Euphorbia formosana

台灣大戟

endemic

Euphorbia formosana Hayata

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

Hayata, Materials for a flora of Formosa 262. 1911. (Mat. Fl. Formos.)

台灣首次記錄發表文獻

同發表文獻

異名

Euphorbia dendroides auct. non L.

Hayata, The Journal of the College of Science, Imperial University of Tokyo, Japan 20: 65. 1904. (J. Coll. Sci. Univ. Tokyo)
Euphorbia orientalis auct. non L.

Hayata, The Journal of the College of Science, Imperial University of Tokyo, Japan 20: 70. 1904. (J. Coll. Sci. Univ. Tokyo)
Galarhoeus calonesiaca (Croizat) Hara

Hara, Journal of Japanese Botany 14: 356. 1938. (J. Jpn. Bot., 植物硏究雑誌)
Euphorbia calonesiaca Croizat

Croizat, Journal of the Arnold Arboretum 19: 97. 1938. (J. Arnold Arbor.)
Galarhoeus formosanus (Hayata) Hara

Hara, Journal of Japanese Botany 14: 356. 1938. (J. Jpn. Bot., 植物硏究雑誌)

各語言俗名

中

寶島大戟. 五虎下山. 大甲草. 八掛草.
日

たいわんたかとうだい. きだちだいげき.
台

Pat kòa chháu. Tāi kah chháu.

參考資料

Ciou & Pong, Illustrations of Hakka ethnobotany of Taiwan 118. 2008. (Illustration of Hakka ethnobotany of Taiwan, 台灣客家民族植物圖鑑篇)
Yang, A list of plants in Taiwan . 1982. (List Pl. Taiwan, 台灣植物名彙)

特徵描述

生活型

herb

形態特徵

A perennial herb. Stem annual, erect, glabrous or pubescent right below leaf base.
Leaves sessile, linear-lanceolate, 50–120 mm long, 5–15 mm wide, acute at apex, attenuate at base, entire at margin, glabrous on both surfaces, or sometimes hairy on the adaxial surface of leaf base.
Cyathia in terminal compound pleiochasia; primary bracteal leaves 5, 8, or 9, green or yellow green, linear-lanceolate or lanceolate, 20–95 mm long, 6–16 mm wide, acute at apex, obtuse at base; secondary bracteal leaves 3 or 4, green or yellow green, broadly obovate, oval, or rhombate-rounded, 7–18 mm long, 5–15 mm wide, obtuse at apex, rounded or obtuse at base; tertiary bracteal leaves 2 or 3, green or yellow green, broadly obovate or rhombate-rounded, 9–11 mm long, 8–11 mm wide, obtuse at apex, rounded at base; involucre turbinate, 2.1–3.6 mm long, glabrous abaxially, sericeous adaxially at the portion under glands, stalks 1.1–1.8 mm long, the lobes ovate-oblong to obovate-oblong, emarginate to irregular dentate at apex, pilose at margin; glands 4, yellow, transversely elliptic, disc-like, 1.1–2.4 mm long; bracteoles oblanceolate, fringed. Male flowers 15–20, anthers yellow. Female flowers with glabrous, densely verrucose ovary, styles and stigmas 2–4 mm long.
Capsules 4–5 mm long, 5.7–6.3 mm in diam., glabrous, sparsely verrucose. Seeds brownish or grayish, subglobose, 2.8–3.7 mm long, 2.3–2.7 mm in diam., smooth; caruncle semi-circular, revolate.

分布

台灣 : Endemic to the western parts of Taiwan.

引證標本

TAIPEI: Pinlin, Chin s. n. 1977; Tachichiao, Ou s. n. 1988. HSINCHU: Hsinchungtzu, Kao 10689. MIAOLI: Tunghsiao, Suzuki ST20048. TAICHUNG: Tunghsing (Shuitiliao), Miyake s. n. 1898 (Holotype of Euphorbia formosana Hayata,TI!); Tamaopu, Satake s. n. 1898 (Type of Euphorbia calonesiaca Croizat, TI!). NANTOU: Juitien, Lin 684. CHIAYI: Meishan, Kao 10487.