VII. Chloridejb. Kth.
23. SPARTINA. Schreb.
1. S. cynosuroides, Willd.—Gray, Gram. etC yp. P art II. n. 101.—Limnetis, Rich.—Ph. —Trachynotis. Mx.
H a b . Canada. Ph.
2. S. polystachya, Willd.— Gray, Gram, et Cyp. Part II. n. 102.—Trachynotis, Mx. —Limnetis, Ph.
H a b . Canada. Mrs Sheppard. Saskatchawan to Slave Lake. Dr Richardson. Drummond.—Dr Asa
Gray keeps these two Spartince distinct, in his valuable Gram, et Cyp. Americ.;—but I rather incline to
agree with those Botanists who unite them.
24. EUTRIANA. Trin.
\. E . oligostachya, Kth. Enum. p . 282.—Atheropogon oligostachys, N utt. Gen. Am .
1 .p . 78.
H a b . Plains of the Saskatchawan to the Rocky Mountains. Drummond.—This very beautiful and little
known grass, which has quite the habit of Ctenium, was first detected by Mr Nuttall on the plains of the
Missouri. It is now found as far north as the Saskatchawan, and Mr Drummond has also gathered very luxuriant
specimens of the same plant in Texas (2d. Coll. n. 223, and 334.)
VIIT. AvENACEiE. Kth.
25. DESCHAMPSIA. Reauv.
1. D . ccespitosa, Beauv.—Aira. L .—E . Bot. t. 1482.—Ph.— Torr. FI. p . 132. Gray,
Gram, et Cyp. P a rt II. n. 115.
H a b . Canada. Ph. Saskatchawan to Bear Lake. Dr Richardson. Drummond. Unalaschka. {Kth.)
2. D . brevifolia, B r. in Parry’s ls£ Voy. App. p. 291. Hook, in P arry’s 2d Voy.p. 409.
—/3. major; subpedalis.
H a b . Arctic Sea-shore and Islands.—/s. Arctic Sea-coast.—Var. A is full twice the size of and seems
almost to unite the D. brevifolia with D. ccespitosa.
26.' DUPONTIA. Br.
1. D . Fischeri, B r. in Parry’s 1st Voy. A p p .p . 291. Hook, in P arry’s 2d Voy. A p p.p .
409.—Melica. Spr.
H a b . Arctic Sea-coast and Islands. Dr Richardson. Parry. Sabine. Kotzebue’s Sound. Beechey.
27. AIRA. L.
1. A. flexdosa, L — E . Bot. t. 1519. Ph.— Torr. FI. p. 132. Gray, Gram, et Cyp.
Part I. n. 43.
H a b . Canada. Ph. Mrs Sheppard. Newfoundland and Labrador. Dr Morrison. N. W. Am. Douglas.
2. A. Danthonioides ( Trin.),• glumis perianthia ineequaliter denticulata dorso aristata
excedentibus, arista geniculata glumis longiore, foliis angustissimis. Trin. in Act. Petrop.
1830. 6. 57. Kth. Agrost. p. 290.
H ab . L ow plains of the Columbia, near Fort Vancouver. Douglas. N. W. Am. {Kth.)—A very peculiar ,
grass, of which I have seen no authentic specimen, but which I refer here at the suggestion of Dr Gray.
3. A. atro-purpurea, Wahl.—Bong. Veget.de Sitcha,p. 54.—A vena, Link.—A iraalpina,
Vahl, in FI. Dan. t. 961.
H ab. Sitcha. Bongard.
4. A. laiifolia,* panicula laxa, pedicellis scabriusculis, glumis opacis lato-ovatis acu-
minatis complicato-carinatis glaberrimis flosculos (2) superantibus, perianthii valv. ext. 4-
nervio apice 4-dentato eroso, arista infra medium inserta superiori glumis asquali inf.
breviore, foliis lato-linearibus acutis glabris. (T ab. CCXXVII.)
H ab . Rocky Mountains. Drummond.—A very remarkable species, which Drs Torrey and. Gray are disposed
to refer to Avena : but it seems to me rather to have the character of Aira. It is. remarkable for the
breadth of the leaves, and for the large, opaque (not glossy), purple-green colour of the glumes. The awns
are almost wholly included. The florets at the base, as well as the pedicel of the upper floret, are villous with
long white hairs: the inner valve of the perianth is bicarinate, with a strong nerve at each carina, and
scabrous.
T ab. CCXXVII.—Fig. 1. Spikelet; f. 2. Florets; ƒ. 3. Outer valve of the perianth ; f 4. Inner valve
do.:—magnified.
5. A . elongata; panicula longissima composita gracili, ramis appressis scabris, glumis
lineari-subulatis carinatis 3-nerviis (carina scabra) flosculos 2 multo superantibus, perianthii
valvula exteriori apice 4-dentato obsolete 4-nervio arista stricta longissima peri-
anthium m ulto superante, foliis angustissimis setaceis rigidis. (T ab. CCXXVIII.)
H ab. Sandy islands of the River Columbia. Douglas.—This, too, in the opinion of Messrs Torrey and Gray,
should be referred to Avena: but it must be recollected that everyAgrostographist has his own views respecting
the limits of Aira, Trisetum, and Avena. The present plant is very- different from every species in those
genera with which I am acquainted. Its leaves are slender and setaceous. Culms, including the panicle,
two feet and more long: of which the panicle itself occupies about one-half. The glumes are pale, tinged with
purple, glossy, the carina green and scabrous.
T ab. CCXXVIII.—Fig. 1. Spikelet; f . 2.'Florets; ƒ. 3. Outer valve of.the perianth; ƒ. 4. Inner valve
of do.:—magnified.