Grasses of Porto Rico -iH? 



description in the Systema Naturae. Both authors refer the plant 

 to Jamaica, so that the plate and description of Swartz may in all 

 probability be safely taken as characterizing the Linnaean plant 

 also. The genus Hctcrostcca was. founded by Desvau.x on one 

 species, //. juncifolia. At a later date he probably became ac- 

 quainted with the Aiistida Aiiuricana Sw., for in a subsequent 

 publication (Jour, de Bot. 3: 68. 181 3) he changes the name to 

 HetcrosUca Americana, citing H. juncifolia as a synonym. 



The plant of Swartz is quite different from the one we have 

 under consideration, differing in the more numerous spikes with 

 more spikelets, and in the second flowering scale being reduced to 

 a 3-awned empty rudiment. 



30. ELF.USINE Gaertn. Fruct. i: 7. 1788 

 I. Eleusine Indic.v (L.) Gaertn. Fruct. i : 8. 1788. 



Cy no sums Indie us L. Sp. PI. 72. 1753. 



In cultivated and waste ground, common. Catano, Heller 

 no; between Ponce and Coamo, Heller 499 ; Mayaguez, Heller 

 4410; Lecheria, Goll 20. 



31. DACTYLOCTENIUM Willd. Enum. 1029. 1809 

 I. D.\CTVLOCTENiUM Aegvptium (L.) Willd. Elnum. 1029. 1809. 



Cynosurus Aegyptius L. Sp. PI. 72. 1753. 



In cultivated and waste grounds, common. Santurce, Heller 

 155 ; Mayaguez, Heller 441 1 ; Guanica, Sintenis 3469 ; Guayama, 

 Goll, 513 ; Coamo Springs, Goll 661 ; Bayamon, Underwood and 

 Griggs 900. 



12. LEPTOCHLOA Beauv. Agrost. 71,//. 15 J. i. 



1812 

 I. Leptochloa viRGATA Beauv. Agrost. 166. 181 2. 

 Moist ground near Aiiasco, Heller 4535. 



33. GYNERIUM H. c^- B. PI. Aequin. 2: 112,//. 113. 



1809 

 I. Gynerium saccharoides H. & B. PI. Aequin. 2 : \\2, pi. 113. 

 1809. 

 Along streams, Yauco, Underwood and Griggs 718. 



