生活型

herb

形態特徵

• A biennial herb. Stem erect, glabrous.
• Leaves obovate to obovate-elliptic, 10–18 mm long, 5–10 mm wide, obtuse to rounded at apex, attenuate at base, entire at margin, glabrous on both surfaces; petioles slender, 2.5–7 mm long.
• Cyathia in terminal compound pleiochasia; primary bracteal leaves 3, green, obovate to obovate-elliptic, 8–16 mm long, 4–8 mm wide, obtuse to rounded at apex, attenuate at base, petioles 2–7 mm long; secondary bracteal leaves 2, green or yellow green, triangular-ovate or obovate, 12–17 mm long, 7–11 mm wide, obtuse at apex, obliquely cuneate to attenuate at base; tertiary bracteal leaves 2 or 3, green or yellow green, the shape same as secondary, 11–16 mm long, 8–10 mm wide; involucre turbinate, 0.8–1 mm long, glabrous abaxially and adaxially, stalks 0.8–1.6 mm long, the lobes ovate, ciliate; glands 4, pale green, lunate, much prolonged at each end into slender horns, 0.3-0.4 mm long; bracteoles linear, branched at top. Male flowers 10–20, anthers yellow. Female flowers with glabrous ovary, bicarinate at each angle, styles and stigmas 0.2-0.4 mm long.
• Capsules bicarinate at each angle, ca. 2 mm long, ca. 1.9 mm in diam., glabrous. Seeds grayish, ellipsoid, subhexagonal, the two ventral faces each with a large lengthwise depression, the four dorsal faces each with 1–4 large shallow pits in longitudinal rows, sometimes additional pits between the rows, 1.3–1.5 mm long, 0.7-0.8 mm wide; caruncle conical.

分布

• 台灣 : Taiwan, known from Tanshui and shaddy place of Wuling farm.
• 世界 : Europe, North Africa and Continental Asia.

引證標本

TAIPEI: Tanshui, Nagazawa 798; Kuo 6571. TAICHUNG: Wuling farm, Lin 630.

參考文獻

• HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 3: 463. .  (Fl. Taiwan 2nd edit.)