Grasses of Porto Rico 381 



Vega Baja, Underwood and Griggs 955 ; Santurcc, Heller 982^^ 

 and 6442. 



5. Paxicum CONSANGUINEUM Kunth, Rev. Gram, i : 36. 1S29. 

 Sandy soil, Santurce, Heller 982. 



6. Panicum PARViFOLiUM Lam. 111. i: 173. 1791. 

 Bayamon, Sintenis 12 16. 



7. Panicum oplismenoides sp. nov. 



A smooth and glabrous prostrate leafy perennial with much 

 of the habit of Oplismciuis sctariits, with short broadly lanceolate 

 leaf-blades and spreading panicles. Stems slender, rooting at the 

 lower nodes, branching : leaves numerous ; sheaths much shorter 

 than the internodes and about one half as long as their blades ; 

 ligule a very narrow scarious ring ; blades spreading, shorter than 

 the internodes, broadly lanceolate to ovate-lanceolate, often some- 

 what undulate on the margins, 2-3 cm. long, 6-10 mm. wide : 

 panicles but little exserted, broadly ovate, 3-4 cm. long, the 

 branches spreading: spikelets elliptic, 1.8-2 mm. long and a little 

 less than i mm. broad, the first scale a little more than one half 

 as long as the spikelet, 5 -nerved, broadly ovate, obtuse, the second 

 and third about equal in length, 5 -nerved, a little exceeding the 

 white flowering scale, the third scale with a manifest palet nearly 

 as long as itself 



Collected on the edge of a ditch at Vega Baja, May 9, 1899, 

 by Heller, no. 13 16. 



Related in habit and general appearance to P. polygonoides 

 Lam., but in that the leaf-blades are smaller and with hispid 

 sheaths and the spikelets globular. 



8. Panicum maximum Jacq. Ic. PI. Rar. i : 13. 178 1-6. 

 Martin Pena, Heller 377 ; Martin Pena and Lecheria, Goll 31. 



9. Panicum paniculatum (L.). 



Paspalum paiiicnlaUivi L. Syst. Ed. 10, 855. 1759- 



Panicum fasciciilatiim Sw. Prod. 22. 1788. 



In sandy and rocky soil, frequent. Rio Piedras, Heller 135 ; 

 Aguadilla, Heller 4528 ; Sprengel ; H. Wydler 3 i i ; Adjuntas 

 road, near Ponce, Heller 6226 and 6302. 



It may be of interest to note here that the specimen from which 

 Sloane's figure (Hist. Jam. //. 72, /. 2) was drawn, and on which 

 Linnaeus based his Paspalum paniculatum, has been examined by 



