bably deliquesces, while the upper seems to adhere, by a glutinous substance, to the crest of the ovary,
and then the portion above the ovary seems to have its origin from the top of that body, and to continue there
till nearly the perfection of the fruit. The hypogynous scales are 2, broadly obovate, large, but so thin and
delicate, that I cannot trace them in the more advanced state of the flower. From an examination of more
than one spikelet, it would appear that the lower florets bear abortive stamens, with small and short anthers ;
the upper ones abortive pistils, with very large linear anthers. In both, the inner valve of the perianth
adheres to the ovary as it advances to maturity.
T a b . CCXXXV.—Fig. 1. Spikelet; ƒ. 2. More advanced do.; f . 3. Inner view of inner valve of the
perianth; f . 4. Ovary and stamens from a lower floret; ƒ 5. Do., and hypogynous scales from an upper
floret:—magnified.
40. BRIZOPYRUM. Presl.
1. B. spicatum, Hook, et Am . Bot. o f Beech. Voy. p. 403.—B. boreale, Brest, in Beliq.
Haenk. 1. p. 280.—Uniola spicata, L .— Torr. FI. 1. p. 105. Gray, Gram, et Cyp. Part I.
n. 49.—U. stricta, Torr. in Am. o f Lye. l.p . 55.—U. multiflora, Nutt.— Festuca disticho-
phylla, Mx.—Ph.—Poa Michauxii, Kth. Enum. p . 325.
H ab . Plains of the Red and Saskatchawan Rivers, to the Rocky Mountains. Dr Richardson. Drummond.
Douglas. De Fuca, N. W. Coast. Dr Scouler. Nutka. Mertens.—We have observed in the Botany of
Beechey’s Voyage, that this plant is bisexual, and there is a slight difference between the flowers of the two
sexes, which has led to the separation of the species.
41. TRITICUM. L.
1. T. (Agropyrum) junceum, L .—E . Bot. t. 814.
H ab . Rocky Mountains. Drummond. Low plains of the Columbia. Douglas.
2. T. (Agropyrum) repens, L .—E . Bot. t. 909. Torr. FI. 1. 135.—a. vulgare.—/S.
minus; spica breviore.“ y. purpurascens; spica parva, spiculis purpurascentibus, flosculis
aristatis.—8. subvillosum; spica elongata, spiculis subvillosis.—e. nanum; spica breviore,
flosculis subsericeo-villosis.— £. dasystachyum; elatum, spicis majoribus, spiculis dense
sericeo-villosis.
H a b . a. Saskatchawan to the Rocky Mountains and to the Mackenzie River. Dr Richardson. Drummond.
Arid barren grounds at the junction of Lewis and Clarke’s Rivers with the Columbia.—0. Rocky Mountains.
Drummond.—y. Bear Lake to the Arctic sea-coast. Dr Richardson.—S. Fort Norman, on the Mackenzie
River. Dr Richardson.—s. Arctic sea-coast. Dr Richardson.—?. Carlton House Fort, on the Saskatchawan.
D r Richardson.—All the above I am quite disposed to consider as mere forms of one and the same species,
varying according to soil, locality, &c. The last var., dasystachyum, very much resembles the T. dasyanthum,
Spr. (Agropyrum, Schultes Mant.p. 400.) but that from its obtuse florets and involute leaves, I would rather
refer to a hairy state of T. junceum.
3. T. (Agropyrum) caninum, Schreb.—E. Bot. t. 1372. Torr. FI. 1. p. 136.—(3.
Gmelini (Ledeb.); aristis validis demum patenti-reflexis. Ledeb. Ic. PI. Boss. Altaic.
IUustr. t. 248.—Bromus strigosus. Bieb.
H a b . Lake Winipeg to the Saskatchawan. Dr Richardson. Drummond. Plains of the Multnomak
river, N. W. Am. Douglas.—0. Near the great falls of the Columbia, N. W. Am.. Douglas.—The var. 0.
has so remarkable an appearance from its strong horizontal, almost reflexed awns, that at first sight, I did not
hesitate to consider.it a distinct species, as others have done with the same state of the. plant: for it is,
according to authentic specimens in my Herbarium, the Agropyrum tegilopoides of Ledebour’s mst. (in Herb,
nostr.) from the Altai; and .the Bromus strigosus, Rich, from the mountains of Tauria; but Ledebour has
determined correctly, we doubt not, that it is a variety of T. caninum.
42. ELYMUS. L.
1. E . arenarius, L .—E . Bot. t. 1672. Hook, et Am. Bot. of Beech. Voy. pp. 119, 132.
H ab. Canada. (Quebec.) Mrs Perceval. Labrador. Dr Morrison. Miss Brenton. Saskatchawan to
Bear Lake, and the extreme Arcti,c shores and islands. Dr Richardson. Drummond. Sir E . Parry. N.
W. Am. from the Columbia to Kotzebue’s Sound. Dr Scouler. Douglas. Capt. Beechey.
2. E. mollis, Br. in Frankl. Journ. ed. 2. App. p. 3.—E . mollis, Trin. in Spreng. N .
Entd. 2. 72? Bong. Veget. Sitcha, p. 56 ?—E. dasystachys. Trin. in Ledeb. Ic. PI. Boss.
Alt. Illustr. t. 249.—p. spicis minoribus hirsutissimis, spiculis 2-3 floris.
H ab . Saskatchawan to Bear Lake and the Arctic shores, and 0. Garry’s island. Dr Richardson. Drummond.—
Ledebour’s E . dasystachys, from the Altaic mountains, is precisely the same as our E . mollis ; and his
0. of that plant seems to be the same as our 0. The flowers of the largest specimens are always smaller than
those of E. arenarius, which has nevertheless frequently very soft and hairy spikes. I have never seen
authentic specimens of the E. mollis of Trinius; Bongard says that it scarcely differs from E . arenarius,
except in its plane leaves.
3. E. hirsutus (Presl); culmo compresso ? vaginisque glabris, foliis scabris subtus hir-
sutis, spica erecta, spiculisdiirtis trifloris, glumis sub-quinquenerviis, palea inferiore quin-
quenervia scabra arista breviore. Presl, in Beliq. Haenk. 1. p. 264.
H ab. Nutka Sound. (Presl).—Affinis E . Europmo (Presl).
4. E. Sibiricus, L .—Bong. Veget. Sitcha, p. 56. Schreb. Gram. 1. t. 2 1 ./. 1. Gmel. Sib.
1. t. 28.
H a b . Sitcha. Mertens.—“ Flosculi et involucella in gramine harum regionum superne ciliatuli.” Bong.
5. E. Canadensis, L .—Ph.— Torr. FI. 1. p. 137. Bich. App. p. 3. Gray, Gram, et Cyp.
Part I. n. 63.—E. Philadelphicus. L .—E. glaucifolius. Willd. Ph.—(3. spicis fusces-
centibus dense villosis.
H ab. -Canada to the Saskatchawan. Drummond. Slave River. Dr Richardson.—0. Rocky Mountains.
Drummond.—This should be compared with authentic specimens of E . Sibiricus. What I have from
Ledebour as that species, does not seem to differ ; but .the spikes are jn a starved state, while those from
Gouan’s Herbarium are precisely the same. The figures of Gmelin and Schreber by no means disagree
with our E . Canadensis.
6. E. Virginicus, L .—Mx.—Ph.—Torr. FI. 1. p. 137. Gray, Gram, et Cyp. Part I.
n. 60.—(3. submuticus; glumis flosculisque brevissime aristatis.