88 TRIANDRIA— DIGYNIA. Agrostis. 



Panicum serotinum arvense, spica pyramidata. Tourn. Inst. 5]5. 

 Rail Syn. 394. 



Gramen paniceum serotinum, spica laxa pyramidali. Moris, v. 3. 

 189. Herh.Bobart. 



G. serotinum arvense, panicuU contract^, pyramidali. Scheuchx. 

 Agr. 148. 



G. alopecuro accedens, ex culmi geniculis spicas cumpetiolis longi- 

 usculis promens. Pluk.Almag. 177. Phijt. t.33.f. 6. 



In fields where water has stagnated, especially towards the sea, but 

 not common. 



In the isle of Shepey plentifully. Huds. At Weymouth. Rev. Mr. 

 Lightfoot. In corn fields at Gillinghani, Norfolk. Mr. Woodward. 

 At C'ley, Norfolk. Mr. Rose. 



Annual. August. 



Stem branched from the bottom, smooth. Leaves roughish at the 

 edges, with smooth, striated, slightly tumid, sheaths. Stipula ob- 

 long, torn when old. Panicle erect, lobed, but very close, taper- 

 ing, pale green, bristly, with roughish and angular partial stalks. 

 Fl. small, pale green. Cat. tumid and polished at the base ; its 

 valves compressed, membranous at the edges, rough at the 

 keel; one of them longest, and most pointed, but not awned. 

 Cor. much smaller; its outer valve ovate, concave, obtuse, 

 downy, with a jointed, rough, twisting, dorsal awn, rather longer 

 than the calyx, rarely if ever wanting ; inner smaller, cloven, 

 hairy at the base. Nect. deeply cloven, acute. Anth. short. 

 Seed coated with the hardened corolla, and enveloped in the 

 shining calyx. 



35. AGROSTIS. Bent-grass. 



Limi. Gen. 33. Juss. 39. Fl. Br. 77. Lam. t.4l. 



Cal. of 2 rather unequal, acute, keeled, folded, clasping, 

 awnless, permanent valves, containing a single floret. 

 Co?', of 2 unequal valves, generally larger than the calyx, 

 membranous, ribbed, unchanged after flowering, with a 

 tuft or tvs^o of hairs at the base ; the larger valve bearing, 

 constantly in some species, a rough, dorsal awn, which in 

 others is most generally wanting ; the smaller valve con- 

 stantly awnless, more membranous, various in size, and 

 occasionally abortive. Nect. of 2 minute scales, some- 

 times combined. Filam. capillary, rather longer than the 

 glumes. Anth. deeply divided at each end. Germ, ovate. 

 Styles short. Stigm. densely feathery. Seed ovate, po- 

 lished, loose, wrapped in the unaltered corolla. 



Habit various, generally slender, with fibrous, mostly per- 

 ennial, roots, and jointed, leafy, erect, ascending, or pro- 



