On morphological and cytological evidence, the small, white-petalled bluet described as Hedyotis crassifolia var. micrantha Shinners is given specific status as H. australis, the epithet micrantha having been previously used in that rank. The population of small, white-petalled bluets has been distinguished from Hedyotis crassifolia Raf. as var. micrantha Shinners (1950). The typical var. crassifolia, known under a number of specific epithets, including Houstonia pusilla Schoepf, H. patens Ell., and H. minima Beck, has a larger, usually blue-violet corolla. In Arkansas, Moore (1952) noted the occurrence of var. micrantha in the southern part of the state and later (1958) suggested that the variety should perhaps be raised to specific rank as Hedyotis micrantha. This binomial, as a nomen provisorium, has no legal standing. Because the same binomial had appeared previously in print we now propose the following. HEDYOTIS australis Lewis & Moore, sp. nov. Based on H. crassifolia var. micrantha Shinners, Field & Lab. 18: 100. 1950. HOLOTYPE: 7.8 miles southeast of Timpson, Shelby Co., Texas, Eula Whitehouse 20848 (SMU). H. micrantha (Shinners) Moore, Proc. Ark. Acad. Sci. 12: 12, 1958 (nomen provisorium). Not H. micrantha Hochst. ex Hiern in Oliver, Fl. Trop. Afr. 3: 60, 1877. This spring-flowering annual is common on roadsides, lawns, and other disturbed areas of Arkansas, Louisiana, and eastern and southern Texas. At most localities both H. australis Lewis & Moore and H. crassifolia Raf. can be found at anthesis during March and April. Under these circumstances, one might expect the existence of inter1Now (fall 1958) visiting Professor of Botany at the University of Saigon, Viet Nam.