CL. III.] TRIANDRIA DIGTNIA. 93 



England : frequent. Eng. Bot. vol. xix. pi. 1317. Eng. Fl. vol. i. 

 p. 178. 209. 



43. HO'RDEUM. BARLEY. 



Common receptacle elongated, jointed, toothed alternately on 

 each side, the intermediate spaces flattened and bordered. Flowers 

 three at each tooth, not all perfect. Calyx to each flower of two 

 pointed or awned, parallel, erect chaff-scales. Corolla of two 

 husks; the outer egg-shaped, angular, terminated by a long, 

 straight, rough awn ; the inner smaller, lance-shaped, flat, pointed, 

 inflected at the edges. Nectary of two acute scales. Filaments 

 hair-like, short; anthers notched at both ends. Germen turbi- 

 nate. Styles very short ; stigmas feathery, reflected. Seed oblong, 

 pointed at both ends, channelled on the upper side, firmly united 

 to the husks. Name used by the Romans. 59. 



1. H. murinum. Wall Barley. Way Bennet. Lateral flowers with 

 stamens only ; chaff-scales of the intermediate flower lance-shaped, 



fringed. Root fibrous : stems from twelve to eighteen inches high, 



spreading at the base, then erect, smooth, leafy : leaves linear, flat, 

 roughish : two lateral flowers stalked : central flower perfect and large. 

 Annual : flowers in the summer months : grows by walls and road-sides : 

 common. Eng. Bot. vol. xxviii. pi. 1971. Eng. Fl. vol. i. p. 179. 210. 



2. H. pratense. Meadow Barley. Lateral flowers destitute of germen : 



all the chaff-scales bristle-shaped and rough. Root fibrous: stems 



about two feet high, smooth, and leafless at the top : leaves narrow, 

 roughish : lateral flowers stalked : central flower perfect and largest. 

 Perennial : flowers in the summer months : grows in meadows and pas- 

 tures : frequent in England, not found in Scotland. Eng. Bot. vol. vi. 

 pi. 409. Eng. Fl. vol. i. p. 180. 211. 



3. H. maritimum. Sea Barley. Squirrel-tail-grass. Lateral flowers 

 with stamens only, their awns shorter ; the inner scale of their calyx half 



egg-shaped. Resembles H. murinum, but is smaller and stifFer: the 



awns are stiff and strongly barbed, so as to be extremely troublesome to 

 horses when mixed with hay. Annual : flowers in the summer months : 

 grows in pastures and sandy ground near the sea : common in England ; 

 very rare in Scotland. Eng. Bot. vol. xvii. pi. 1205. Eng. Fl. vol. i. 

 p. 181. 212. 



44. TRITICTJM. WHEAT. 



Common receptacle elongated, toothed alternately on each side, 

 compressed, undulated. Spikelets solitary at each tooth, transverse 

 to the stalk, many-flowered. Calyx of two oblong, ribbed, nearly 

 equal, opposite chaff-scales, with or without terminal awns. 

 Flowers three or more in a spikelet, applied laterally to the recep- 

 tacle ; outer husk oblong, furrowed, pointed or awned ; inner flat, 

 awnless, inflected at each end. Nectary of two acute scales. Fila- 

 ments hair-like; anthers linear, forked at both ends. Germen 

 turbinate. Styles short, distinct ; stigmas feathery, reflected. Seed 

 oblong, blunt at both ends, convex on one side, channelled on the 

 other. Named from tritum, beaten or thrashed. 60. 



1 . T. jwi'ceum. Sea Wheat-grass. Rush Wheat. Chaff-scales ob- 

 I 



