MAY 4, 1923 CHASE: IDENTIFICATION OF RADDI’S GRASSES 171 
Brazil. The last, from Rio Janeiro, has a very immature panicle and 
is an excellent match for Raddi’s specimen. 
34, SPARTINA BRASILIENSIS. “In inundatis prope Rio-Janeiro.” 
There are two sheets of this, consisting of the upper part of a thick 
culm with inflorescence exceeded by the blades. The specimen is 
well represented by Doell’s plate’ except that the Raddi spikelets have 
a few hairs, as in Glaziou 22412, Brazil. 
36. PASPALUS OBTUSIFOLIUS. “In herbosis et humidiusculis locis 
prope Rio-Janeiro.” The specimen consists of four plants of one 
flowering culm each, the two racemes not conjugate. No stolons are 
present but the base of one suggests a stoloniferous habit. This 
species belongs to the genus Axonopus, which differs from Paspalum 
in the reversed position of the spikelets,? Axonopus obtusifolius 
(Raddi) Chase. Doell® refers this species to Paspalum furcatum 
Fliigge (Axonopus furcatus (Fliigge) Hitche.), but it is very different 
from that species, especially in the inflorescence. In that the racemes 
are conjugate and the spikelets glabrous while in Axonopus obtusifolius 
one raceme is from 0.5 to 2 em. below the other, and the spikelets 
are silky-villous at the base and with a narrow stripe of silky pubes- 
cence on the marginal internerves. Ule 975, from Brazil, agrees 
perfectly with Raddi’s specimen and shows, besides, a leafy stolon. 
39. PASPALUS ACUMINATUS. No locality is cited. The specimen 
consists of two leafy culms lacking the base, each with three racemes. 
This belongs to section Ceresia of Paspalum with broadly winged 
rachis, together with P. dissectum L., P. serratum Hitche. & Chase, 
and P. repens Berg. It is the species given as P. acuminatum Raddi 
in Hitchcock’s Mexican Grasses!’ and is well represented by Brother 
Arséne 3132, Mexico, and Hassler 10784, 11930 and 12471 from 
Paraguay. 
40. PASPALUS LONGIFLORUS P. Beauv. Fl. de Ow. II 46. t. 85?—an 
Sp. nova. No locality is given. While Raddi does not here name a 
new species, “Paspalum longiflorum Raddi” has been given in syn- 
onymy by Doell and others. The specimen in the Pisa Herbarium 
consists of two culms of Paspalum vaginatum Swartz, both exceptional 
in the number of racemes, one having three, the other five. The 
specimen in the Florence Herbarium is P. distichum L. 
41. Paspauus Fisstrouius. “Cum Paspalo obtusifolio.” (See 
above.) There are five plants on the sheet, one of two flowering culms 
7 Fl. Mart. Bras. 23: pl. 23. f. 2. 1878. 
8 See Chase, Proc. Biol. Soc. Washington 24: 129, 1911. 
9 Fl. Mart. Bras. 22: 103. 1877. 
10 Contr. U. S. Nat. Herb. 17: 230. 1913. 
