94 TRIANDRIA TR1GYNIA. QcL. III. 



'use, 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 Eottbollia incurvata. Perennial: flowers in July: grows in sand on 

 the sea-coast, along with Arundo urenaria : common. Its long roots 

 tend to fix the sand, Eng. Bot. vol. xii. pi. 314. Eng. Fl. vol. i. 

 p. 182. 213. 



2. T. ripens. 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 somewhat 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: com- 

 mon. Eng. Bot. vol. xiii. pi. 909. Eng. Fl. vol. i. p. 183. 214. 



3. T. canin'um. 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 nume- 

 rous 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. cristutum. 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 a?o 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. lolidcenm. Dwarf Sea Wheat-grass. Chaff-scales obtuse, awn- 

 less ; flowers of each spikelet numerous, elliptical, ribbed, awnless ; 



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. An- 

 nual : 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. WATER-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-lobed. 

 Germen superior, turbinate, three-lobed. Styles very short ; stig- 



