172 Dr. J. D. HookEn's Enumeration of the Plants 
41. P. LoNcEPEDUNCULATUM, Leconte; fide Nees in Herb. Hook., var. foliis 
molliter pubescentibus. 
Hab. Charles Island, Charles Darwin, Esq. Albemarle Island, Mr. Macrae. 
Culmi subsolitarii, simplices, erecti, 2-3-pedales, glaberrimi. Vaginæ internodiis breviores, 
glabre, pilose v. ciliate. Folia latiuscula, plana, 5-8 unc. longa, z unc. lata, utrinque 
molliter pubescentia, marginibus ciliatis, basi barbata. Racemus elongatus, 2-5 uncia- 
lis, spicis 4-8 alternis, patentibus, 1-13 unc. longis ; rachi flexuosá, glabrá vel minuté 
scabridá, spiculis angustiore, basi interdum barbatá. Spicule sub 10, geminze, glaberri- 
mz, latè ovato-orbiculate, 7, unc. longe. Gluma inferior fusco-maculata, 3-nervis, nervis 
2 marginalibus; superior plana, medio carinata, nervis 2 marginalibus inconspicuis. 
These specimens agree with others from Brazil (Piauhy, Gardner, n. 2339) 
except that the vagine are not so hirsute, a character by no means constant 
even in the individuals from the latter country. In the * Flora Brasiliensis' 
of Martius, Nees quotes the P. longepedunculatum as a synonym of P. arena- 
rium, from which however it remarkably differs in the spikes being more 
numerous (3-6), the rachis narrower, the spiculae and glumes quite smooth, 
and in the softly pubescent surface of the leaves, which latter vary much in 
length and breadth. Our specimens again resemble those of P. supinus, 
Bosc. (Mart. /. c. p. 53), differing in the culms not being procumbent, and 
that the glumes are 3- (not 5-) nerved ; and they also resemble P. plicatulus, 
Mart. (l.c. p. 67), with the exception of the glumes being all smooth, the 
lower never undulate, and the flowers much smaller than in any of the 
numerous authentically named specimens which exist in the Hookerian Her- 
barium. 
42. Panicum COLONUM, L: 
Hab. Charles Island, Charles Darwin, Esq. 
43. SETARIA RoTTLERI, Spr. 
Hab. Albemarle Island, Mr. Macrae. 
These specimens do not differ from East Indian ones. The species is pro- 
bably of very common occurrence. 
44. SETARIA, n.sp.? A highly remarkable and distinct-looking grass, but in 
too imperfect a state to allow of my pronouncing it absolutely new. 
Hab. Albemarle Island, Mr. Macrae. 
