Ixeris debilis

細葉剪刀股

Ixeris debilis (Thunb.) A. Gray

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

名彙資訊

學名發表文獻

A. Gray, Memoirs of the American Academy of Arts and Science, new series 6: 397. 1859. (Mem. Amer. Acad. Arts, n.s.)

台灣首次記錄發表文獻

Kitamura, Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 23(1): 126. 1956. (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)

異名

Lactuca trifida Kitam.

Kitam., Acta phytotaxonomica et geobotanica eng 1: 58. 1932. (Acta Phytotax. Geobot.)
Ixeris japonica (Burman) Nakai ssp. litoralis Kitam.

Kitam., Acta phytotaxonomica et geobotanica eng 3: 132. 1934. (Acta Phytotax. Geobot.)
Ixeris japonica (Burman) Nakai ssp. salsuginosa Kitagawa

Kitagawa, The Botanical magazine, Tokyo 48: 113. 1934. (Bot. Mag. Tokyo)
Ixeris japonica (Burman) Nakai ssp. trifida (Kitam.) Kitam.

Kitam., The Botanical magazine, Tokyo 49: 288. 1935. (Bot. Mag. Tokyo)
Ixeris debilis (Thunb.) A. Gray ssp. litoralis (Kitam.) Kitam.

Kitam., Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 23: 126. 1956. (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
Ixeris japonica (Burman) Nakai var. litoralis (Kitam.) H. L. Li

H. L. Li, Flora of Taiwan 4: 888. 1978. (Fl. Taiwan)

各語言俗名

中

剪刀股.
日

おおじしばり. ほそばじしばり.

參考文獻

Yang, A list of plants in Taiwan . 1982. (List Pl. Taiwan)

特徵描述

生活型

herb

形態特徵

Perennial herbs; stems slender, long creeping above ground, branched, leafy.
Radical and cauline leaves yellowish green, linear, lance-linear, oblanceolate to spatulate-elliptic, entire, loosely toothed, to deeply pinnatifid, 4–20×0.4–4 cm, apex attenuate-acuminate, base attenuate, petiole 1–8 cm long. Scapes 10–30 cm long, sometimes with a single leaf.
Heads 1–5, 20–24 flowered, 2.5–4 cm across, peduncled; involucre 12–14 mm long, outer bracts calyculate, ovate to ovate-oblong, 2–4(–6) mm long. Corolla yellow, 10–20×3 mm.
Achenes ca. 7–8 mm long, narrowly fusiform, slightly incurved, brown, deeply 10-sulcate, beak 3–3.5 mm long. Pappus 6–8 mm long.
Ixeris debilis is widely distributed in eastern Asia, mainly along seashores. It is extremely variable in leaf shape and size. Kitamura (1934, 1956) differentiated subsp. debilis, subsp. litoralis, subsp. liukiuensis and subsp. tirfida for plants of this complex, which was followed by Pak & Kawano (1992). We agree with Yahara (1995) that these taxa are morphological indistinguishable from the typical subspecies because there are many intermediates. Recognition of these infraspecific taxa is not warrented.

分布

台灣 : sandy seashores in the north.
世界 : Japan, Korea and China.

引證標本

TAIPEI: Juifang, Leu 394; Keelung, Peng 4902; Pitouchiao to Aoti, Leu 394; Wanli, Wang 971. ILAN: Toucheng, Peng 13829; Tongkang, Peng 7739. TAOYUAN: Shahlun, Peng 7716.