136 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
siliensis.¢ Swartz’s specific name can not be taken up on account of Paspalum 
polystachyum R. Br. 
Leersia monandra Sw. Prod. 21. 1788. 
No specimens of Leersia could be found that were types or in any way authentic. 
This species and the following are probably correctly understood. This species is 
now called Homalocenchrus monandrus (Sw.) Kuntze. 
Leersia hexandra Sw. Prod. 21. 1788. 
This is now Homalocenchrus hexandrus (Sw.) Kuntze. 
Leersia oryzoides Sw. Prod. 21. 1788. 
This is based on Phalaris oryzoides L., now called Homalocenchrus oryzoides (L.) 
Poll. 
Paspalum conjugatum Berg. 
This is included by Swartz in his Prodromus (page 21). No specimen of it was 
found in the Stockholm herbarium, but there is at Madrid a specimen sent by Swartz 
which belongs to this species as usually understood. 
Paspalum vaginatum Sw. Prod. 21. 1788. 
There are two Swartz specimens, on one of which is the name in the handwriting 
of Swartz, but both are said to have come from Mauritius. They show the characters 
that distinguish this species, as described in Small’s Flora, from P. distichum L. The 
spikes are widely spreading or deflexed, the sheaths inflated, the spikelets smooth, 
the midnerve of the glume on the convex side suppressed. On one specimen the 
spikelets are 2.5 mm. long, on the other they are 4 mm. long. No specimen from 
Jamaica was found that appeared to be authentic. In the Copenhagen herbarium is 
a specimen sent by Swartz to Vahl which is without locality but is labeled Paspalum 
vaginatum. This has pubescent spikelets and corresponds to P. distichum. 
Paspalum filiforme Sw. Prod. 22. 1788. 
No specimen of this could be found in the Swartz herbarium. At Munich there 
are two sheets sent by Swartz labeled P. filiforme. One is Paspalum (Paspalus) 
caespitosum Fliigge and the other is Syntherisma setosa (Desv.) Nash.c Neither of these 
corresponds to the description of Swartz, which, as amplified in his Flora,@ is sufficient 
to identify the species. It is the species described under this name in Grisebach’s 
Flora, Fligge changed the name to Paspalus swartzianus because of his own Paspalus 
filiformis (L.) Fliigge based on Panicum filiforme L.,¢ but Swartz’s name is valid, 
Paspalum decumbens Sw. Prod. 22. 1788. 
There is a specimen in the Stockholm herbarium and also specimens in the herbaria 
of Berlin and Delessert sent by Swartz. All are the species as generally understood. 
This has been called Paspalum pedunculatum Poir.,f which name must be used on 
account of Paspalum decumbens Rotth. 1778. Panicum decumbens Roem. & Schult.g 
is based upon Swartz’s species. Fournier has referred this to his genus Dimorpho- 
stachys,” but the presence of an outer glume is too variable a character to be used as the 
basis for separating this group as a genus. 
a 2°; 92. L877. 
6 Prod. Fl. Nov. Hol. 188. 1810. 
cSee Milium digitatum Sw., p. 142 below. 
@ Fl. Ind. Oce. 1: 136. 1797. 
¢ Fliigge, Mon. Pasp. 96. 1810. 
/Eneycl. Suppl. 4: 315. 1816. 
g Syst. 2: 429. 1817. 
h D. pedunculata (Poir.) Fourn, Mex. Pl. 2: 15. 1886. 
