NORTH AMERICAN SPECIES OF RHYNCHOSPORA. 
Schonus miliaceus, Lam. Jil. Gen. v. 1. 
p. 197.—8. sparsus, Mz. FI. v. 1. p. 35. 
Muhl. Gram.p. 7 .—R.sparsa, Vahl, Enum. 
v. JT. p. 230. Pursh, Fl. v. I. p. 48. Reem. 
et Sch. Syst. Veg. v. I. p. 83, Mant. 
v. IT. p. 45. Elliott, Bot. S. Car. et Georg. 
v. T. p. 62. tab. 2. Torrey, Fl. v. L p. 56. 
Spreng. Syst. Veget. v. I. p. 195. 
Whole plant smooth and somewhat 
glaucous. Culm two feet high, triangular, 
fistulose, very leafy below. Lower leaves 
linear-lanceolate, eight to sixteen inches 
long, three to four lines wide; the upper 
ones two to three inches in length, linear. 
Panicles corymbose, compound, diffuse, 
five to seven, on subexserted peduncles. 
Spikelets ovate, turgid, (** vix Don 
seminis Mili" Ram. et Sch.) borne on 
slender pedicels, half an inch long, each 
spikelet perfecting four to six nuts. Glumes 
fuscous, very caducous, ovate, carinate. 
Bristles six, about one-third longer than 
the nut, somewhat caducous, hispid up- 
ward. Style bifid. Nut about half a line 
long, tumidly obovate or ovate, crowned 
with a depressed-conie tubercle, scarcely 
one-fourth its length. 
Has. Wet soils, in pine barrens gene- 
rally; N. Carolina, Georgia, and New Or- 
leans. : 
Oss. This species is also a native of 
Puerto Rico, where it was collected by 
Bertero. I have adopted the specific name 
of Lamarck, on account of its priority. 
.5. R. caduca (Ell.); culmo triquetro, 
paniculis axillaribus terminalibusque erec- 
tis, spiculis ovatis, nuce orbiculato-ovata 
paululum plano-convexa transversim rugu- 
losa basi subattenuata tuberculum exce- 
dente setis sursum hispidis subduplo bre- 
viore. 
R. caduca, Ell, Bot. S. Car. et Georg. 
v. I. p. 62. Rem. et Schult. Mant. v. II. 
p.9l. Spreng. Syst. Veget. p. 196. 
Culm acutely triangular, one to two feet 
high. Leaves broadly linear, two to three 
lines wide, glabrous. Panicles corymbose, 
with the flowers somewhat crowded, on 
peduncles twice as long as the sheaths. 
— ovate, acute, nearly twice as —— 
as in R. cymosa, pedicellate or 
29 . 
Glumes caducous; exterior ones broadly 
ovate, carinate, with a short mucro; the 
interior ones longest, acute.  Bristles six, 
twice the length of the nut, hispid upward. 
Stamens three. Style long, slightly bifid. 
Nut a line long, somewhat plano-convex, 
crowned with a compressed-conic tubercle, 
nearly one-third its length. ' 
Has. Wet soil, Charleston, S. Caro- 
lina, N. Carolina, and at St. John’s, 
Florida 
Ons. “ This species is nearly allied to 
R. sparsa (R. miliacea, nob.), from which 
it differs in having its spikelets larger, 
clustered, and its panicle rather appressed 
than diffused. It is also remarkable for 
the facility with which it drops its mature 
glumes, so that in a specimen where the 
seeds are perfect, many of them will be 
found naked, adhering to their pedicels." 
Ell. l. c. It is also closely allied to R. cy- 
mosa, but 1s readily distinguished from that 
species by its larger, often pedicellate 
spikelets, plano-convex fruit, and longer 
bristles. 
6. R. inezpansa (Vahl); culmo sub- 
triquetro debili, paniculis subsparsifloris 
ramulis approximato-erectis, spiculis fusi- 
formibus, nuce oblonga compressa trans- 
versim rugosa setis sursum hispidis dimi- 
dio longiori, tuberculo nuce snis an bre- 
viore. 
R. inexpansa, Vahl, Enum. v. II. p.233, 
Ell. Bot. S. Car. et Georg. v. I. p. 61. 
Schenus inexpansus, Mx. FI. v. I. p. 
35, et Herb.! Muhl.! Gram. p. 9. 
Culm one and a half to two feet high, 
obscurely triangular, slender, somewhat 
nodding. eaves narrow-linear, smooth, 
and short; cauline ones rather remote, as 
long as the internodes. Panicles two to 
four, on filiform subpendulous peduncles. 
Spikelets fusiform, subfasciculate. Glumes 
fuscous, ovate, acute. Bristles six, twice 
as long as the nut, hispid upward. Stamens 
three. Style long, deeply bifid. Mut ob- 
long, compressed, evenly rugose. Tuber- 
cle compressed, acute, with the base abow 
sessile. the width of the summit of the nut. 
