สำนักงานราชบัณทิตยสภา

The Journal of the Royal Institute of Thailand Volume IV - 2012 51  Sepals fused, deeply 2-lobed. Petals fused, 2-lipped, asymmetrical, 0.5-1.2 cm long, blue, deep blue, blue-violet to metallic blue; upper lip erect, smaller than lower lip, lower lip spreading horizontally to erect, metallic silvery deep blue on inner surface, palate prominent, sometimes with a white streak on either side; spur 4-7 mm long, pointing downward, slightly curved. Stamens 2. Ovary superior, of 2 carpels with 1 locule. Fruit an ovoid, dehiscent capsule. Dusita is distributed in Cambodia, Laos and Vietnam. In Thailand it is locally common in the northeastern, eastern and southeastern regions. It always grows in open, wet places, though it is a terrestrial plant amongst grasses and sedges in the fl at sandstone terrain on the wet ground fl oor of deciduous dipterocarp forest and open pine savanna. It is found growing in a variety of marshy habitats including paddy fi elds at low elevations to ca.1400 m. Flowering occurs mainly from October to December. Soi Suwanna ( สร อยสุวรรณา )- Utricularia bi fi da L. (Lentibulariaceae) A small, terrestrial, carnivorous, annual herb, 7-30 cm tall, without true roots. Stems modi fi ed into rhizoids and stolons. Rhizoids fi liform, branched. Stolons infrequent, fi liform. Digestive traps numerous, bladder-like, reniform, 0.5-1 mm long, shortly stalked, borne on rhizoids and stolons. Leaves few, arising from stolon nodes, linear, 1-3 cm long, 1-nerved, membranous. In fl orescence erect, solitary, 6 -18 cm long, 1-9- fl owered; fl owers widely spaced. Bracts at the base, ovate, 1-2 mm long, occasionally pinkish tinged. Bracteoles minute, subulate. Pedicels 3-4 mm long, erect, strongly de fl exed and enlarged in fruit. Sepals fused, deeply 2-lobed, lobes subequal, 2-4 mm long. Petals fused, 2-lipped, spurred, bright yellow, 6-10 mm long, upper lip erect, much smaller than lower lip, lower lip spreading horizontally to erect, both occasionally with red markings, palate prominent, deeper yellow; spur 3-6 mm long, facing downward, straight to slightly curved, long pointed. Stamens 2. Ovary superior, of 2 carpels with a single locule. Fruit broadly ellipsoid capsule, 2.5-3 mm, dehiscent, thin-walled. Thawatchai Santisuk