Emilia sonchifolia var. javanica

紫背草

Emilia sonchifolia (L.) DC. var. javanica (Burm. f.) Mattfeld

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

Mattfeld, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 64: 445. 1929. (Bot. Jahrb. Syst.)

台灣首次記錄發表文獻

Peng, Chung & Li, Flora of Taiwan, second edition 4: 940. pl. 443. photo 446. 1998. (Fl. Taiwan 2nd edit.)

異名

Emilia sonchifolia (L.) DC.

Li, Flora of Taiwan 4: 853. pl. 1224. 1978. pro parte. (Fl. Taiwan)
Emilia taiwanensis S. S. Ying

S. S. Ying, Cloured illustrated flora of Taiwan : Includes introduced species 5: 602. photo 1285. 1995. (Col. Ill. Fl. Taiwan Intr. Pl.)

各語言俗名

中

葉下紅. 一點紅.
英

Siwthistle tasselflower.
日

うすべににがな.
原

Kamu tto (Paiwan). Syairabaru (Bunun). Taiga-asu (Bunun). Sairabasu (Bunun). Yoûmuru (Atayal). Reumuru (Atayal). Karawagai (Ami).
台

Hiòh ê âng.

參考文獻

W. C. Lin, Wild flowers of Taiwan - the 1300 species found in the lower elevation . 2005. (Wild flowers of Taiwan)
Yang, A list of plants in Taiwan . 1982. (List Pl. Taiwan)

特徵描述

生活型

herb

形態特徵

Annual herbs. Stems 20–45 cm tall, branched except at base, nearly glabrous to sparsely pilose, glaucous.
Lower leaves thick, closely arranged, 5–10×2.5–6.5 mm wide, lyrately pinnatifid, loosely short pubescent, lower surface usually purplish, winged-petiolate, sagittate and clasping at base, margins entire or irregularly serrulate, sessile; uppermost leaves linear, small, few.
Heads 2–5, terminal, 8 mm long, accrescent to 14 mm long, in corymbs. Florets pale purple, 15–35, corolla lobes 1.1–1.5 mm long. Involucre tubular, bracts in 1 series, equal, oblong linear, acute; 9 mm long.
Achenes 3×0.5 mm, 5-ribbed, ribs puberulous. Pappus white, 8 mm long, bristles slender.

分布

台灣 : common in coastal regions, sandy places, wastelands, roadside and paddy ridges, sea level to about 850 m.
世界 : Widely distributed in the South Pacific islands from Indonesia to eastern Polynesia, Japan and China.

引證標本

TAIPEI: Huayuanhsincheng, Peng 118; Chingmeishan, Wang 2996. ILAN: Yuanshan, Hsu & Kao 8377. TAOYUAN: Chuang & Kao 3128. HSINCHU: Simizu 43. TAICHUNG: Mori s. n. 1936. PENGHU: Chimei Is., Huang 7085. PINGTUNG: Liuchiu Isl., Hosokawa s. n. 1930. TAITUNG: Lanyu Is., Huang & Kao 5076. HUALIEN: Tienhsiang, Huang 4322.