Comprehensive DescriptionRead full entry
General DescriptionRhizome robust, blackish. Stem 1-2 m tall, base to 1.4 cm in diameter, branched, pubescent. Leaves 2-3-ternately pinnate. Proximal cauline leaves long petiolate; petiole to 15 cm; leaf blade triangular, to 30 cm wide; terminal leaflet rhombic, 7-10 cm long, 4-7 cm wide, usually lobed, margin serrate; lateral leaflets obliquely ovate; not becoming black when dried, abaxially white pubescent at veins, adaxially glabrous. Distal cauline leaves shortly petiolate or sessile, small. Inflorescence racemose, to 45 cm, 3-20-branched, proximal branch to 15 cm; rachis densely gray glandular pubescent, intermixed gray pubescent; bracts subulate, ca. 1 mm, caducous. Pedicel ca. 2 mm. Flowers small, ca. 4 mm in diameter. Sepals white or greenish white, obovate-orbicular, 3-4 mm. Petals broadly elliptic, ca. 3 mm, undivided or indistinctly 2-lobed., nearly membranous. Stamens 4-7 mm; anthers yellow or yellowish white. Carpels 2-5, densely gray pubescent, sessile or very shortly stalked. Follicles oblong, 8-14 mm long, 2.5-5 mm wide, appressed pubescent, stalk 2-3 mm. Seeds brown, ellipsoid, 2.5-3 mm, with scaly wings all around.