TRIANDRIA— DIGYNIA. Triodia. 131 



46. TRIODIA. Heath-grass. 



Br. Pr. 182. Kunth Nov. Gen. et Spec. v. 1. 155. t. 47, 48. Beaiw. 

 Agr.76.t. 15./. 9. 



Cal. of 2 nearly equal, clasping, awnless, acute, ovate, con- 

 cave, keeled, valves, containing an ovate, imbricated, tumid 

 spikelet, about its own length, of several two-ranked per- 

 fect Jlorets, variously hairy at the base, but without any 

 complicated web. Cor. of 2 unequal, ovate, rigid, con- 

 cave valves, closely pressed together transversely ; the 

 outer obscurely many-ribbed, not keeled ; flat and ex- 

 panded at the edges ; deeply cloven at the summit, with 

 an intermediate dorsal tooth, or awn, longer or shorter 

 than the lateral points ; inner smaller, lining the cavity 

 of the outer, fringed ; cloven or notched at the point. 

 Nect. of 2 scales. Filavi. capillary. Antli. prominent, 

 pendulous. Germen oval, flat. Styles short, distinct. 

 Siigm. cylindrical, feathery. Seed loose, oval, depressed, 

 convex on the outside, concave on the inner, closely 

 pressed between the unchanged valves of the corolla. 



Hard, rigid, perennial grasses, with leafy stems. Inflores- 

 cence- variously panicled. 



1. T. decumbens. Decumbent Heath-grass. 



Panicle nearly simple, close, erect. Florets four; their 

 middle tooth shortest. Calyx smooth. Stipula hairy. 



Festuca decumbens. Lmn. Sp. PL 1 10. fVilld. v. 1. 424. Huds. 47. 

 Fl. Dan. t. 162. Leers 34. t. 7. J. 5. m,rh. Calam. 16. Dicks. 

 H.Sicc.fasc. 11.3. 



F. n. 1434. Hall. Hist. v. 2. 213. 



Poa decumbens. IVith. 147. Fl. Br. 107. E)2gl. Bot. v.U.t. 792. 



Hook. Scot. 36. Knapp t. 59. Schrad. Germ. v. 1. 305. Host 



Gram. v. 2. 52. t. 72. . 

 Melica decumbens. Web. Gott. 3. 

 Gramen avenaceum parvum procumbens, paniculis non aristatis. 



Rati Syn. 408. Pluk. Phyt. t. 34. /. 1. Mont. Prodr. 53. t. 2. 



f.\,8,t.p.53.f.77. 



G. triticeum palustre humilius, spica mutica breviore. Moris, v. 3. 

 \77. sect. 8. t.\.f.6. 



G. montanum avenaceum, locustis muticis turaentibuSj pilosum. 

 Scheuchz. Agr. 170. t. 3./. 1 6. A, B, C. 



In spongy bogs, on barren, sandy, mountainous ground, frequent. 



Perennial. July. 



Root slightly creeping, with strong fibres. Whole plant harsh and 

 rigid, lying close to the ground except when in flower. Stem 

 from 4 to 12 inches long, jointed, bent, leafv, very smooth. Leaves 



K 2 



