生活型

herb

形態特徵

• Annual herbs. Stems erect, 30–150 cm tall, branched, striate, viscid glandular pubescent, especially in inflorescence, later glabrate.
• Basal and lower leaves withered and deciduous at anthesis, middle cauline leaves elliptic-lanceolate, 5–10 cm long, 1–4 cm wide, apex acute to acuminate, base attenuate, nearly sessile, margins serrate, sparsely puberulous and glandular dotted on both surfaces.
• Heads numerous, in glomerules terminating stems and branches, 5 mm long, 6 mm across; peduncle 1–9 mm long. Involucre campanulate, bracts 3-seriate, herbaceous, margins scarious, purplish tinged, subequal, linear-lanceolate, 3–4 mm long, densely glandular puberulous and with few eglandular hairs. Ray florets numerous, corolla tubular, filiform, 0.5–1 mm long, lacerate apically; styles 3–3.5 mm long, prominent, nearly equalling pappus, upper part red-purple. Disc florets 5–10, corolla funnelform, ca. 6 mm long, upper part slightly shorter than lower, minutely pubescent just below apex, 5-lobed; lobes and styles sometimes red-purple.
• Achenes obovate, compressed, 0.5–0.6 mm long, 0.3–0.4 mm wide, sparsely pubescent, glabrate, pale umber. Pappus slightly reddish, bristles numerous, in one row, 4–6 mm long at maturity, deciduous.

物候

Fl. Dec-Mar.

分布

• 台灣 : exposed places and roadside slopes at low elevations in the south.
• 世界 : India, Thailand, southern China, Taiwan, the Ryukyus, the Philippines, Java and Australia.

引證標本

TAICHUNG: Takeng, Kao 10785. TAINAN: Nanhua, Peng 10549. KAOHSIUNG: Shanhuhsi, Hsu & Peng 16094. CHIAYI: Sasaki 114530.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 918. 1998.  (Fl. Taiwan 2nd edit.)