94 TRIANDRIA TBIGYNTA. ' [CL. Ill- 



1. T.jun'eeum. Sea Wheat-grass. Rush Wheat. Chaff-scales ob- 

 tuse, many-ribbed : flowers of each, spikelet about five, awnless ; 



leaves involute with a thorny point. Root creeping : straw about 



a foot and a half high, simple, ascending, round, leafy, smooth below, 

 striated above : leaves stiff, furrowed on the upper side, smooth on 

 the back : spike from four to six inches long : spikelets rather 

 distant, egg-shaped, of five or six awnless flowers : the receptacle 

 separates at the joint as in Rottbottia incurvata. Perennial : flowers 

 in July : grows in sand on the sea-coast, along with Arundo are- 

 naria : common. Its long roots tend to fix the sand. Eng. Bot. 

 vol. xii. pi. 314. Eng. Fl vol. i. p. 182. 213. 



2. T. re'pens. Creeping Wheat-grass. Couch-grass. Chaff-scales 

 pointed or awned, lance-shaped, many-ribbed ; flowers of each 

 spikelet about five, sharp-pointed or awned ; leaves flat ; root 



creeping. Root long, creeping: straws about two feet high, 



erect, leafy : leaves linear, flat, spreading, their margins and upper 

 surface rough : spike about three inches long, erect, its stalk some- 

 what hairy : a variety, of a pale bluish-green or glaucous colour, 

 occurs in maritime places. Perennial : flowers in June and July : 

 grows in fields, by hedges and in waste places: common. Eng. Bot. 

 vol. xiii. pi. 909. Eng. FL vol. i. p. 183. 214. 



3. T. caninum. Fibrous-rooted Wheat-grass. Dog's Wheat. Chaff- 

 scales somewhat awned, lance-shaped, with three or five ribs ; 



flowers of each spikelet four, awned ; leaves flat ; root fibrous. 



Root of numerous downy fibres : straws about two feet high, erect, 

 leafy : leaves linear, flat, [nearly erect, rough on both sides : spike 

 three or four inches long, a little inclining. Perennial : flowers in 

 June and July: grows in woods and hedges: common. Eng. Bot. 

 vol. xx. pi. 1372. Eng. Fl. vol. i. p. 184. 215. 



4. T. cristdtum. Crested Wheat-grass. Chaff-scales elliptical, 

 awned, keeled, indistinctly ribbed, flowers awned ; spikelets of about 



four crowded flowers ; straws simple. Root of long woolly fibres : 



straws about eighteen inches high, stiff, slender, leafy : leaves linear, 

 keeled, long-pointed, very hairy on the upper surface : spike an 

 inch or more in length. Perennial : flowers in July : found many 

 years ago on the coast between Arbroath and Montrose, by Mr. G. 

 Don. Eng. Bot. vol. xxxii. pi. 2267. Eng. Fl. vol. i. p. 185. 216. 



5. T. lolidceum. Dwarf Sea Wheat-grass. Chaff-scales obtuse, 

 awnless ; flowers of each spikelet numerous, elliptical, ribbed, awn- 

 less ; spikelets all directed one way ; straw branched ; root fibrous . 



Root of long downy fibres : straw stiff and wiry, three or four 



inches high, very smooth , reddish -brown : leaves linear, acute, nearly 

 smooth. Annual : grows in sandy pastures on the sea-coast : not 

 common. Eng. Bot. vol.iv. pi. 221. Eng. FL vol. i. p. 185. 217. 



TRIGYNIA. 



45. MO'NTIA. WATEE-CHICKWEED. 



Calyx inferior, of two egg-shaped, concave, erect, permanent 

 leaves. Corolla of one petal, divided into five segments ; three 

 smaller, bearing the stamens. Filaments hair-like, as long as 

 the corolla, to which they are attached ; anthers small, two- 



