Volume 14 > Part 1 > Year 2018 > Page 133 > Polygonaceae > Persicaria

6. Persicaria glabra (Willd.) M.Gómezwfo-0000488415

An. Inst. Segunda Ensenanza Habana 2: 278. 1896; Grierson & D.G.Long, Fl. Bhutan 1(1): 161. 1983; K.L.Wilson, Kew Bull. 45(4): 632. 1990; Kantachot et al., Thai Forest Bull., Bot. 38: 138. 2010.— Polygonum glabrum Willd., Sp. Pl. ed. 4, 2(1): 447. 1799; D.Don, Prodr. Fl. Nepal: 71. 1825; Meisn. In Wall., Pl. Asiat. Rar. 3: 57. 1832; Meisn. In DC., Prodr. 14(1): 114. 1856; Hook.f., Fl. Brit. India 5: 23. 1886; Trimen, Handb. Fl. Ceylon 3: 412. 1895; Courchet, Fl. Indo-Chine [P.H.Lecomte et al.] 5: 34. 1910; Craib, Contr. Fl. Siam, Dicot.: 174. 1912; Merr., Enum. Philipp. Fl. Pl. 2: 122. 1923; Steward, Contr. Gray Herb. 88: 43. 1930; K.Larsen, Dansk Bot. Arkiv 20(1–4): 53. 1961; P.H.Hô, Câyco Việtnam 1(2): 951. 1991; Philcox in Dassan. & Clayton, Revis. Handb. Fl. Ceylon 11: 400. 1997; A.J.Li et al. in C.Y. Wu et al., Fl. China 5: 288. 2003; N.T.Do in Bân, Fl. Vietnam 11: 158. 2007. Plate XIV: D.

Accepted Name : This is currently accepted.

Description : Erect or ascending herbs, 100–150 cm tall; stem and branches terete, glabrous. Leaves with petioles 1–1.5(–2) cm long; lamina (13.5–)14.5–18.5(–21) by (1.7–)2–2.6(–3) cm, ovate or elliptic-ovate, glabrous on both surfaces, punctate, base attenuate, apex acuminate or caudate, margins entire; secondary veins 20–24(–26)-paired. Ocreae cylindrical, (2.2–)2.6–3.5 cm long, scarious, glabrous, venation conspicuous, apex truncate or slightly oblique, without bristles. Inflorescences terminal and axillary, spicate panicle, (16–)21.5–30(–34.8) cm long, erect or slightly pendulous; inflorescence branches glabrous; side branches(4.5–)6–9(–10) cm long, cylindrical, dense-flowered, rachis inconspicuous; leafy bracts absent or 8–12(–15) by 0.5–1.5(–1.8) cm, ovate, apex acuminate or acute, margins entire. Flowers 4–5(–7) in an ocreola; pedicels 2.5–3.4(–4) mm long, glabrous; bracteoles (2.2–)2.5–3.4 mm long, hyaline; ocreolae completely enclosing rachis, 2.5–3(–4) mm long, glabrous, without glandular dots, apex obtuse or acute, margin entire without hispid hairs and bristles. Tepals 5, pink; lobes 1.8–2.5(–3) by 1.4–2(–2.2) mm, ovate, apex obtuse, without glandular dots, veins 3(–5); tube 0.8–1.2(–1.8) mm long, glandular nectaries (7–)8. Stamens 7(–8), in two whorls, pinkish or white, outer ones 1.3–2(–2.5) mm long, inner ones 2.4–3(–3.2) mm long; anthers white. Styles 2, 1.8–2.5(–2.8) mm long; stigmas clavate, white. Fruits with scarious perianth, lenticular, 2.3–2.6 by 1.8–2.1(–2.2) mm, shiny black.

Thailand : NORTHERN: Mae Hong Son, Chiang Mai, Sukhothai, Phitsanulok; NORTH-EASTERN: Sakon Nakhon, Khon Kaen; EASTERN: Chaiyaphum, Ubon Ratchathani; SOUTH-WESTERN: Phetchaburi; CENTRAL: Chai Nat.

Distribution : India (type), Sri Lanka, Bhutan, Bangladesh, China, Taiwan, Myanmar, Vietnam, Java, the Philippines, Australia, N & S America.

Ecology : Open marshy areas, 0–1,300 m alt.

Vernacular : Ueang (เอื้อง), phak pot (ผักปอด)(Chaiyaphum), phung phot (พุงโพด)(Phu Wiang), soi thap thim (สร้อยทับทิม).