生活型

herb

形態特徵

• A perennial herb. Stem annual, erect, glabrous.
• Leaves sessile, linear to linear-oblong, 20–50 mm long , 2–7 mm wide, obtuse to rounded or retuse at apex, rounded at base, entire at margin, glabrous on both surfaces.
• Cyathia in terminal compound pleiochasia; primary bracteal leaves 3 or 4, green or yellow green, ovate, oblong-lanceolate or oblong-oblanceolate, 7–17 mm long, 0.3–1.2 mm wide, obtuse or apiculate at apex, rounded at base; secondary bracteal leaves 2, green or yellow green, deltoid to reniform or rhombate, 5–13 mm long, 0.6–1.2 mm wide, obtuse at apex, rounded, cordate or truncate at base; tertiary bracteal leaves 2, green or yellow green, the shape same as secondary, 6–10 mm long, 3–6 mm wide; involucre urceolate-turbinate, 1.3–1.9 mm long, glabrous abaxially, velutinous adaxially at the portions under glands, stalks 0.2-0.7 mm long, the lobes semi-rounded to semi-oblong, entire to emarginate at apex, ciliate; glands 4 to 5, yellow, semi-circular to lunate, entire to denticulate or crenulate at abaxial margin, 0.9–1.7 mm long; bracteoles linear, laciniate. Male flowers 10–15, anthers yellow. Female flowers with glabrous ovary, styles and stigmas 0.5–1.1 mm long.
• Capsules glabrous. Seeds grayish, ellipsoid, 2–2.2 mm long, 1.4–1.5 mm in diam., smooth; caruncle depressed-conical, subcircular.

分布

• 台灣 : Endemic to rocky places of mountains in Hualien county.

引證標本

HUALIEN: Chingshuishan, Nakamura T.N–3782; Matakanshe (Batakan) to Uchitaroko, Hayata & Sasaki s. n. 1917 (Holotype and Isotype of Euphorbia tarokoensis Hayata, TI!); Yenhai Forest Trail, Lin & Noe 380.

引用文獻

• HUANG, TSENG-CHIENG, Flora of Taiwan, second edition 3: 466. .  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)