TRIANDRIA— DIGYXIA. Rottbollia. 175 



L. arvense. JVith. 1G8. Fl. Br. 151. Engl. Bot. v. 16. t. 1125. 



Knapp t. 102. Hook. Scot. 45. Sc/irad. Germ. v. 1.399. Host 



Gram. v. 3. 1/. ^ 25. 

 L. temulentum. Hiids. 55. 

 L. temulentum, a variety. Sincl. 301 . 

 L. verum Gesnevi. Moris, v. 3. 181. sect. 8. t. \.f. with a spike of 



the last, annexed. 



In fields, but not common. 



In Scotland. Mr. J. Mackay, and Mr. Hopkirk. Near V/altham- 

 stovv. Mr. E. Forster. 



Annual. Julij. 



Rather smaller and smoother than the preceding, of which it is 

 probably but a variety. The awns, represented too long in Engl. 

 Bot., are either wanting, or at most very short, lax and weak. 

 There are sometimes 2 little inner valves to the calijx ; some- 

 times none at all. Schrader observes that the upper part of the 

 stem, and the common stalk of the spike, are not invariably 

 smooth. 



58. ROTTBOLLIA. Hard-grass. 



Linn.Suppl.\3. Schreb. Gen.72\. Juss.3]. Fl. Br. ]5l. Lam. 

 t.48. 



Common receptacle, or main stalk, many-flowered, elongated, 

 jointed, finally separable, with a channel in each joint, al- 

 ternately disposed, to receive the Jlo?'eis, which are mostly 

 2 in each channel, of a different structure from each other, 

 1 only being always perfect. Cal. of 2 parallel valves, 

 opposite to die channel, lanceolate, spreading whilst in 

 blossom. Cor., in the perfect floret, of 2 lanceolate, acute, 

 membranous, nearly equal, valves, inflexed at the edges ; 

 in the other similar, if furnished with stame7is ,- if not, 

 merely a rudiment, or scale. Nect. of 2 acute scales. 

 Filam. capillary. Anth. pendulous, cloven at each end. 

 Germen oblong, obtuse, in 1 floret only. Styles short. 

 Stigmas widely spreading, feathery. Seed elliptic-oblong, 

 shut up in the cavity of each joint of the stalk, by the 

 closed glumes, and falling off with it. 



Habit and size very various. Spikes either solitary, or ag- 

 gregate, brittle when the seed js ri])e. 



1. R. incurvata. Sea Hard-grass. 



Spike cylindrical, tapering. Cal3rx-valves combined below. 



Floret solitary. Corolla awnless. 

 R. incurvata. Linn. Suppl. 114. Willd. v. 1.463. Fl. Br. 151. 



