TRIANDRIA— DIGYNIA. Alopecurus. 83 



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 calyx. 



A. geniculatus. Linn. Sp. PL 89. Willd. v. I. 358, excluding the 

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

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

 Schrad. Germ. v.\.\ 73. Leers 1 6. t. 2./.T. Ehrh. Calam. 42. 

 Sincl. 245. 



A. paniceus. Ft. Dan. t. 86 1. 



A. n. 1541. Hall. Hist. v. 2. 249. 



Gramen aquaticum geniculatum spicatum. Bauh. Theair. 42. f. 

 Scheuchz. Agr. 72. t. 6.f. C, D, E. Raii Syn. 396. 



G. fluviatile spicatum. Ger. Em. 14./. 



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



G. alopecurum fluviatile geniculatum procumbens. Moris, v. 3. 193. 

 sect. 8. t.A.f. 15. 



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



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



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 steins. Leaves much broader and shorter 

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

 tumid sheaths. Stipula oblong, very thin. Spikes erect, \\ or 

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

 lobes, or tufts, with smooth flower-stalks. Calyx-glumes nearly 

 equal, obtuse, purplish, combined at the base, minutely pointed, 

 but terminating in a membrane which conceals the dark-co- 

 loured point ; their sides hairy, and keels strongly fringed. Cor. 

 shorter than the calyx, abrupt, irregularly notched, ribbed 

 slightly at each side. Awn from below the middle, twice the 

 length of the calyx. Anth. linear, yellow. Styles short ; accord- 

 ing to Schrader combined at first, but subsequently distinct. 

 Stigmas long, cylindrical, acute, downy. 



The root in var. y has extremely copious and long fibres, and one 

 or two of the lower joints of the stem, owing to a dry barren 

 situation, become oval and fleshy, as in Phleum pratense y, 

 p. 75. This has by many been mistaken for A. bulbosus, which 

 always grows in water, and differs essentially in character, as 

 I trust can no longer be doubted. 



6. A.fulvus. Orange- spiked Fox- tail -grass. 



Stem ascending, bent at the joints. Spike cylindrical, pa- 



G 2 



