生活型

herb

形態特徵

• Stems 50–100 cm long, stout, terete, leafy, pubescent apically, much branched.
• Lower cauline leaves thin, broadly elliptic to oblong, 20–28×8.5–15 cm, apex obtuse to acute, narrowed at base into a broadly winged petiole, margins irregularly mucronulate-dentate, glandular-dotted beneath, short-pubescent on both sides; upper leaves oblong, sessile, gradually smaller, acute.
• Heads many, 6–8 mm broad, sessile, spicately arranged, usually without bracts, deflexed in anthesis. Involucre campanulate-globose, bracts 3-seriate, outer ones shortest, ovate-acuminate, short-pubescent, scarious-coriaceous at base, herbaceous toward apex, median and inner bracts oblong, rounded at apex. Florets 130–300; corolla of outer florets cylindric, 1.5–0.5 mm, of central florets 2.5 mm long.
• Achenes ca. 3.5 mm long, beak ca. 0.7 mm long.

分布

• 台灣 : in thickets, rare.
• 世界 : Japan, Korea, central and eastern China.

引證標本

TAIPEI: Sasaki 145, 5053. TAICHUNG: Lishan, Hsu 8726.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 893. 1998.  (Fl. Taiwan 2nd edit.)