82 TRIANDRIA— DIGYNIA. Alopecurus. 



span high. Leaves narrow, striated, slightly channelled or con- 

 cave ; those on the stem with long swelling sheaths. Stipula 

 lanceolate, short. Spike racemose, but hardly branched, the 

 partial stalks very short. Calyx-glumes broader, and less linear, 

 than they appear in Engl. Bot., being somewhat dilated upward, 

 and bordered at the keel ; they are minutely downy, or hoary 

 all over, with purplish ribs and point, the keel and ribs fringed. 

 Corolla bluntish, one third shorter than the calyx ; its awn 

 twice as long. Anthers scarcely protruding beyond the glumes. 

 Styles combined, short. Stigmas linear, downy, extending a little 

 beyond the calyx. The calyx-glumes are certainly not combined 

 in this spegies, which obliges me, with regret, to reject that part 

 of Schreber's and Schrader's generic character. Foreign bota- 

 nists seem unacquainted with this gi'ass, nor have all those of 

 our own country known it well. None can be more invariably 

 distinct. 



5. A. geniculatus. Floating Fox-tail-grass. 



Stem ascending, bent at the joints. Spike cylindrical, 

 slightly panicled. Calyx-glumes combined at the base, 

 abrupt, fringed. Corolla notched, its awn twice the 

 length of the cal}TC. 



A. geniculatus. hmn. Sp. PI. 89. Willd. v. 1. 358, excluding the 



reference to Fl. Dan. ! Fl. Br. 74. Engl. Bot. v. 18. 1. 1250. 



Curt. Land, fasc.5. t.6. Mart. Rust. t.97. Hook. Scot. 22. 



Schrad. Germ. v. 1. 173. Leers l(j. t. 2./. 7. Ehrh. Calam. 42, 



Sincl. 245. 

 A. paniceus. Fl. Dan. t. 861 . 

 A. n. 1541. Hall. Hist. t;.2. 249. 

 Gramen aquaticum geniculatum spicatura. Bauh. Theatr. 42. /. 



Scheuchz.Jgr. 72. t. 6./. C, D, E. Raii Syn. 396. 

 G. fluviatile spicatum. Ger. Em. 14. f. 

 " G. aquaticum spicatum. Park. Theatr. 1275. f." 

 G. alopecurum fluviatile geniculatum procumbens. Moris. v.Z. 193. 



sect.^. t.4.f.\5. 



j3. G. fluviatile album. Dill, in Raii Syn. 396. 



y. Alopecurus bulbosus. Huds. 27, excluding the synonjmis. 



A. bulbosus geniculatus. Sincl. 185. 



In ponds, ditches, and slow streams, floating widely on the surface. 



y. In dry barren ground, or on walls. 



Perennial. July. 



Roots of many long fibres, from the lower joints of the branched, 

 spreading, leafy, smooth stems. Leaves much broader and shorter 

 than in the last, with roughish furrows, and long, smooth, rather 

 tumid sheaths. Stipula oblong, very thin. Spikes erect, 1^ or 

 2 inches long, bluntish, dense, but separable into short, branched 



