Ammannia dichotoma (Blume) S.G.Panigrahi

de Wilde, W. J. J. O. & Duyfjes, B. E. E., 2014, Ammannia (Lythraceae) in Malesia, Blumea 59 (1), pp. 11-18 : 14

4. Ammannia dichotoma (Blume) S.G.Panigrahi — Fig. 2

Ammannia dichotoma (Blume) S.G. Panigrahi (1979 , ‘1976’) 186. — Cryptotheca dichotoma Blume (1826) 1129; DC. (1828) 76; Blume (1856) 129. — Suffrenia dichotoma (Blume) Miq. (1856) 616. — Lectotype (here des- ignated): Blume s.n. (holo L, barcode L0931682), Java.

Ammannia microcarpa auct. non DC.: Decne. (1834) 453; Koehne (1880) 247; (1903) 55; Backer (1930) 465; (1964) 253; (1973) pl. 439; Soerjani et al. (1987) 340, f. 4.155.

Erect, annual, glabrous herb, 25–85 cm tall, much-branched; stem 4-angular, not winged. Leaves sessile; lamina narrowly el- liptic or linear, 1.5–7.5 by 0.2–1.2 cm, base broadened, rounded or cordate, apex acute. Inflorescences short-peduncled 3- to many-flowered cymes; peduncle 5(–10) mm long. Flowers 4-merous; pedicel 2–4 mm long, bracteoles minute; calyx tube obpyramidal, (1–) 1.5 mm long, faintly 8-ribbed, lobes triangular, acute, appendages minute; petals 4, red, obovate or circular, nearly 0.5 mm long, margin entire or somewhat toothed, cadu- cous; stamens 2, exserted, filaments red, anthers yellow; ovary ellipsoid, c. 1.5 mm long, style 1.5(–2) mm long, faintly curved; placenta 1, parietal. Capsules ellipsoid, c. 2 mm long, exserted for 1/3–1/2, style usually curved. Seeds c. 0.3 mm diam.

Distribution — Sumatra, Java, S Sulawesi, Lesser Sunda Islands (Lombok, Flores, Timor).

Habitat & Ecology — In wet and muddy places, often in rice fields; also on limestone; from sea level to 1 500 m. Flowering and fruiting all year round.

Malesian material examined. SUMATRA, Alston 13776. – JAVA, Backer 7807, 37355, s.n. L0931491 ; Bakhuizen van den Brink 1032; Beumé 5679; Blume 112b, s.n. L0931494 , s.n. L0931495 , s.n. L0931496 , s.n. L0931682 (type); Boerlage s.n. L0931489 ; Clason 186, 226, 255, 264, 266, A49 ; Coert s.n. L0931482 ; Danser 5679; Koorders 21794, 28076; Kuhl & van Hasselt s.n. L0931490 ; Nedi & Idjan 226; Winckel 1565 . – SULAWESI, Bünnemeijer 11104, 11402; Noerkas (exp. van Vuuren) 317; Robinson 2462 . – LESSER SUNDA ISLANDS, Lombok, Elbert 120,2367; Flores, Kostermans s.n. L0931467 ; Schmutz 5914; Verheijen 4456, s.n. HLB993114027 ; Timor, Kooy 501; Riedlé s.n. L0931683 ; Schmutz 2338; Teijsmann L0931475 ; Unknown s.n. L0931474 ,s.n. L0931475 ;Verheijen 2165,2166,2167;Zippelius L0931477 .