TRIANDPJA— DIGYNIA. Triodia. 131 



angustifolia of Linnaeus, which belongs to pratensis. Neither is 

 it trivlalis of Leers, whose considerable web indicates an affinity 

 to pratensis also. Morison's sect.S. t.5.f. 19, is, more safely 

 perhaps, transferred from the present plant to that species. 

 In Switzerland P. nemoralis often bears, on the stems, rigid bristly 

 tufts like radicles, analogous to the mossy balls of the Dog-Rose, 

 and like them probably the effect of the puncture of some insect. 

 See Bocc. Mus. t.59. Scheuchz. It. 1.38. t.o.f.l. This has 

 not been noticed in Britain. Schrader makes it his var. /3 ; but 

 it is rather an accident than a variety. 



46. TRIODIA. Heath-grass. 



Br. Pr. 182. Kunth Nov. Gen. et Spec. v. 1. 155. £.47,48. Beauv. 

 Agr.76. t.)5.f.9. 



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

 cave, keeled, valves, containing an ovate, imbricated, tu- 

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

 perfect Jlorets, variously hairy at the base, but without 

 any complicated web. Cor. of 2 unequal, ovate, rigid, 

 concave 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. Filam. capillary. Antlu prominent, 

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

 Stig?n. 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, 



I. T. decumbens. Decumbent Heath-grass. 



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

 middle tooth shortest. Calyx smooth. Stipula hairy. 



Festuca decumbens. Linn. Sp. PL 1 10. mild. v. 1.424. Huds.47. 



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



H. Sicc.fasc. 11.3. 

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

 Poa decumbens. With.U7. Fl.Br.107. Engl.Bot.v.W. t.792. 



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



Gram, u.2.52. t. 72. 

 Melica decumbens. Web. Gott. 3. 



k 2 



