72 POACEAE 



eels, oval, about 1.8 mm. long and 1.5 mm. wide, obtusely apiculate at the apex, the outer 

 2 scales densely pubescent with short spreading glandular-tipped hairs, the first scale 3- 

 nerved, the second usually 2-nerved by the suppression of the midnerve. 

 In dry sandy soil, peninsular Florida. Summer. 



5. Paspalum stramineum Nash. Foliage light yellowish green, the spikelets, and 

 sometimes also the sheaths, pale straw color. Stems tufted, 2-8 dm. tall : basal leaf -sheaths 

 softly and densely pubescent, the remaining sheaths glabrous, excepting on the margins ; 

 blades erect or nearly so, firm, linear to lanceolate, long-ciliate on the margins, otherwise 

 glabrous except usually on the midnerve beneath, 5-25 cm. long, 5-10 mm. wide : racemes 

 4-10 cm. long, on the' main stem usually 2, rarely 1 or 3, single on the branches : spike- 

 lets in pairs, on shorter pubescent pedicels, orbicular, 2 mm. in diameter, the first scale 

 3-nerved, pubescent with short spreading glandular-tipped hairs, the second scale glabrous 

 or nearly so, 2-nerved, the midnerve suppressed. 



In sandy places and fields, Nebraska, Kansas and the Indian Territory. Summer and fall. 



6. Paspalum Chapmanii Nash. Stems tufted, 8-10 dm. tall : basal leaf-sheaths 

 pubescent, the remaining ones glabrous except on the margins ; blades glabrous on both 

 surfaces, the margins ciliate, lanceolate to linear-lanceolate, rather thin, 7-20 cm. long, 

 7-14 mm. wide : racemes 10-12 cm. long, rather slender, usually in 2's on the main stem, 

 single on the branches : spikelets in pairs on shorter pubescent pedicels, oval, 2. 2 mm. long 

 and about 1.8 mm. broad, the 2 outer scales densely pubescent with short spreading gland- 

 ular-tipped hairs, 3-nerved, or the second often 2-nerved by the suppression of the midverve. 



In dry sandy soil, Florida. Summer. 



7. Paspalum ciliatifolium Michx. Stems tufted, erect, 4-8 dm. tall, smooth and 

 glabrous : leaf-sheaths ciliate on the overlapping margin, otherwise glabrous ; blades 5-25 

 cm. long, 6-15 mm. wide, smooth and glabrous on both surfaces, the margins conspicuously 

 ciliate with long hairs : racemes single, or sometimes in 2's, 5-11 cm. long : spikelets in 

 pairs, 1.8-2.1 mm. long and 1.5-1.8 mm. broad, oval to broadly obovate, the 2 outer 

 scales 3-nerved or the second one rarely 2-nerved by the suppression of the midnerve, 

 both the scales glabrous. 



In sandy or rocky soil, District of Columbia to Alabama and Mississippi. Summer and fall. 



8. Paspalum Keiituckieiise Nash. Stems tufted, 2-5 dm. tall, slender : leaf -sheaths 

 ciliate on the overlapping margin, otherwise glabrous ; blades erect, lanceolate, 6 cm. long 

 or less, 4-10 mm. wide, glabrous on both surfaces, ciliate on the margins with hairs less 

 than 1 mm. long : racemes single or in pairs, 2-5 cm. long : spikelets about 1.6 mm. long 

 and about 1.3 mm. wide, the scales glabrous, the first scale 3-nerved, the second one usu- 

 ally 2-nerved by the suppression of the midnerve. 



In dry soil, Kentucky and Tennessee. Summer. 



9. Paspalum longepedunculatum Le Conte. Stems tufted, 2.5-8 dm. tall, smooth 

 and glabrous : leaf-sheaths glabrous excepting on the pilose margins, crowded towards the 

 base of the stem : blades 2.5-9 cm. long, rarely a little longer, 4-9 mm. broad, smooth and 

 glabrous below, pubescent above with short appressed hairs, conspicuously ciliate on the 

 margins, the hairs about 2 mm. long : racemes in 1's or 2's, 2.5-8 cm. long : spikelets in 

 pairs, 1.5-1.8 mm. long, 1-1. 2 mm. wide, broadly obovate, glabrous, the first scale 3-nerved, 

 the second 2-nerved by the suppression of the midnerve which is rarely present. 



In sandy or rocky soil, Georgia and Florida. Summer and fall. 



10. Paspalum Eggertii Nash. -Stems tufted, 3-5 dm. tall : basal leaf-sheaths pubes- 

 cent, the remainder ciliate on the overlapping margin but otherwise glabrous ; blades lan- 

 ceolate, glabrous on both surfaces and on the margins, 10 cm. long or less, 4-8 mm. wide : 

 racemes single or in pairs, 4-6 cm. long : spikelets in pairs, a little exceeding 2 mm. long 

 and about 1.5 mm. wide, oval, the first scale strongly pubescent with short spreading hairs, 

 3-nerved, the second scale usually 2-nerved by the suppression of the midnerve, sparingly 

 pubescent with similar hairs. 



On sandy ridges, Arkansas. Fall. 



11. Paspalum rigidifolium Nash. Stems tufted, erect, 3-8 dm. tall, smooth and 

 glabrous : basal leaf-sheaths softly pilose with rather long spreading hairs, the remaining 

 ones glabrous ; blades erect or ascending, rigid, linear, glabrous, 7-20 cm. long, 3-7 mm. 

 wide : racemes single, or rarely in 2's, 6-13 cm. long : spikelets in pairs, on shorter glabrous 

 or nearly glabrous pedicels, 2.3-2.5 mm. long, 1.7-2 mm. wide, oval or broadly obovate, 

 the first scale more or less pubescent with spreading hairs, o-nerved, the second scale 

 glabrous, 5-nerved, or sometimes 4-nerved by the suppression of the midnerve. 



In dry sandy soil, peninsular Florida. Spring. 



12. Paspalum epile Nash. Whole plant glabrous. Stems 6-8 dm. tall : leaf- 

 blades thick, firm, linear-lanceolate, 2 dm. long or less, 7-10 mm. wide : racemes single or 



