Polygonum maackianum

長戟葉蓼

Polygonum maackianum Regel

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

Regel, Mémoires de l'Académie Impériale des Sciences de Saint Pétersbourg (Sér. 7) 4: 127. 1861. (Mém. Acad. Imp. Sci. St. Pétersb. (Sér. 7))

Hsu, Polyg. Taiwan 20. fig. 20. 1967.

Persicaria maackiana (Regel) Nakai ex Mori

Sasaki, List of plants of Formosa 169. 1928. (List Pl. Formos. (Sasaki))
Polygonum thunbergii Sieb. & Zucc. var. maackianum (Regel) Maxim. ex Fr. & Sav.

Kudo & Masam., Annual report of the Taihoku botanic garden, Faculty of Science and Agriculture, Taihoku Imperial Univeristy , Formosa, Japan 2: 53. 1932. (Ann. Rep. Taihoku Bot. Gard.)

herb

Ascending or decumbent herbs, to 100 cm tall, moderately to densely stellate pubescent and loosely strigose throughout; stems angular, much branched, armed with recurved prickles, rooting at lower nodes.
Leaves hastate, with two divergent lobes, 2–5.5 cm long, 3–5.2 cm wide, middle lobe linear-lanceolate, apex acute, basal lobes lanceolate, acute, beneath midvein retrorsely prickly; petioles 1–4.5 cm long; ocreae foliaceous, upper margins expanded, green, dentate, ciliate.
Inflorescences 1–2-flowered fascicles in head-like panicles, terminal or in axils of upper leaves, branched, densely flowered; peduncles glandular pubescent at upper position, 1–3 cm long; bracts lanceolate, upper margins ciliate. Flowers white to pink; pedicels included; perianth segments 5, elliptic, 2–3 mm long, apex obtuse; stamens 8; styles 3-cleft, included; nectaries present.
Achenes dark brown, trigonous, smooth, slightly shining, ca. 2.5 mm long.