TRIANDRIA— DIGYNIA. Tiiodia. 131 



46. TRIODIA. Heath-grass. 



Br. Pi. 182. KunthNov. Gen. et Spec. v. 1. 150. t. 47, 48. Beauv. 

 Jgr.76. t. 15./.!). 



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

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

 spikelcf., about its own length, of several two-ranked per- 

 fect Jiorets^ 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 

 ari 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. 

 ^ect. of 2 scales. Filam. capillary. Antli. prominent, 

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

 Stigm. 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 hair}'. 



Festuca decumbens. Linn. Sp. PL 1 10. M^illd. v. 1 . 424. Huds. 47. 

 Fl. Dan. t. 162. Leers 34. t. 7.f. 5. Ehrh. Calam. 16. Dicks. 

 H.Sicc.fasc. 11.3. 



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



Poa decumbens. IVith. 147. Fl. Br. 107. Efigl. Bot. v.W. t. 792. 



Hook. Scot. '36. Knapp ^.59. Sclirad. Germ. v. 1. 305. Host 



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

 Melica decumbens. Ji^eb. Gott. 3. 

 Gramen avenaceum parvum procumbens, paniculis non aristatis. 



Raii Syn. 408. Pluk. Phijt. t. 34. /. 1. Mont. Prodr. 53. t. 2. 



f.\,S;t.p.:^3.f.77. 



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

 \77.sect.S. t.\.f.6. 



G. montanum avenaceum, locustis muticis tumentibus, pilosum. 

 Scheuchz. Agr. 170. t. 3.f. \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 incheslong, jointed, bent,lcafv,verv smooth. Leaves 



a 2 



