Tritiatm.] THIANDRIA — DIGYNIA. 51 



Woods and thickets, especially in a chalky soil : apparently not rare 

 in the midland and northern parts of England, but unknown to Scotland. 

 F/. June, If-. — It would appear to me much more natural to unite this 

 with Hordeum, as Hudson has done. My specimens have the calyx 

 mostly one-flowered, and I do not see how it differs from those Hordea 

 which have their lateral flower fertile. In habit too it quite accords, 

 as well as in the long a»wns and subulate cal. -valves. 



44. Hordeum. Linn. Barley. 



1. H. murinum, L. (^icull Barley); cal.-valves of the inter- 

 mediate floret linear-lanceolate ciliated, those of tlie lateral flo- 

 rets setaceous scabrous. E. Bot. t. 1971. 



Waste ground, by walls and roud-sides : common in England, rare in 

 Scotland. About Edinburgh ; and at Elgin, Rev. G. Gordon, which 

 is its most northerly range. Fl. June, July. ©. 



2. H. pratense, Huds. {meadow Barley); all the cal.-valves 

 setaceous and scabrous. E. Bot. t. 409. 



Moist meadows and pastures in England, frequent : rare in Scotland ; 

 Mr Neill finds it about Salisbury Craigs. Fl. July. 0. 



3. H. marit'unum. With, (sea- side Barley); cal.-valves smootli- 

 ish, the interior one of the lateral florets semi-lanceolate, the 

 rest setaceous. E. Bot. t. 1205. 



Light dry pastures and sandy ground near the sea, not rare in England. 

 In Scotland it has only been found in Angus-shire. Fl. July. 0. — All 

 our British species of this genus are admirably characterized by the form, 

 &c. of their cal.-valves. The present is the smallest species, procumbent 

 at the base and glaucous. 



45. Triticum. Linn. Wheat or Wheat-grass. 

 * Spihelets distichous. 

 1. T.cn7iinum, Huds. {fibrous-rooted Wheat-grass); cal.-valves 

 awned with 3 — 5 ribs and about 5 awned florets, leaves plane, 

 root fibrous. E. Bot. t. 1327. — Elymtis, L. 



Woods and banks, frequent, i^/. July. If. — Best distinguished from 

 the following by its fibrous root. 



2. T. repensy L. {creeping Wheat-grass or Couch-grass); cal.- 

 valves many-ribbed with from 4 — 8 awned (rarely avvnless) flo- 

 rets, leaves plane, root creeping. E. Bot. t. 909. 



Fields and waste places, every where. Fl. throughout the summer 

 months. If. — In habit between the preceding and following, having a 

 glaucous tint when growing near the sea. Leaves plane or nearly so. 

 Spikelets smaller and less compressed than in T. juiiceum. Cal. and 

 ext. valves of the cor. with from 5 — 9 nerves, acute or terminated by an 

 awn of greater or less length. — This pest of the corn-fields is difficult to 

 be extirpated on account of its long creeping roots. 



3. T. Junceum, L. (rushy sea Wheat-grass); valves of the 

 cal. obtuse mucii ribbed with 4 — 5 awnless florets, leaves invo- 

 lute pungent, root creeping. E. Bot. t. 814, 



Sandy sea-shores, frequent. Fl. July. If. — Whole plant glaucous, 

 rigid, 1^ — 3 f. high. Spike loit'^. iS/>/At/c^s oblong, much compressed, 



