The genus Rungia Ness (Acanthaceae) has approximately 50 species in the world, mainly distributed in the tropics. They are erect or diffuse herbs. Leaves are entire. Flowers are sessile, clustered in terminal or axillary spikes. Bracts are dimorphic, 4-farious rarely 2-farious, 2-farious fertile, 2-farious often flowerless, full or partial bracts membranaceous margined. Bracteoles are similar to, equal to or smaller than bracts. Calyces are deeply 5- partite. Corolla tubes are striate and short, bilabiate, upper lips erect, minutely emarginated, entire or 2-lobed, lower lips longer, patent, 3-lobed, lobes imbricate. Stamens 2, inserted at throat. Capsules ovate or oblong, placenta with retinaculum rising from the base of valve.
In this article, we introduce the characteristics of this genus, a key to identification, and taxonomy of species in Vietnam.
Do Van Hai, Duong Duc Huyen
IEBR - VAST
(Proceedings of 3rd National Scientific Conference on Ecology and Biological Resources, Hanoi 22th October 2009 - IEBR)