BOTANY. 181 
tuft; at the very bottom the claw is dark purple. Differs from C. venustus in its much nar- 
rower and less bearded petals, and in wanting the red spot above the middle. 
ALLIUM CERNUUM, Roth; Kunth, Enum. 4, p. 435.  Roubideau's Pass. Differs from the 
description of A. cernuum, in the ovary bing 6-toothed, or rather with 3 short o each 
of which is 2-lobed. 
Carex VULPINOIDEA, Micha. Fl. 2, p. 69; Torr. Fl. N. York 2, p. 376. ©. multiflora, Muhl. 
in Willd. Spec. 4, p. 233; Schk. Car. t. Lll. f. 154. Between Westport ang Bent's Fort. 
SCIRPUS LINEATUS, Michæ. Fl. 1, p. 32; Torr. Cyp. p. 332. In thickets, Upper Arkansas. 
S. LACUSTRIS, Linn.; Muhl. Gram. p. 33; Torr. Cyp. p. 221. Bluff Creek. 
CYPERUS FILICULMIS, Vahl, Enum. 2, p. 328 ; ; Torr. Cyp. p. 267. C. mariscoides, Elliott, Sk. 
1, p. 67. Prairies near Fort Atkinson. 
BOUTELOUA CURTIPENDULA, Torr. in Emory s Report, p. 153. B. racemosa, Torr. Fl. N. York 
2, p. 449; not of Lag. Chloris curtipendula, Miche. Fl. 1, p. 59. Atheropogon apludoides, 
Muhl. Gram. p. 281. Prairies, Upper Arkansas. 
CHONDROSIUM OLIGOSTACHYUM, Torr. in Marcy s Report, p. 300.  Atheropogon oligostachyum, 
Nutt. Gen. 1, p. 18.  Eutriana? oligostachya, Kunth, Enum. 1, p. 96, and 2, p. 282. On the 
Upper Arkansas. 
SESLERIA DACTYLOIDES, Nutt. Gen. 1, p. 65; Kunth, Enum. 1, p. 323; Torr. in Emory's 
Report, p. 323, t. 10. With the last. The flowers are all male in the specimens of this collec- 
tion. "There are thrown out from the root, besides the upright flowering culms, long prostrate 
runners which produce short verticillate branches and tufts of leaves at the joints, where they 
also frequently strike root. i 
ÅNDROPOGON TORREYANUM, Steud. Syn. Gram. p. 302. 
A. Jamesi, Torr. in Marcy's Report, p. 302. A. glaucum, Torr. in Ann. Lyc. N. York 1, 
p. 153; not of Muhl. Sources of the Arkansas. 
SPARTINA CYNOSUROIDES, Willd. Enum. 1, p.80; Torr. Fl. N. York 2, p. 448, t. 153. Low- 
lands of the headwaters of the Arkansas. 
Tripsacum DACTYLOIDES, Linn.; Kunth, Enum. 1, p. 469; Steud. Gram. p. 362. Plains of 
the Arkansas. 
. Exymus Canapensis, Linn.; Kunth, Enum. 1.451; Torr. l. c. 476. Between Westport and 
Bent's Fort. 
PANICUM CAPILLARE, Linn.; Kunth, Enum. 1, p. 114; Torr. l. c. p. 426. With the preceding. 
Panicum Cnus-aALLr, Linn.; Torr. Fl. N. York, 2, p. 424. Damp places. Upper Arkansas. 
The flowers are hispid and mostly awnless. ' 
EXPLANATION OF THE PLATES. 
Plate I. VronA BEckwrrHm. 
Fig. 1, the petals; 2, vertical section of a flower; 3, 4, 5, stamens; 6, pistil; 7, capsule and 
calyx. All magnified. 
Plate IT. SrpALCEA CANDIDA. 
Fig. 1, vertical section of the column, ovary, &c.; 2, upper part of the stamineal column, 
entire; 3, fruit, of the emis size ; 4, fruit and calyx; 5, a mature carpel; 6, a seed. All 
but 3 ‘audited. 
