Aster oldhamii

台灣狗娃花

endemic

Aster oldhamii Hemsl.

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

Hemsl., The journal of the Linnean Society of London. Botany 23: 414. 1888. (J. Linn. Soc., Bot.)

台灣首次記錄發表文獻

同發表文獻

異名

Heteropappus oldhamii (Hemsl.) Kitam.

Kitam., Acta phytotaxonomica et geobotanica eng 1: 146. 1932. (Acta Phytotax. Geobot.)
Heteropappus oldhamii (Hemsl.) Kitam. f. discoideus Kitam.

Kitam., Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 13: 321. 1937. (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
Heteropappus hispidus (Thunb.) Less. ssp. oldhamii (Hemsl.) Kitam.

Kitam., Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 24: 53. 1957. (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
Heteropappus hispidus (Thunb.) Less. ssp. oldhamii (Hemsl.) Kitam. f. discoideus (Kitam.) H. L. Li

Li, Flora of Taiwan 4: 884. 1978. (Fl. Taiwan)
Aster hispidus (Thunb.) Less. var. oldhamii S. S. Ying

S. S. Ying, Coloured illustrations of herbaceous plats of Taiwan 1: 173. 1980. (Col. Ill. Herb. Pl. Taiwan)

各語言俗名

日

はまのぎく.

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

Erect biennial herbs, sometimes diffuse and decumbent, stems terete, 20–60 cm tall, well branched from lower part of stem, terminating in 1-few heads, glabrous.
Radical leaves rosulate, oblong-spatulate, 8–15 cm long, 3–5.5 cm wide, apex round, base cuneate, margins entire, ciliate, nearly glabrous on both surfaces, withered at anthesis. Cauline leaves green, thin, elliptic-lanceolate or obovate, apex round or obtuse, base narrowed, sessile, 4.5–5.5 cm long, 13–23 mm wide, hispid on veins on lower surface, margins entire, ciliate; usually bimodal in size and shape, leaves below lowest branch larger, leaves on branches smaller, elliptic-lanceolate to oblong-lanceolate, 2–3 cm long, 6–10 mm wide.
Heads many, 2.5–3.5 cm across, peduncle 2–3 cm long, often solitary, terminating branches, in loose corymbs. Involucre hemispheric or bowl-shaped, 7–10 mm long, 12–16 mm broad, bracts green, herbaceous, 2 or 3 seriate, subequal, linear lanceolate or subulate, entire, acuminate to attenuate-acuminate, 4.5–7.5 mm long, 1–1.7 mm wide, sparsely hirsute outside, margins ciliate. Ray florets 15–22 in 1 or 2 series or sometimes lacking, when present ligules white, 8.5–12 mm long, 2–3 mm wide, tube 1 mm long. Disc florets 4–4.5 mm long, unequally 5-lobed. Pappus dimorphic, that of ray florets white, 0.5–1 mm long, forming a crown, that of disc florets reddish, 3–4 mm long.
Achenes brown, obovate, compressed, 2.5–3 mm long, 1.5–2 mm broad, finely sericeous, sparsely glandular punctate apically.
Chromosome number, 2n = 36 (Peng & Hsu, 1978); 2n = 54 (Gu, Cathaya 1: 3. 1989). <li>Aster oldhamii differs from A. hispidus by its dimorphic leaves, with the larger leaves below the lowest branch and smaller leaves on the upper part. Ray florets are lacking in some individuals of A. oldhamii.</li>