Invasive Alien Species
Species Name: Hedyotis corymbosa
- Family Name:
- Hedyotis ramosa Bl.
Oldenlandia corymbosa L.
O. ramosa Roxb.
- Probably native to Africa and India
- Annual, erect or ascending herb, often branched from the base, 5-60 cm tall. Stem zig-zag or strait, obtusely-4-angled,; stipule interpetiolar, forming a short or green or pale pink sheath, apically divided into a few lobes. Leaves simple, opposite shortly petioled, one nerve, narrowly lanceolate, dull dark green above, paler beneath, 10-40 x 1.5-17 mm. Inflorescence in axillary, 2-8-flowered umbels, sometimes accompany by solitary flower; peduncles slender, 5-10 mm long; pedicels half as long or less; calyx green with numerous cystholiths, 1.8-2 mm long, 4-lobed; corolla white or very pale purple, 2 mm long, lobes 4. Stamens inserted at the base of the tube; style filiform with 2 short recurved arms, 0.5 mm long. Capsule turbinate, 1.8-2 x 2-2.5 mm; seeds numerous, ellipsoid, angular, finely reticulate, brown, 0.3 mm long
- Invaded Habitat:
- Hard or stony soil on road sides, waste places, base of walls, gardens, premises, lawns, fallow fields, rice fields, sugar cane plantations
- Throughout Indonesia
- In sunny, not to wet sites, up to 1500 m altitude. Flowers throughout the year
- Backer , C. A. & R. C. Bakhuizen Van Den Brink. 1965. Flora of Java. N.V. P. Noordhoff. Groningen, Netherlands
- Pancho, J. V. & S.R. Obien. 1983.Manual of Weeds of Tobacco Farms in the Philippines. Philippine Tobacco Research and Training Center. Mariano Marcos State University, Batac, Ilocos Norte, the Philippines
- Soerjani, M., A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.). 1987. Weeds of Rice in Indonesia. Balai Pustaka. Jakarta