TRIANDRIA— DIGYNIA. Tiiticum. 181 



H. marinum. Huds.:)7. Dkks. 11. Sice. fuse. 5. 4. 



11. geniculatiim. Allion. Pedem. v. 2. 2jiJ. t. 01./. 3. 



II. rigiclum. Roth Catal. v. 1. 24, 



(iramen secalinum palustre et maritimum. Jlaii Sijn. 302. 



G. secalinum maiitimuin glaucifolium, spicis brevioribus. Moris. 

 V.3. \7[). sccf. S. t. 6./ 5. 



G. spicatum secalinum maritimum minus. Sdieuchz. Agr. 18. 



(t. hordeaceum a maritimis pumilum, Pluk. Phyt. ^.33./. 2, hud. 



In pastures and sandy ground near the sea. 



Annual. Jnne, July. 



This species most resembles H. murinum in general habit, but i^ on 

 the whole rather smaller and more glaucous. The aicns are all 

 rougher, with minute bristly teeth. This roughness, and the 

 great brittleness of the main stalk of the spike, cause consider- 

 able inconvenience to horses in whose hay this grass chances to 

 be intermixed. It sticks in small Iragments to their gums, and 

 produces inflammation. Luckily the plant is not of common 

 occurrence ; but in the isle of Thanet, where it abounds, the 

 effect just mentioned is notorious. Mr. Curtis records this cir- 

 cumstance in Fl. Loud. fasc. 5, under t. 9, referring it to the 

 common //. murinum, for he w^as not then practically acquainted 

 with the difference between these two grasses, nor does he advert 

 to it ; but he subsequently knew them well, and 1 have speci- 

 mens from himself. The half-ovate form of the innermost valve 

 of the calyx, clearly distinguishes H. maritimum, as Hudson well 

 remarked. The tvvo species^ though similar, are obviously and 

 sufficiently distinct. 



61. TRITICUM. Wheat. Vvlieat-grass. 



Linn. Oen.40. Juss. 32. Fl. Br. 137. Lam. f. 49. Gcertn. I. SI. 



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

 continuous, or somewhat jointed, toothed alternately at 

 each side, Avavy, compressed. Spikclets solitary at each 

 tooth, lateral, contrary to the main stalk, many-flowered. 

 Cal. of 2 concave, oblong, ribbed or keeled, nearly ecjual, 

 opposite valves, with or without terminal awns. Florets 

 3 or more, 2-ranked, applied laterally to the main stalk. 

 Outer valve of the corolla resembling the calyx, concave, 

 keeled or furrowed, pointed or awned ; inner flat, awn- 

 less, inflexed on each side at the lateral rib. Kectarij of 

 2 acute scales, tumid at die base. Filam, capillary. .//;///. 

 linear, forked at each end. Germc/i turbiniite*. Sti/les 

 short, distinct. Stigmas feathery. Seed ovate, obtuse, with 

 a narrow channel along the up]ier side, loose, but en- 

 veloped in the unchajiged corolla. 



