鹿角草 lu jiao cao

Zinnia bidens Retzius, Observ. Bot. 5: 28. 1788; Bidens meyeniana Walpers; B. tenuifolia Labillardière; Glossogyne bidens (Retzius) Alston; G. oluanpiensis S. S. Ying; G. tenuifolia (Labillardière) Cassini.

Herbs, perennial. Stems woody at base, 20-30 cm, somewhat tufted. Radical leaves persistent, 4.5-9 cm, glabrous, sometimes undivided and linear, usually pinnately parted, segments 2 or 3 pairs, remote, spreading, linear, 1.8-2 mm wide, obtuse, lower segments 8-20 mm, petiole 2.7-6 cm; median leaves few, remote, petiolate, 3-4 cm, pinnately parted or linear; upper leaves smaller, linear. Capitula ca. 7 mm in diam., solitary, basal bracteoles ca. 1.5 mm; phyllaries and paleae ca. 7, oblong, ca. 3 mm. Ray florets few, 1-seriate, fertile; corolla ca. 3.5 mm, lip 3-lobed. Disk florets: corolla ca. 2.5 mm, apex 4-lobed. Pappus awns erect, 1.5-2 cm. 2n = 24.

Exposed coastal areas, sometimes on raised coral reefs; low elevations. Fujian, Guangdong, Guangxi, Hainan, Taiwan, Xizang [Bangladesh, India, Indonesia, Malaysia, Papua New Guinea, Philippines, Thailand, Vietnam; Australia, Pacific islands (New Caledonia)].