Euphorbia shouanensis

霞山大戟

endemic

Euphorbia shouanensis Keng

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

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名彙資訊

學名發表文獻

Keng, Journal of the Washington Academy of Sciences 41: 205. 1951. (J. Wash. Acad. Sci.)

台灣首次記錄發表文獻

同發表文獻

異名

Euphorbia formosanus auct. non Hayata

Yamamoto, Journal of the Society of Tropical Agriculture 5: 179. 1933. (J. Soc. Trop. Agr., 熱帶農學會誌)
Galarhoeus shouanensis (Keng) Keng

Keng, Quarterly journal of the Taiwan Museum 4: 257. 1951. (Quart. J. Taiwan Mus., 臺灣省博物館季刊)
Galarhoeus formosanus (Hayata) Hurusawa var. hayatai Hurusawa

Hurusawa, Journal of the Faculty of Science, Imperial University of Tokyo. Section III, Botany 6(6): 263. fig. 26. 1954. (J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot., 東京帝國大學理學部紀要, 第三類, 植物學)

各語言俗名

中

叔安大戟.

特徵描述

生活型

herb

形態特徵

A perennial herb. Stem annual, erect, villous.
Leaves sessile, linear-lanceolate, 50–80 mm long, 6–18 mm wide, acute at apex, attenuate at base, entire at margin, glabrous on both surfaces or villous at base.
Cyathia in terminal compound pleiochasia; primary bracteal leaves 5, 7, or 8, green or yellow green, ovate, oblong or oblong-lanceolate, 15–43 mm long, 6–15 mm wide, acute at apex, rounded at base; secondary bracteal leaves 3 or 4, green or yellow green, broadly obvate, oval or rhombate-rounded, 7–18 mm long, 7–14 mm wide, acute or obtuse at apex, rounded at base; tertiary bracteal leaves 2 or 3, green or yellow green, broadly obovate or rhombate-rounded, 6–11 mm long, 5–9 mm wide, obtuse or rounded at apex, rounded at base, involucre turbinate, 1.8–2.8 mm long, glabrous abaxially, woolly adaxially at the portions under glands, stalks 1–1.3 mm long, the lobes ovate-oblong to obovate-oblong, emarginate to irregular dentate at apex, velutinous at margin; glands 4, yellow, transversely elliptic, adaxial half much larger than abaxial half, both adaxial and abaxial half ascending, 0.8–1.5 mm long; bracteoles oblanceolate, fringed. Male flowers 15–20, anthers yellow. Female flowers with glabrous, densely verrucose ovary, styles and stigmas 1–2 mm long.
Capsules glabrous, sparsely verrucose. Seeds dark-brownish, subglobose, ca. 2.4 mm long, 2.1 mm in diam., smooth; caruncle depressed conical, reniform.

分布

台灣 : Endemic to eastern and western regions of Taiwan. Local populations occur at exposed hill side and grassland of the mountains.

引證標本

MIAOLI: Houlung, Kao k3794. CHIAYI: Shouan, Hsiashan, Suzuki ST 20910 (Holotype of Euphorbia shouanensis Keng, TAI!). TAITUNG: Painienpu, Yamamoto 770.