Volume 14 > Part 1 > Year 2018 > Page 151 > Polygonaceae > Rumex

Rumex crispus L.wfo-0000403671

Sp. Pl. 1: 335. 1753; lour., Fl. Cochinch. 1: 216. 1790; Meisn. in DC., Prodr. 14(1): 44. 1856; Courchet, Fl. Indo-Chine [P.H.Lecomte et al.] 5: 18. 1910; Merr., Enum. Philipp. Fl. Pl. 2: 121. 1923; Alston in Trimen, Handb. Fl. Ceylon 6: 241. 1931; Smitinand, Thai Forest Bull., Bot. 2: 11. 1955; Backer & Bakh.f., Fl. Java 1: 220. 1963; P.H.Hô, Câyco Việtnam 1(2): 939. 1991; Philcox in Dassan. & Clayton, Revis. Handb. Fl. Ceylon 11: 393. 1997; A.J.Li et al. in C.Y. Wu et al., Fl. China 5: 337. 2003; N.T.Do in Bân, Fl. Vietnam 11: 217. 2007.— Lapathum crispum (L.) Scop., Fl. Carniol. ed. 2, 1: 261-262. 1771. Plate XV: E.

Accepted Name : This is currently accepted.

Description : Erect perenial herbs, 30–90 cm tall; stem and branches terete with conspicuous ridges, glabrous. Leaves with petioles 2.5–5(–8) cm long, glabrous; lamina (12–)18–30(–34) by (4–)6–10(–18) cm, usually in a rosette, elliptic or elliptic-oblong, glabrous, base cuneate, apex acute or obtuse, margins undulate; secondary veins 20–26-paired. Ocreae 4–7 cm long, scarious, glabrous, venation conspicuous with 11–16 veins, deciduous, apex oblique, without bristles. Inflorescences terminal, 20–30(–38) cm long, erect; inflorescence branches glabrous; leafy bracts (5–)6–13(–15) by 0.5–1(–2) cm, elliptic, apex acute or obtuse, margin undulate. Flowers 12–20(–28) in whorls; pedicels 2–3(–3.5) mm long, glabrous; without bracteole; ocreolae completely enclosing rachis, 0.8–1.2 mm long, hyaline, apex acute, margin entire without hispid hairs and bristles. Tepals white or pale green, ovate, apex obtuse or acute, without glandular dots, outer 3 1.2–1.8 by 0.4–0.8 mm, inner 3 1.5–2 by 0.8–1 mm, with 2–3 spines along margin and an ovate ambulla at middle part of outer surface, persistent. Stamens 6, in a single whorl, filaments white, 1.5–2 mm long, anthers white, elliptic. Styles 3, ca 1.4 mm long; stigmas fimbriate, white. Fruits with swollen perianth, with outer wings, 3–3.5 by 3–3.5 mm, brown.

Thailand : NORTHERN: Chiang Mai, Chiang Rai; NORTH-EASTERN: Loei, Nakhon Phanom; EASTERN: Amnat Charoen, Ubon Ratchathani.

Distribution : Europe (type), Russia, Sri Lanka, Myanmar, China, Taiwan, Mongolia, Korea, Japan, Vietnam, Java, the Philippines, Peninsular Malaysia, N America.

Ecology : In evergreen forests and along Mae Kong banks, ponds, 0–500 m alt.

Vernacular : Phak kat som (ผักกาดส้ม).