Polygonum lanatum

白苦柱

Polygonum lanatum Roxb.

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

Roxb., Flora Indica; or descriptions of Indian Plants 2: 285. 1832. (Fl. Ind. ed. 1832.)

Polygonum bioritsuense Ohki

Ohki, The Botanical magazine, Tokyo 39: 259. 1925. (Bot. Mag. Tokyo)
Persicaria bioritsuense (Ohki) Sasaki

Sasaki, List Pl. Form. (Sasaki) 168. 1928.
Polygonum lapathifolium L. var. lanatum (Roxb.) Stew.

Kudo & Masam., Annual report of the Taihoku botanic garden, Faculty of Science and Agriculture, Taihoku Imperial Univeristy , Formosa, Japan 2: 52. 1932. (Ann. Rep. Taihoku Bot. Gard.)

herb

Annual ascending herbs, to 140 cm tall, densely lanate or tomentose throughout; stems much branched; nodes enlarged.
Leaves lanceolate, 7–20 cm long, 1.5–3.5 cm wide, apex acuminate, base cuneate to narrowly cuneate; petioles narrowly winged, 0.2–1 cm long; ocreae tubular, 2–2.5 cm long, apex truncate, upper margins short ciliate or eciliate.
Inflorescences 5- or 6-flowered fascicles in spike-like panicles, terminal or axillary, densely flowered, interrupted below, 4–8 cm long; peduncles 2–5 cm long; bracts lanceolate, apex acuminate, upper margins ciliate. Flowers greenish-white or pink; pedicels included; perianth segments 4, obovate, 2–3 mm long, apex obtuse; stamens 5 or 6, styles deeply 2-cleft, included; nectaries present.
Achenes brown to dark brown, lenticular, smooth, shining, 2–3 mm long.

台灣 : at low altitudes, in sunny places and along streams throughout the island.
世界 : India, Bhutan, Nepal, Sikkim, Myanmar, S China, the Ryukyus, Java, Malaysia and the Philippines.