(Waterfall) and e. and s.e. Tex., summer-fall; from Va. s. to Fla., w. to Tex. 

 and Okla. 



2. Bulbostylis juncoides (Vahl) Kukenth. Fig. 207. 

 Characters given in the generic description and the key. 



Locally frequent in rock crevices and seepy areas in Chisos and Davis Mts. in 

 the Tex. Trans-Pecos, rare in granite area of Edwards Plateau, w. to Ariz. 

 (Yavapai, Cochise, Santa Cruz and Pima cos.), summer; Tex. and Ariz., s.e. to 

 Guat.; Hisp., Bol. to Urug. and Arg. 



Our plants are referable to the var. ampliceps Kukenth. (which name is 

 probably not the earliest applicable one in the varietal rank). 



3. Bulbostylis capillaris (L.) Clarke. 



Characters given in the generic description and the key. Fimbristylis capillaris 

 (L.) Gray. 



Infrequent in sandy soil and in crevices of granitelike rocks which decompose 

 to sandy soil, seepage areas, in Okla. (Johnston Co.), e., s.e., and n.-cen. Tex. 

 and Edwards Plateau (Central Mineral Region), rare in Tex. Trans-Pecos, N.M. 

 (Dona Ana, Grant and Socorro cos.) and Ariz. (Yavapai, Greenlee, Gila, 

 Cochise, Santa Cruz and Pima cos.), spring-summer; widespread in warm-temp. 

 N.A., s. to Calif., Ariz., N.M., Okla. and the Gulf States; Tarn., Cuba, reported 

 in Chih. 



4. Bulbostylis Funckii (Steud.) C. B. Clarke. 



Similar to B. capillaris except that the spikelets are usually solitary, apical and 

 sessile in the axils of the leaves with achenes 1-1.2 mm. long, and that the leaf 

 sheaths are glabrous. 



Wet soil, in canyons, N.M. (Socorro Co.), Ariz. (Mohave, Gila, Cochise and 

 Pima COS.) and Chih., s. to cen. S.A. and the W.I. 



7. Fimbristylis Vahl 



Perennial or annual, the culms solitary or in tufts, or variously rhizomatous, 

 rigid or lax, leafy toward the base; leaves filiform to narrowly or broadly linear, 

 glabrous to pubescent, flat or involute, ligulate or eligulate, the sheaths closed 

 or partly open at maturity of the leaf; spikelets lanceolate or oblong to ovoid or 

 round in outline, terete or somewhat flattened or angled, either solitary and 

 terminal on the scapes or in simple or compound umbelliform systems involving 

 pedunculate and sessile spikelets of cymules, the whole inflorescence as well as 

 the cymules composing it often subtended by a leafy involucre; fertile scales 

 glabrous or variously pubescent, subdistichous to more often spirally arranged, 

 deciduous, all but the lowermost fertile; florets perfect; perianth absent (the flower 

 produced on a short pedicel joint which usually disarticulates with the achene); 

 stamens one to three; anthers oblong, basifixed, sometimes apiculate, the two 

 thecae at maturity longitudinally and laterally dehiscing; style 2- or 3-branched, 

 the unbranched portion flattened and fimbriate for at least a portion of its length 

 or (more rarely) subterete or angled, the style base either flattened or swollen 

 but in any event not persistent at the summit of the achene; achene lenticular 

 or trigonous; surface of achene smoothish, cancellate or warty, usually made up 

 of isodiametric or horizontally arranged rectangular cells, these either concave 

 or protuberant. 



Over 200 described species, in a variety of habitats in warm temperate to 

 tropical regions of the world. 



(Adapted from Robert Krai in Sida 4, No. 2. 1971.) 



I. Style -l-branched (2) 

 1. Style 2-branched (3) 



402 



