92 AGROSTIS. [ctASS HI. ORDER 11. 



seen, and occasionally absent, all wliicli varieties may sometimes be 

 seen in the same plant. Anthers yellow. Seed minute. Stigmas 

 feathery. 



Habitat. — Heaths, moors, and waste places frequent. 



Perennial ; flowering in June and July. 



This is an extremely sportive species, and from the absence of one 

 of the valves of the glumella, (which from the above authorities, to 

 which we may add that of Greville, in Flora Edinensis,p. 10) it appears 

 by no means a constant character ; and upon the value of this 

 character, Smith has remarked, that " such a partial deficiency could 

 hardly afford a specific, much less a generic, distinction." From this 

 circumstance, however, Schrader has constructed his genus Trichmlium, 

 and it is adopted by Lindley. This grass abounds in hilly and poor 

 pastures ; the leaves are more or less setaceous, depending upon 

 the situation of their growth being dry or otherwise : in dry situations 

 the root leaves are remarkably so, but become thick and fleshy at 

 the base ; by this provision there is formed, as it were, a reservoir 

 of nutriment, and the plants are enabled to sustain themselves 

 during long continued droughts, which often prevail in elevated 

 situations. It is of no agricultural utility, afi'ording but little nutri- 

 ment, and one which the farmer may consider as a weed, and an 

 indication that his land is greatly capable of improvement by suitable 

 tillage. 



2. ^. «eto'cea, Curtis, (Fig. 116.) bristle-leaved Bent-grass. Panicle 



erect, its branches short and close ; glumes lanceolate, slightly 



unequal, keel rough ; glumelles unequal, outer valve with a long 



jointed and twisted awu from near the base, inner minute; radical 



leiives setaceous. 



English Botany, t. 1168. — English Flora, vol. i. p. 91. — Hooker, 



British Flora, vol. i. p. 37. — Tricho'dium seta'cev.m, Rwm. and Sch. 



— Lindley, Synopsis, p. 303. 



Root with strong downy fibres. Stems from six to twelve inches 

 high, nearly erect, slender, smooth or slightly rough, mostly bearing 

 two short leaves. Leaves, a pale glaucous green, roughish or downy ; 

 the radical ones are erect, almost round, bristle shaped, (setaceous) 

 from the rolling in of the edges, those of the stem broader, much 

 shorter and having long smoa[\i s/icuths. I/njula thin lanceolate, mostly 

 torn. Injlorescence an erect, short Inanched panicle, close, except 

 when in flower it is spreading. Glumes lanceolate, pale purplish 

 tapering at the extremity, rough on the keel and edges, and slightly 

 downy all over, outer valve somewhat longer than the inner. Glumelles 

 very unequal, white thin and membranous, the outer one lanceolate 

 obtuse, having four green nerves, the two lateral ones of v\hich ter- 

 minate in projecting points, the rough jointed and twisted aicn arises 

 from the base of the valve, and is about twice as long ; the inrun- valve 



