Tas. PROCEEDINGS OF THE AMERICAN ACADEMY. 
Panicum, L. 
P. cotonum, L. Syst. ed. 10, 870 (1760) ; Trin. Ie. ii. t. 160 ; Hook. 
f. (3), 172. Oplismenus colonus, HBK. Nov. Gen. & Sp. i. 108 
(1815); Anderss. (1), 136, & (2), 45.— Cuartes Ist.: Darwin ; in 
somewhat swampy places, middle region, Andersson. Further distrib. 
general in trop. regions. 
P. rascicuLaTum, Sw. Prodr. 22 (1788), & Fl. Ind. Occ. i. 145; 
Anderss. (1), 185, & (2), 44. — Cuartes Isz.: Snodgrass & Heller, 
no. 455 (hb. Gr.). InpeFraTiGABLE Ist.: Andersson; northern part, 
Snodgrass & Heller, no. 649 (hb. Gr.). James Isi.: common on sea-bluff 
on James Bay, Snodgrass & Heller, no. 392 (bb. aE): Further distrib. 
W. Ind., S. Am. 
P. FLuitans, Retz. Obs. iii. 8 (1783); Anderss. (1), 136, & (2), 45. 
P. paspalodes, Pers. Syn. i. 81 (1805). P. paspaloides, auct.— 
Cuatuam Ist.: in stagnant pools, middle region, Andersson (bb. Gr.) 
Snodgrass & Heller, no. 557 (hb. Gr.). Hoop Ist.: on the margin of 
a mud lake, Snodgrass & Heller, no. 746 (hb. Gr.). Further distrib. 
W. Ind., S. Am., trop. of Old World. 
P. ruscum, Sw. Prodr. 23 (1788); Anderss. (1), 135, & (2), 44; 
Caruel (1), 621; Rose (1), 188. — Cuarces Ist. : Andersson ; Chierchia. 
CuaTHam Ist.: Andersson ; A. Agassiz. Further distrib. W. Ind., 5. 
Am. Andersson, ll. cc., distinguishes three forms or varieties: vegetivs, 
Jirmius, and pubescens, 
P. uirticautum, J. & C. Presl, Rel. Haenk. i. 308 (1830) ; Kunth, 
Enum. i. 101; P. hirticaulon, Anderss. (1), 1384, & (2), 43 (incl. var. 
majus, typical, and var. glabrescens, not very clearly marked) ; Rose 
(1), 188; Rob. & Greenm. (1), 148; a species sometimes reduced to 
P. -ayennense, Lam, — Barrineton Ist.: Snodgrass & Heller, no. 
492 (hb.Gr.), Cartes Ist.: Andersson. CuatTuam Isx.: Andersson ; 
(hb. Gr.) ; A. Agassiz ; Snodgrass & Heller, no. 548 (hb. Gr.). GaRD- 
NER Isx.: Snodgrass & Heller, no. 648 (hb. Gr.). Hoop Isi.: Baur, 
no. 345 (hb. Gr.); Snodgrass & Heller, no. 722 (hb. Gr.). INDEFATI- 
GABLE Ist. : Andersson (hb. Gr.); northern part, Snodgrass & Heller, 
no. 661 (hb. Gr.). Seymour Ist. : north, Snodgrass & Heller, no. 565 
(hb. Gr.) ; south, Snodgrass & Heller, no. 612 (hb. Gr.). It is note- 
worthy that this grass, now widely distributed and apparently common in 
the archipelago, was not noted or collected by Darwin or any of the 
earlier collectors upon the islands, a fact which strongly suggests recent 
introduction. Further distrib. Mex. 
