Those variations in this species that are considered to be distinctive and that 

 have been named are segregated here. 



Var. depauperata Tharp & Barkl. is characterized by its weak filiform stems 

 that are glabrescent to sparsely pilose, and its more or less oblanceolate sparsely 

 pubescent to sparsely pilose leaves. 



Var. frondosa Fern, has internodes strongly villous-hirsute, the large usually 

 obtuse leaves of the primary axis ovate to oval-oblong or widely elliptic and 

 3.5-8 cm. long and 2-4 cm. wide, the corolla 3-5 cm. long and the tube 1.2-3 

 cm. long. 



Var. longiflora (Gray) Fern, with stems villous-hirsute; leaves copiously villous- 

 hirsute on veins and margins; larger leaves of the main axis elliptic-oblong to 

 oblong-lanceolate, 3-6 cm. long, 1-2.5 cm. wide, obtuse to subacute at the apex; 

 corolla 5-8 cm. long, its tube 3-5 cm. long. 



Var. expansa Fern, with stems to 85 cm. high, the internodes strongly villous- 

 hirsute; larger leaves of the principal axis ovate to oval-oblong or broadly elliptic, 

 obtuse at apex, 3-7.5 cm. long, 2.5-4 cm. wide, ciliate-hirsute; corolla 5-8 cm. 

 long, the tube 3-5 cm. long. 



3. Dicliptera Juss. 



About 150 species in tropical and temperate regions of the world. The species 

 are easily recognized by their hexagonal stems and flattened bracted reduced 

 cymes. 



1. Dicliptera brachiafa (Pursh) Spreng. Fig. 719. 



Herb to 7 dm. high; stems more or less hexagonal in cross section, erect or 

 ascending, rather slender, with numerous spreading branches, from almost glabrous 

 to pilose-pubescent, rarely spreading-villous or hirsute; leaves oblong-ovate to 

 ovate-lanceolate, to 1 dm. long and 5 cm. wide, membranaceous, mostly acuminate 

 at apex, narrowed at base and decurrent on a slender petiole to 3 cm. long, 

 glabrous to pilose-pubescent; flowers clustered in the axils and more or less 

 paniculate, short-peduncled to subsessile; branches of the panicle subtended by 

 leaves similar to but smaller than those of the main stem; floral bracts varying 

 from broadly obovate to spatulate-oblong, to 7 mm. long and 4 mm. wide near 

 the middle, rounded at summit, narrowed at base; calyx subhyaline, 3-3.5 mm. 

 long, campanulate, papular-puberulous or glabrous toward base; corolla purple 

 or flesh-colored, finely pubescent, 1.5-2 cm. long; stamens partly enclosed by the 

 upper lip of the corolla and reaching to its apex, the filaments glabrous to 

 minutely pilose toward base; capsule ovoid, 5-6 mm. long, the solid stipitate 

 basal portion 1 mm. long, the tip of the capsule emarginate and apiculate, the 

 surface of capsule ciliate toward apex, the placentae separating elastically from 

 their walls and rupturing on dehiscence, sparsely pilose elsewhere; seeds 2 or 4, 

 brown, oval, flattened, about 2 mm. long and broad, essentially glabrous. Incl. 

 var. glandulosa (Scheele) Fern, and var. Ruthii Fern., Diapedium brachiatum 

 (Pursh) O. Ktze. 



In shady and moist places, in water at edge of streams and about ponds, mostly 

 in cen. and s. Tex. and Okla. (Choctaw, McCurtain and Ottowa cos.), July-Oct.; 

 from Fla. to Tex., n. to Va., Ind., Mo. and Okla. 



4. Yeatesia Small 

 A monotypic genus. 



1. Yeatesia viridiflora (Nees) Small. 



Perennial to 6 dm. high, puberulent to almost glabrous; stem erect, simple or 

 branched, slightly glaucous, when dry with a contracted ring above each node as 



1528 



