254. GR AMINES. ITriticum, 



• * . ■ 



bably deliquesces, while the upper seems to adhere, by a glutinous substance, to the crest of the ovarj% 



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 tlie 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. 



+ 



Tab. CCXXXV. — Fig, 1. Spikelet ; /. 2. More advanced do. ; f. 3. Inner view of inner valve of the 

 perianth; f, 4. Ovary and stamens from a lower floret ; ^. 5. Do,, and hypogynous scales from an upper 

 floret : — magnified, 



40. BRIZOPYRUM. Presl 



I ^ ' 



I. B, spicatutriy HooL et Am, BoL of Beech, Voy,p. 403. — B.borealcj Presiy in Reliq, 

 Haenk. I, p. 280. — Uniola spicata, i. — Torr. FL \.p, 105. Gray, Gram, et Cyp.Fartl, 

 ». 49. — U. stricta, Torr, in Am, of Lye. \,p. 55. — U. miiltiflora, Nutt. — Festuca disticho- 

 phylla, Mx, — Ph, — Poa Michauxiij Kth. Eimm. p. 325. 



Hab. Plains of the Red and Saskatchawan Rivers, to the Rocky Mountains. Dr Richardson. Brummond. 

 Douglas. De Fuca, N. W. Coast, Dr Scouler. Natka. 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) jMWce«?n, L, — E, Bat. L 814. 



Hab. Rocky Mountains. Drummond. Low plains of the Columbia. Douglas, 



2, T, (Agropyrum) repens, L, — E, Bot. t, 909. Torr, Fl, 1. 135. — a. vulgare /?. 



minus; spica breviore. — y, purpurascens ; spica parva, spiculis purpurascentibus, flosculiff 

 aristatis. — 5. snhvillosum; spica elongata, spiculis subvillosis. — e. nanum; spica breviore, 

 flosculis subsericeo-villosis. — Z,, dasystachyum ; elatuni, spicis majoribusj spiculis dense 

 sericeo-villosis, 



Hab. «. Saskatchawan to the Rocky Mountains and to the Mackenzie River. Dr Ricliardson, Drummond^ 

 Arid barren grounds at the junction of Lewis and Clarke's Rivers with the Columbia,— /S, Rocky Mountains. 

 Drummond — y. Bear Lake to the Arctic sea-coast. Dr Richardson.—'^. Fort Norman, on the Mackenzie- 

 River. Dr Richardson.— %, Arctic sea-coast. Dr Richardson. — I. Carlton House Fort, on the Saskatcha- 

 wan. t)r Richardson. — Allthe above I am quite disposed to consider as mere forms of one and tlie same species, 

 varying according to soil, locality, &c. The last var.> dasystachyum, very much resembles the T. dasyanthum^ 

 Spr. (Agropyrum, SchuUes Mant.p. 400.) but that from its obtuse florets and involute leaves, I would rather 

 refer to a hairy state of T. juiiceujn. 



3. T, (Agropyrum) caninum^ Schreb — JE. Bot. t. 1372, Torr. FL 1. p, 136. — /3. 

 Gmelini (Ledeb.) ; aristis validis demum patenti-reflexis. Ledeb. Ic, PL Boss, Altaic, 

 Illustr, L 248. — Bromus strigosus. Bieb, 



