302 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



panicle of numerous laxly spreading racemes densely woolly in the axils, the 

 plump oval spikelets with lines of silky pubescence. 



Open grass land, Trinidad (Pitch Lake, Hitchcock 10094) to Brazil. Origi- 

 nally described from Brazil. 



34. REIMAROCHXOA Hitchc. 



Inflorescence of 2 to several slender racemes, approximate at the summit of 

 the culm, spreading or reflexed at maturity; spikelets strongly compressed, 

 acuminate, solitary, rather distant, subsessile, appressed to the fiat rachis, the 

 back of the fruit toward, it as in Paspalum ; both glumes wanting (or the second 

 present in the terminal spikelet) ; fruit scarcely indurate, the palea free nearly 

 half its length. 



Spikelets about 2 mm. long; racemes several 1. It. brasiliensis. 



Spikelets about 5 mm. long ; .racemes 2 or 3 2. R. oligostachya. 



1. Reiniarochloa brasiliensis (Spreng.) Hitchc. Contr. U. S. Nat. Herb. 12: 198. 



1909. 



Agrostis brasiliensis Spreng. Nov. Prov. Hal. 45. 1819. 



Reimaria conferta Nees ; Trin. Gram. Pan. 59. 1826. 



Reimaria brasiliensis Schlecht. Bot. Zeit. 10: 17. 1852. 



Panicum oxyanthum Steud. Syn. PL Glum. 1 : 41. 1854. 



A tufted stoloniferous branching perennial, the leafy ascending flowering 

 culms scarcely more than 10 cm. tall, with loose sheaths, flat rather lax blades, 

 and about 10 delicate digitate racemes, the spikelets silky along the margin. 



Wet ground around ponds, Cuba (Hanatoana and Isle of Pines) and Santo 

 Domingo to Brazil. Originally described from Brazil. The type of Reimaria 

 conferta is from Brazil ; of Panicum oxyanthum from Santo Domingo. 



2. Heimaroehloa oligostachya (Munro) Hitchc. Contr. U. S. Nat. Herb. 12: 



199. 1909. I 



Reimaria oligostachya Munro; Benth. Journ. Linn. Soc. Bot. 19: 34. 188$. 

 Stouter than the preceding, the flat culms often elongate, decumbent with 



ascending ends ; racemes 1 to 3, terminal and axillary, stiff, at maturity widely 



divergent or deflexed. 



Wet soil around ponds, Florida and Cuba (Hanabana, Wright 3854 in part). 



Originally described from eastern Florida. 



35. PASPALUM L. 



Inflorescence of 1 to many racemes, these racemose along a common axis; 

 spikelets plano-convex, subsessile along a slender or winged rachis, the back of 

 the fruit turned toward it ; first glume typically wanting, present in a few spe- 

 cies ; fertile lemma and palea chartaceous-indurate. 



Rachis with broad membranaceous wings more or less infolding the spikelets. 

 Spikelets clothed with long silky hairs ; rachis margins golden yellow. 



4. P. heterotrichon. 

 Spikelets glabrous; rachis margins green. 



Racemes numerous, approximate : 3. P. repens. 



Racemes few, distant. 



Spikelets 2 mm. long, obovate 1. P. dissectum. 



Spikelets 3.2 to 3.4 mm. long, elliptic 2. P. serratum. 



Rachis without broad membranaceous wings. 

 Spikelets with a broad stiff lacerate margin 19. P. fimbriatum. 



