23. P . rotundata ( Trin.); paniculse sublineari laxse radiis subquinis angulato-filiformi-
bus scabriusculis simpliciusculis inferne nudis, spiculis (rotundato-apertis) trifloris brevi-
pedicellatis, perianthiis obsolete nervosis lineari-ellipticis acutiusculis dorso lateribus
basique contortuplicato-villosulis, radice subrepente? Trin. in Act. Petrop. 6. 1. 378.
Kth. Enum. p. 359.
H a b . U n alaschka. ( Trinius.)
32. GLYCERIA. Br. Kth.
1. G. aquatica, Stn.—Kth.— Poa aquatica, L.—E. Bot. t. 1315. Torr. Fl. 1. p. 107.
{var. Am ericana). Gray, Gram, et Cyp. Part I. p. 58.—ß. hu mil is.
H a b . Lake Winipeg to the Saskatchawan. Dr Richardson. Drummond. Marshes near the Western
Ocean. Douglas.—ß. Rocky Mountains. Drummond.—The var. ß. is scarcely a foot high, with smaller and
less branched panicles than usual.
2. G . arctica (n. sp.); panicula erecta (statu juniori) contracta, spiculis erectis
elongatis compresso-cylindraceis 7-8-floris, glumis inasqualibus flosculo inferiore breviori-
bus obtusis, perianthii valvulis tenui-membranaceis lasvibus obtusis, foliis lineari-setaceis.
(T ab. C C X X IX .)
H a b . Arctic Sea-coast. Dr Richardson.—I possess but one specimen of this plant, which is different from
any Poa or Glyceria with which I am acquainted. It is scarcely a foot high, flaccid; leaves much tufted at
the base, a span long. Culm leafy to the top. Panicle 3 inches long, erect. Florets distichous, erect,
slightly imbricated, green, tipped with reddish-purple; texture of the glumes thin and membranaceous.
T a b . CCXXIX.—Fig. 1. Spikelet; f . 2. Glumes; ƒ 3. Florets :—magnified.
3. G.fluitans, Br.— Torr. FI. 1. p. 106. Gray, Gram, et Cyp. Part I. n. 48.—G. spec-
tabilis, M. et K. FI. Germ.— Bongard, Veg. Sitcha, p. 54.—Festuca fluit. L.—Poa, E. Bot.
t. 1520.~Mx.
H a b . Saskatchawan. Drummond.
4. G. pauciflora (Presl),* panicula erecta composita paten tissima, spiculis 4-floris pa-
tentibus, glumis rotundatis uninerviis, palea inferiore quinquenervia, radice repente. Presl,
in Reliq. Haenk. 1. p. 257.
H ab. Nutka Sound.—“ Affinis G.fiuitanti, sed distincta.” Presl.
5. G. nervata, Trin. in Act. Petrop. 6 .1 . 365.— G. Michauxii, Kth. Gram. 1. 118. 343.
t. 85.— P oa nervata, Willd.— Ph.— Torr.— G ray, Gram, et Cyp. Part II. n. 57.— P .
striata, Mx.
H a b . Rocky Mountains. Drummond.
6. G . elongata, Trin.— P oa elongata, Torr. Fl. 1. p. 122. (non Willd.)— P . T o rreyana,
Spreng___Gray, Gram, et Cyp. Part II. n. 56. Kth. Enum. p. 333.
H ab . Canada. Mrs Perceval.
7. G.obtusa, Trin.— P o a o b tu sa , Muhl.— TorreyFl. \.p. 112. {nonNutt.) Gray, Gram,
et Cyp. Part II. n. 55.
H a b . Canada. Goldie.
8. G. Canadensis, Trin.— P oa Canadensis, Torr. Fl. p. 112. Gray, Gram, et Cyp.
Part II. n. 121.— B riza Canadensis, Mx.
H ab . Canada. Goldie. Saskatchawan. Dr Richardson. Drummond.
33. PLEUROPOGON. Br.
1. P. Sabinii, Br. in Parry’s 1st Voy. App. p. clxxxix. t. D . f. 1-10.—a. elatior; sub-
spithamæus, antheris stramineis. f. 1— 7.— ß.humilior; 3-4 uncialis, antheris purpureis. f.
8- 10.
H a b . Melville Island. Capt. Sabine.
34. REBOULEA. Kth.
1. R . gracilis, Kth. Gram. 1. p. 341. t. 84.— Aira obtusata, et A . melicoides, M x. Ph.
—Koeleria Pennsylvanica, DC.— Torr. Fl. 1. p . 116. {fide Kth.)—K . truncata, Torr.
1. c.p . 116. Gray, Gram, et Cyp. 1. n. 4 4 .—A ira truncata, Mx.
H a b . Near the Falls of Niagara. B. D. Greene, Esq. Saskatchawan to the Rocky Mountains. Dr
Richardson. Drummond.
35. CATABROSA. P.^Beauv.
1. C. aquatica, P . Beauv. Agrost. p . 97. t. 19. f . 8.—A ira aquatica, L .—E . Bot. t.
1557.
H a b . York Factory, Hudson’s Bay to the Rocky Mountains. Drummond.
36. KOELERIA. Pers.
1. K. cristata, Pers.— Gray, Gram, et Cyp. Part I. n. 45.— Torr.—Kth.— A ira cristata,
L .— E . Bot. t. 648.
H a b . Lake Winipeg and the Red River to the Saskatchawan and to the Rocky Mountains. D r Richardson.
Douglas. Drummond. Arid gravelly soils near the confluence of the Columbia with the sea. Douglas.
87. FESTUCA. L .
1. F. Myurus, L .—E . Bot. t. 1412.
H a b . Menzies Island and shores of the Columbia River. N. W. Am. Douglas. Dr Scouler.
2. F. occidentaliss glaberrima, panicula composita erectiuscula laxa, spiculis 4-floris,
flosculis stipitatis laxe imbricatis subcylindraceis, glumis parvis valde inaequalibus apice
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