千头艾纳香 qian tou ai na xiang

Conyza lanceolaria Roxburgh, Fl. Ind., ed. 1832, 3: 432. 1832; Bileveillea granulatifolia H. Léveillé; Blumea lanceolaria var. spectabilis (Candolle) Randeria; B. myriocephala Candolle; B. spectabilis Candolle.

Herbs or subshrubs, perennial, erect, 1-2.5 m tall. Stems striate, green, woody at base, hollow in center, 1-25 cm in diam., glabrate or puberulent particularly on younger parts and in synflorescence, usually unbranched except for synflorescence. Leaves herbaceous, dark green adaxially, narrowly oblong to oblanceolate, 20-30 × 4-8 cm, abaxially glabrate or puberulent with sparse multicellular hairs, adaxially often rugose and glabrous, base attenuate into auriculate petiole, margin minutely serrate-dentate, apex acuminate; veins 14-16 pairs. Capitula numerous, 7.5-8.5 × 2.5-3.5 mm, terminal, in a pyramidal panicle. Involucre campanulate-globose; phyllaries in 2 or 3 series, outer ones shorter, ovate-lanceolate to linear, 6.5-7.5 × ca. 0.5 mm, with prominent scarious margins, margins and apices ciliate. Receptacle flat, 1.5-2.5 mm in diam., alveolate, fimbriate or densely pilose. Marginal florets 6-7 mm, 2- or 3-lobed, glabrous. Central florets yellowish, 6.5-7.5 mm, with 5 broadly triangular lobes, lobes with sessile glands and remote multicellular hairs. Anthers sagittate, tailed. Achenes oblong, ca. 1 × 0.3-0.4 mm, 10-ribbed, pubescent. Pappus pale reddish, ca. 5 mm. Fl. Jan-Apr. 2n = 18.

Forests, grassy slopes, riversides; 400-1500 m. Guangdong, Guangxi, Guizhou, Taiwan, Yunnan [Bhutan, India, Indonesia, Japan, Myanmar, Pakistan, Philippines, Sri Lanka, Thailand, Vietnam].