MAY 4, 1923 CHASE: IDENTIFICATION OF RADDI’S GRASSES 173 
denser racemes under the name P. corcovadense Raddi. Doell 
reduces P. corcovadense Raddi to a variety of P. larum Lam., changing 
the name to P. latum 6 Raddianum Doell. The type specimen of 
Paspalum laxum Lam., examined in the Paris Herbarium, however, 
proves to be a very different species, closely allied to P. glabrum Poir. 
I should take Paspalum corcovadense for the valid name of this 
species, through the description of Paspalum lanceolatum Mikan" 
is evidently drawn up in part from a specimen of this species. Dr. 
A. §. Hitchcock, who examined the Trinius Herbarium in 1907, 
found the specimen collected by Mikan in Brazil and bearing the 
name ‘‘Paspalum lanceolatum”’ to consist of two species, one of which 
is the same as Raddi’s species, but the other a species not closely 
related. ‘Trinius’s description of the vegetative part applies much 
better to the latter, as does also the number of the racemes (“12-15”), 
but the description of the spikelets applies to P. corcovadense and 
not to the acute spikelets of the plant otherwise described. Neither 
of the specimens belongs to the species figured in the Icones as P. 
corcovadense (which Doell® names P. densiflorwm Doell). Trinius 
later'® reduces P. lanceolatum Mikan (described by himself in 1821) 
to P. corcovadense Raddi (1823), and cites his own plate also. The 
description is adjusted to cover the three species. For the type of 
P. lanceolatum Mikan; Trin., I select the plant with the acute spike- 
lets, leaving P. corcovadense Raddi the valid name for the species 
represented by Gardner 138 and Mosén 3512, from Brazil. 
44, PASPALUS INAEGUIVALVIS. “In  sylvestribus prope Mata- 
Cavallos, non procul ab urbe Rio de Janeiro.”” The specimen consists 
of two plants, one lacking the base. This belongs to the species 
figured under this name by Kunth,!’ and is well represented by 
Hassler 12401 and Rojas 96 from Paraguay, and Ekman 569, from 
Misiones, Argentina. 
The specimen in the Delessert Herbarium bears a name that was 
not published. 
45. PASPALUS COMPRESSICAULIS. “In graminosis prope Rio-In- 
humirim.” The specimen consists of a complete plant of the common 
Paspalum paniculatum L. ) 
48. Piptatherum annulatum. “An var Piptatherii punctati P. B.? 
ad Fossas udas prope Rio-Janeiro.”” On the specimen is 
18 Mart. Fl. Bras. 27: 85. 1877. 
144 Trin. in Spreng. Neu. Entd. 2: 48. 1821. 
15 Mart. Fl. Bras. 2?: 51. 1877. 
16 Mem. Acad. St. Petersb. VI. Sci. Nat. 1: 155. 1834. 
17 Rév. Gram. 2: pl. 207. 1829. 
