PLANTS OF SOUTHERN NEW JERSEY. 185 



c. Spikelets 4 mm. in longest diameter. P. glabratum, p. 185 



cc. Spikelets 3 mm. long or less. 



d. Plant with dense long pubescence on sheats and blades. 



P. plenipilum, p. 186 

 dd. Plant glabrous. 



e. Racemes 3-5 cm. long, leaf-blades 1-2 cm. P. lave. 



ee. Racemes 8-10' cm. long, leaf-blades, 2-4 cm. 



P. I. longifoliiitn, p. 186 

 ddd. Plant slightly pubescent below. 



e. Racemes as in P. laeve. P. I. australe, p. 186 



ee. Racemes long. P. I. circulare, p. 187 



bb. Culm branched above, with several lateral racemes, leaves pubescent. 

 c. Plants erect, with longer leaves. 



d. Spikelets 1.5. mm. long, pubescent. P. setaceum, p. 187 



dd. Spikelets 2 mm. long, glabrous. 



e. Culm glabrous. P. muhlenbergii, p. 187 



ee. Culm densely pubescent, just below the raceme. 



P. pubescens, p. 187 

 cc. Plants prostrate, with shorter leaves, spikelets 2 mm. long, pubes- 

 cent. P. psammophilum, p. 186 



Paspalum dissectum L. Walter's Paspalum. 



Paspalum dissectum Linnaeus, Sp. PI. 57. 1753 [America]. 



Paspalum membranaceum Keller and Brown 32. 



Paspalum Walterianum Gray Manual, Ed. V. 645. 1867. — Britton 279. 



This southern species was first discovered in New Jersey by 

 Thomas Nuttall, who found it at Cape May. Although it has not, 

 so far as I am aware, been found there since, it has been col- 

 lected at several points in the southwestern part of the State. 

 It occurs in low wet grounds, often on the bottoms of dried-up 

 woodland pools. 



Fl. — Mid-September into October. 



Middle District. — Clarksboro, Mickleton (NB), Pennsgrove (NB), Woods- 

 town, Riddleton. 



Cape Ma3>.— Cape May (C).* 



Paspalum glabratum (Engelm.). Engelmann's Paspalum. j 



PI. XII., Fig. 6. 

 Paspalum Aoridanum glabratum "Engelm." Vasey, Contr. U. S. Nat. Herb. 

 3:20. 1892 [N. Carolina, Texas and Arkansas]. 



* Reported from Landisville in Britton's Catalogue on authority of C. A. 

 Gross, but no specimen was found in his herbarium. 



As the work is going through the press Mr. O. H. Brown reports its re- 

 discovery at Cape May. 



t Paspalum difforme is recorded from New Jersey by Hitchcock and Chase 

 in the new Gray's Manual, but Mrs. Chase informs me that the specimen came 

 from the ballast ground at Camden, so that it is obviouslv not native. 



