Gramineae. 165 



y..—PHALARIS. 



PHAL'ARIS ARUNDINA'CEA (109). Reed Canary-grass. 7—8. 



(1638) Stem 2 — 3ft., leaves^ — -^in. broad long flat, panicle erect 4 — Sin. with 

 spreading branches with the spikelets crowded at their ends, spikelets 

 I -flowered with 2 empty glumes enclosing the floret and exceeding it, 

 outer palea broad awnless, inner palea much smaller, glumes not 

 winged on the keel. Sides of lakes and rivers. 



A variety with leaves striped with white lines is cultivated in gardens 

 under the name of Ribbon-grass. 



Phalaris canariensis or Canary-grass (naturalised and common in waste 

 places) has an ovate roundish spike-like panicle with pale yellowish-green 

 glumes winged on the keel. 



YA.—TRITICUM. 



Inflorescence a spike, spikelets many-flowered solitary sessile in notches- 

 of the rachis and parallel to it, empty glumes 2 unequal shorter than the 

 flowering glumes, inner palea with ciliate nerves, outer palea rigid many- 

 nerved often awned. 



Root fibrous, T. caninum. 



Root creeping, 643 



643 Outer palea acuminate awned, ... T. repens. 



643 Outer palea obtuse awnless, .... T. junceum. 



TRIT'ICUM CANI'NUM (82). Fibrous-rooted Wheat-grass. 6—7. 



(1749) Stem I — 3 ft. slender, root fibrous, spike 2 — 10 in. very slender, 

 spikelets slender, empty glumes lanceolate 3 — 5-ribbed shortly awned, 

 outer palea linear-lanceolate 5-nerved awned. 



TRIT'ICUM RE'PENS (108). Couch Grass. 6—7. Root creeping, 



(1750) stem I — 4 ft. ascending bent, spike 2 — 10 in. rigid, spikelets f — i in. 

 rigid, empty glumes 5-ribbed awned or not, outer palea acuminate or 

 erect with a short awn. Fields, Fig. p. 162. 



TRIT'ICUM JUN'CEUM {36). Rushy Wheat-grass. 7—8. Stem 

 (1753) 2 — 3 ft. ascending smooth, spike fragile 2 — 4 in. stout curved, spike- 

 lets stout distant, glumes blunt 5 — 11 -ribbed awnless, outer palea blunt 

 or slightly mucronate. Seashores. 



Tritiaim vulgare is the cultivated wheat. 



yUl.—BRACHYPODIUM. 



Inflorescence a spike, spikelets solitary very many flowered, empty glumes 

 2 unequal much shorter than the lowest floret, inner palea strongly ciliate on 

 the nerves, outer palea awned. 



Root fibrous, awn longer than the outer palea, . . B. sylvaticum. 

 Root creeping, awn shorter than the outer palea, . B. pinnatum. 



