340 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



(Montague. Grosmond). Originally described from Virginia. The type of Pan- 

 icum ffibbum is from South Carolina, that of Panicum aquaticum from Bermuda. 



2. Sacciolepis vilvoides iTrin.') Chase. Proc Biol. Soe. Wi shington 21: 7. 11 )8. 



I :■• Trin. Gram. Pan. 171. 1826. 

 Hi e fluviatiiis Nees. Agrost. Bras. 273. 1829. 



A tall aquatic glabrous perennial with succulent unbranched culms and 

 elongate linear blades ; panicles about S mm. wide and 15 to 50 cm. long. 



i ips, Cuba (Pinar del Bio. Isle of Pines) and northern South America. 

 Originally described from Brazil, the type of H s also from 



Brazil. 



3. Sacciolepis mynros (Lam.] Chase. Proc. Bioi Soc. Wi shington 21: 7. 1906. 



Par. . . .. iros Lam. Tabl. Encycl. 1: 172. 1791. 



Panicum myosurus Rich. Act. Soc. Hist. Nat. Paris 1: 106. 1792. 



Hi e lachne myurus Beauv. Ess. Agrost. 49. 165. 1812. 



Panicum phltijonne Tresl. Eel. Haenk. 1: 302. 1S30. 



Similar to >. les in hal it but annual, the blades most narrower, the 



panicles compae:. spikelike, about 5 mm. thick. 



Sws m] 8 and wet place?. Mexico. Cuba 'Isle of Pine?', and Trinidad (Piarco 

 Savanna, Pitch Lake^i to South America Originally described from tropical 

 America, the type being from Cayenne. Panic -us was also described 



from Cayenne: Panicum pTdeijorme from Mexico and Luzon. Grisebach * mis- 

 applies the name Hymenacl. :■:-. ft itiUi to this species. 



40. HYMENACmTE Beauv. 



Spikelets short-pedicellate in long dense spikelike or interrupted panicles: 

 spikelets acuminate: lemma and palea scarcely indurate, the margins of the 

 ma flat, the palea nor inclosed above 



Inflorescence dense, spikelike 1. H. amplexicaulis. 



Inflorescence long and narrow with ascending bran;".-:- 5 , not spikelike. 



2. H. auriculata. 



1. Hymaenachne amplexicaulis (Radge) *S"ees. Agrost. Bras. 276, 1S29. 

 Panicum amplemcaule Eudge. Pi. Gnian. 1: 21. pi. 21. 1805. 



Agr cstachya Poir. in Lam. EncycL SnppL 1: 256. 1810. 



Panicum hymenachne Desv. Opnsc. S2. 1S31. 



A glabrous aquatic perennial with succulent sparingly branching culms, 

 broad linear cordate-clasping blades, the panicles about 8 mm. thick and 20 

 to 50 cm. long. 



Swamps ai . shallow water ;cken forming pure colonies. Tropics and Sub- 

 tropics of both hemispheres. Originally lescribed from British Guiana. The 

 type of Agrc.s mostacl ' _ lenachne is from Porte Eico. 



Grisebach 1 misapplies the name E "nacfrne nyurus to this species. 



Cuba. Jamaica, Hoik. Santo I 1 •: ming :•. Porto Eico. Guadeloupe. Dominica. 

 Martinique, and Trinidad. 



2. Hymenachne auriculata (Willd. Goose. Proc. Biol. Soc. Washington 21: 5. 



Panicum auriculaium Willd. in Spreng. Syst. Veg. 1: 322. 1S25. 

 Presl, ReL Haeiik. 1: 312. 1830. 

 - la Fourn. Mex. PI. 2: 37. 1SS: 



1 Fl. Brit. W. Ind. 553. 1864. 



