhiza simplicissima