GRASSES OF Porto Rico 387 
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 Heterosteca was founded by Desvaux on one 
species, H. juncifolia. At a later date he probably became ac- 
guainted with the Aristida Americana Sw., for in a subsequent 
publication (Jour. de Bot. 3: 68. 1813) he changes the name to 
Fleterosteca 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. ELEUSINE Gaertn. Fruct. 1: 7. 1788 
1. Exeusine Inpica (L.) Gaertn. Fruct. 1: 8. 1788. 
Cynosurus Indicus L. Sp. Pl. 72. 1753. 
In cultivated and waste ground, common. Catafio, Heller 
110; between Ponce and Coamo, Heller 499; Mayaguez, Heller 
4410; Lecheria, Goll 20. 
31. DACTYLOCTENIUM Willd. Enum. 1029. 1809 
1. DactyLocrenium Arcyptium (L.) Willd. Enum. 1029. 1809. 
Cynosurus Aegyptius L. Sp. Pl. 72. 1753. 
In cultivated and waste grounds, common. Santurce, Heller 
155; Mayaguez, Heller 4411 ; Guanica, Sintenis 3469 ; Guayama, 
Goll, 513 ; Coamo Springs, Goll 661 ; Bayamon, Underwood and 
Griggs 900. 
32. LEPTOCHLOA Beauv. Agrost. 71, pl. 75, f. I. 
1812 
1. LEPTOCHLOA vIRGATA Beauv. Agrost. 166. 1812. 
Moist ground near Afiasco, Heller 4535. 
33. GYNERIUM H. & B. Pl, Aequin. 2: 112, p/. 175. 
1809 
1. GYNERIUM sAccHAROIDES H. & B. Pl. Aequin. 2: 112, p/. 175. 
1809. 
Along streams, Yauco, Underwood and Griggs 718. 
