HITCHCOCK GRASSES OF CUBA. 199 



bears the secondary number 20(J. The specimen in the Gray Herbarium is labeled, 

 "Wet savannas, Candelaria, June 5, 1860-64." The type of Panicum oxyanthum 

 Steud. labeled "Ins.' St. Domingo, Legit Poiteau 1802 cf. hrbr Delessert 54" in the 

 museum at Paris, is a small specimen of this species; that in the Delessert Herbarium 

 is a good specimen. 



2. Reimarochloa oligostachya (Munro). 



Reimaria oligostachya Munro; Benth. Journ. Linn. Soc. 19: 34. 1882. 



Wright 3854 in National Herbarium. 



This number of Wright's is mentioned in the original description, though the 

 type is Curtiss 3566 from Florida. The specimen in the Sauvalle Herbarium with 

 the number 3854 is Paspalum vaginatum Sw. In the Grisebach Herbarium is a 

 specimen of Reimarochloa oligostachya labeled "Damp ground around ponds Hana- 

 bana," 1865, and bearing the secondary number 180. The sheet of Wright 3854 

 in the Gray Herbarium bears two plants of R. oligostachya and one of Paspalum 

 distichum. 



19. PASPALUM L. Syst. ed. 10, 855. 1759. 



Rachis dilated and membranaceous 9. P. dissectum. 



Rachis not dilated and membranaceous. 



Racemes terminal and also from the uppermost sheath. 



Blades pubescent on both surfaces 7. P. debile. 



Blades glabrous or nearly so, often ciliate on margins. 



Blades ciliate, 4 to 5 mm. wide 25. I', propinquum . 



Blades not ciliate. 



Blades less than 2 mm. wide; first glume 



obsolete 27. /'. rigidifolium. 



Blades about 1 cm. wide; first glume present. .23. P. pedunculatum. 

 Racemes terminal only. 



Racemes in pairs that is, normally 2 and approxi- 

 mate. 

 Plants with creeping rootstocks. 



Spikelets pubescent on convex surface 10. P. distichum. 



Spikelets glabrous on convex surface 30. P. vaginatum . 



Plants without creeping rootstocks. 



Both glumes obsolete 26. P. pulchellum. 



First glume only obsolete. 



Spikelets circular 1.5 mm. long or less. 



Spikelets papillose or nearly glabrous.. 22. P. papillosum. 



Spikelets villous on the margins 6. P. conjugatum. 



Spikelets lanceolate or elliptical, 2 mm. 

 long or more. 



Spikelets loosely imbricated; spikes 



ascending 15. P. lineare. 



Spikelets densely imbricated; spikes 

 spreading. 



Spikelets 2 mm. long 18. P. minus. 



Spikelets 3 mm. long 20. /'. notatum. 



Racemes 1 to several; if 2, the lower at some distance 

 below the terminal and the number not constant. 

 Racemes usually 1, sometimes 2. 

 Spikelets transversely wrinkled. 



Blades involute, glabrous, elongated, 40 



to 60 cm. long 12. P. filiform* 



Blades flat, pubescent, 5 to 15 cm. long. . . 19. /'. nanum. 



