182 TRIANDRIA— DIGYNIA. Triticuni. 



Root annual, or perennial. Habit various. Stem simple or 

 branched. Spikes simple and close, or compound and lax. 



1. ^ , junceum. Sea Rushy Wheat-grass. 



Calyx-valves blunt, many-ribbed. Florets about live, awn- 

 less. Main stalk smooth. Leaves involute, sharp-pointed. 

 Root creeping. 



T. junceum. Lmn. Sp. PL 128. JV'dld. v. 1. 480, excl. most of the 



syn. Ft. Br. 157. Engl. Bot. v. 12. t. 814. Knapp t. 1 13. Hook. 



Scot. 44. Dicks. H. Sice. fasc. 6. 9. Schrad. Germ. v. 1. 394. 



Host Gram. v. 3. 23. t. 33. Fl. Dan. t.OlG. 

 Gramen maritimunij spica loliacea, foliis pungentibus, nostras. 



Pluk. Phyt. t. 33. f. 4. Dill, in Rail Syn. 39 1. 

 (3. G. loliaceum maritimum supinum, spica crassiore. Tourn. Inst. 



516. Dill, in RaiiSijn. 391. 

 y. G. caninum maritimum, spicfi foliacea. Bauh. Theair. 15. /. 



Raii Syn. 391. Moris, v. 3. 178. sect. 8. t.2.f. 12. 

 G. caninum marinum alterum. Ger. Em. 2b. f. 



On the sandy sea coast, frequent. 



Perennial. July. 



Root widely creeping, with numerous woolly fibres, well calculated 

 for binding the loose sand, which purpose it serves in common 

 with Elymus arenarius, Arundo arenaria, &c. The whole plant 

 is glaucous and rigid, like those grasses. Stem 1 2 or 18 inches 

 high, simple, inclining, leafy, round ; very smooth, even and 

 polished, tinged with a bright violet hue, below ; striated above. 

 Leaves strongly involute, many-ribbed ; smooth at the back j 

 marked with rough furrows on the upper side ; tapering and 

 pungent at the point. Sheaths furrowed. Stipida very short, 

 membranous. Spike simple, solitary, erect, rigid, of numerous, 

 alternate, rather distant, flat, ovate spikelets, each consisting of 

 5 or 6 smooth, awnless Jiorets. Calyx, and outer valve of the 

 corolla, many-ribbed, furrowed, keeled at the upper part, each 

 valve terminating in a slight notch, with a small, thick, inter- 

 mediate point, produced from the keel, most evident in the upper 

 Jiorets. The mairi stalk separates finally at the joints. The in- 

 ner valve of the corolla is minutely fringed. 



This species is sometimes confounded with a maritime variety of 

 T. repens, hereafter described. 



2. T. repens. Creeping Wheat-grass. Couch-grass. 



Calyx-valves pointed or awned, lanceolate, many-ribbed. 

 Florets about five, sharp-pointed or awned. Leaves flat. 

 Root creeping. 



T. repens. Linn. Sp. PL 128. fVilld. r. 1. 481. /'/. Br. 158. Engl. 



