2S: TRISETUM. Br. Kth.
1. T. subspicatum, Beauv.—Richards. App. ed. 2. p. 3. Br. in Parry's lsf Voy. App.
p. 292.—Trisetum airoides, R . §’ S.—T. molle, Kth.—Gray, Gram, et Cyp. Part II. n.
166.— Trin. Act. Petrop.—A vena mollis, Mx.
H a b . Canada? Mx. Labrador. Dr Morrison. Rocky Mountains, Drummond, to the Arctic Sea-shore
and Islands. D r Richardson. Sir E. Parry.—A variable plant, in size, from 4 inches to a foot high, in the
denseness or laxness of the inflorescence, in the hairiness, and in the more or less purple colour of the glumes.
2. T. cemuum; panicula laxa nutante, glumis tri-quadrifloris superiore paulo longiore
(triple latiore,) pilis calli brevibus, racheos medium valvulse attingentibus, perianthiis
bisubulatis supra medium longe aristatis, ovario barbato. Trin. in Act. Petrop. 1830. 6.
61. Bong. Veg. Sitcha, p. 54.—Avena cernua, Kunth, Agrost.p. 306.
H a b . Sitcha. Mertens. Columbia River. Dr Scouler.—Our Scoulerian specimen precisely accords with
an authentic one in my herbarium from the Imperial Academy of Petersburg. It is a tall growing
grass, 2-3 feet and more high, with leaves more than half an inch broad. The panicle almost a foot long,
the branches slender, drooping, lax, the awn very long and slender, the outer valve of the perianth has the
two terminal teeth long, and remarkably slender.
29. AVENA. L.
1. A. versicolor, Fill. Delph. 2. p. 142. t. 4 ./. 5. Kth. Agrost. p. 300.—A. Scheuchzeri,
Poll.—Host, Gram. 2. p. 52.
H a b . Rocky Mountains. Drummond.—The only difference I can perceive between these specimens and
European ones, is that the panicle is longer~(3 to 5 inches) and the spikelets more erect.
2. A. striata (Mx.); panicula subsimplici erectiuscula, spiculis 3-4-floris, flosculis basi
barbatis superiore saepe tabescente, glumis inasqualibus laevissimis, perianthii valvula ext.
coriacea 7-nervia, glabra bicuspidata cuspidibus subulatis, arista subtortili perianthio
subduplo longiore, foliis lineari-acuminatis angustis, ligulabrevi truncata. Mx. Am. 1. p.
23.—Trisetum purpurascens, Torr. FI. l.p . 127. Gray, Gram, et Cyp. Part I. n. 46.
H a b . Montreal. Paine. (Torrey). Canada to the Saskatchewan and to the Rocky* Mountains.__The
limits between Avena and Trisetum do not appear to be well defined : but the habit of the present species
(most distinct indeed in point of specific character) is so much that of the preceding, that I think it more
natural to place it with the Avenee.
30. DANTHONIA. De Cand.
1. D . spicata, R . et S— Gray, Gram, et Cyp. Part II. n. 11*7. Trin. Ic. Gram. 5. t.
54.—Avena, L .—Ph.— Avena glumacea, Mx.
H a b . Saskatchewan to Hudson’s Bay. Dr Richardson. Drummond.
IX . F estucace®.
31. POA. L.
1. P . borealis; culmo erecto subramoso compresso vaginisque glabris, foliis planis
innovationum distichis scabris, panicula secunda spicasformi simplicissima erecta, spiculis
lanceolatis sub-10-floris, glumis inasqualibus paleisque inferioribus 9-nerviis glaberrimis
superiores sequantibus. K th.—Brizopyrum boreale, Presl, in Reliq. Haenk. 1. p. 280.
H a b . Nutka Sound. (Haenk. ) .jie
2. P . capillaris, L .—M x.—Ph. FI. l .p . *74.—Eragrostis, Nees.
Hab. Canada. Ph.; but I have never seen specimens from British America.
3. P . reptans, M x. Am. l . p . 6. t. 11. Torr. FI. l .p . 14. G ray, Gram, et Cyp. P art
I. n. 52.—Eragrostis, Nees.
H ab . Sandy banks of streams, N. W. Am. Douglas.
4. P.fasciculata? Torr. Fl. l .p . 107.
H ab. Carlton House Fort on the Saskatchawan. Drummond.—The foliage, culms, and general aspect of
this plant are quite the same as those of Dr Torrey’s P. fasciculata : but the panicles have more regularly
erect and shorter branches, and the glumes are longer and sharper. It is probably a distinct species.
5. P . annua, L .— E . Bot. t. 1141. Torr. F l. l . p . 107.
H ab. Newfoundland. Dr Morrison. Saskatchawan, and York Factory, and Hudson’s Bay. Dr Richardson.
Drummond. Columbia. Dr Scouler.
6. P./estuceeJbrmis, Host, Gram. Avoir. 3. t. 17.— Poa arenaria, var. fi. festucseformis.
Trin. in Act. Petrop. 6. 1. 390. Bongard, Veg. Sitcha, p . 55.— Festuca Hostii, Kth. Enum.
p . 393.
H ab. Sitcha. Bongard.—Abundant on Menzies’ Island, and on the low sandy banks of the Columbia.
N. W. Am. Douglas.—Host’s figure is an excellent representation of our plant.
7. P . distans, L .—E . Bot. t. 986.—Festuca, Kth.
H a b . Observatory Inlet and shores of the Columbia, N. W. Am. Dr Scouler.
8. P . airoides, N utt. Gen. Am. 1. p . 68, cum descr. (non Kth.'j— P. Nuttalliana, R . et
S. Mant. 2. p . 303.
H ab. Saskatchawan to the Rocky Mountains and to Slave Lake. Dr Richardson. Drummond.—A very
distinct and well marked species.
9. P.flexuosa, Wahl.—Host, Gram. Auslr. 4. t. 26. Bongard, Veg. Sitcha, p . 55.— P.
laxa, Wahl, (fide Kth.)
H a b . Lake Winipeg to the Rocky Mountains and to the Arctic Sea-coast. Dr Richardson. Drummond.