GENUS 15. 



GRASS FAMILY. 



2. Paspalum dissectum L. Walter's Paspa- 

 lum. Fig. 289. 



Panicnm dissectum L. Sp. PI. 57. 1753. 

 Pasptiltim dissectum L. Sp. PI. Ed. 2, 81. 1763. 

 Paspalum membranaceum Walt. Fl. Car. 75. 1788. 



Not Lam. 1791. 

 Paspalum Walterianum Schultes, Mant. 2: 166. 1824. 



Culms erect or ascending, much branched, smooth, 

 creeping at the base. Sheaths a little inflated, 

 smooth; blades ii'-3i' long, 2"~4" wide, flat, smooth, 

 acute; racemes 3-7, alternate, about i' long, the 

 lower ones usually included in the upper sheath ; 

 rachis not exceeding the spikelets, flat, thin, i"-ii" 

 wide, acute, smooth, many-nerved, its incurved 

 margins partly enclosing the spikelets; spikelets 

 about i" long, crowded in 2 rows, oval, obtuse, 

 glabrous ; outer scales 5-nerved ; third scale lentic- 

 ular, slightly shorter than the outer ones. 



Moist or wet grounds, or sometimes in water, New 

 Jersey to Florida and Texas. Sept. 



3. Paspalum longipedunculatum Le Conte. 

 Long-stalked Paspalum. Fig. 290. 



Paspalum longipedunculatum Le Conte, Journ. de Phys. 91 : 



284. 1820. 

 Paspalum ciliatifolium brevifolium Vasey, Proc. Phila. Acad. 



Sci. 1886: 285. 1886. 



Stems io'-2i tall, leafy at the base. Sheaths gla- 

 brous, excepting on the ciliate margin; blades i'-4' long, 

 2"-4i" wide, lanceolate to linear, glabrous, or shortly 

 appressed-pubescent on the upper surface, ciliate along 

 the margins and the mid-nerve; peduncles 1-2 from the 

 upper sheath; racemes I or 2, i'~3' long, more or less 

 curved, the rachis very narrow, more or less flexuous; 

 spikelets in pairs, about I" long, broadly obovate, the 

 first scale 3-nerved, glabrous, the second 2-nerved by the 

 suppression of the midnerve, glabrous. 



Sandy soil, North Carolina and Kentucky to Florida. 

 Aug.-Sept. 



4. Paspalum stramineum Nash. Straw- 

 colored Paspalum. Fig. 291. 



Paspalum stramineum Nash, in Britton, Man. 74. 

 1901. 



A tufted branching perennial, with light 

 yellowish green foliage, flat leaf-blades which 

 are appressed-pubescent on the upper surface, 

 and usually pubescent spikelets ; culms 8'-3 tall ; 

 leaf-sheaths glabrous, excepting on the ciliate 

 margins, the basal ones softly and densely pubes- 

 cent ; blades firm, erect, linear or lanceolate, 

 with a few scattered long hairs in addition to the 

 shorter pubescence on the upper surface, long- 

 ciliate on the margins, 10' long or less, 2i"-s" 

 wide; racemes 1^-4' long, on the main culm 

 usually 2; spikelets in pairs, orbicular, about i" in 

 diameter, the first scale 3-nerved, pubescent with 

 short spreading glandular-tipped hairs, or some- 

 times glabrous, the second scale glabrous or nearly 

 so, 2-nerved by the suppression of the midnerve. 



In sandy places and fields, Nebraska and Mis- 

 souri to Texas. Aug. and Sept. 



