Ammofhila.] GRAMINE^. - 481 



— Disteib. Shores of Europe, N. Africa ; species 4.— Etym. &fifios and 

 <pi\u}, sand lover. 



1. A. arundina'cea, Host. ; panicle subcylindric white, fl. glume 

 linear-oblong acute 3 times as long as the hairs. Psamma arenaria, R. 

 andS. 



Sand-hills by the sea, N. to Shetland ; Ireland ; Channel Islands ; fl. July. — 

 Rootstock widely creeping, binding the sand. Stems 2-4 ft., smooth or 

 scabrid above. Leaves long, rigid, convolute, polished without, scabrid and 

 glaucous within ; sheaths long ; ligule very long, 2-fid, torn. Panicle 3-6 

 in., straight, broadest and sometimes lobed at the base, yellowish ; branches 

 short. Spikelets erect, pedicels scabrid ; empty glumes §-§ in., acute, keel 

 scabrid ; fl. glume and palea quite like the empty glumes in colour and 

 texture. Anthers £ in., linear, yellow. — Distrib. Of the genus. 



2. A. baltica, Link ; panicle elongated interrupted, fl. glume lanceo- 

 late acuminate twice as long as the hairs. P. samma baltica, R. and S. 

 Eoss Links and Holy Isle, Northumbd. ; fl. Aug.-Sept. — Habit of A . arundina- 



cea, but distinguished by its laxer less cylindric panicles, more lanceolate and 

 acuminate glumes, and by the length of the hairs. The flowering glumes 

 are 5-nerved in both, but more faintly in A. bal'tica. — Disteib. Seashores 

 from Holland to Gothland. 



19. LAGU'RUS, L. Haee's-tail Geass. 



Annual. Spikelets in a dense villous ovoid head, 1-fld., laterally com- 

 pressed ; rachilla produced. Empty glumes 2, much exceeding the 

 flowering, equal, long, with slender feathery points. Fl. glume membra- 

 nous, shortly stipitate, with the pedicel of an upper flower at the back of 

 the palea, narrow, terete, with 2 short awns and an intermediate long bent 

 and twisted one. Palea 2-nerved. Scales 2, fleshy. Stamens 3. Ovary 

 glabrous ; styles very short, stigmas long feathery. Fruit smooth, 

 embraced by the glume and palea. — Disteib. W. and S. Europe, N. Africa, 

 W. Asia. — Etym. Xaydos and ovpd, hare's tail. 



L. ova'tus, L. ; leaves short flat, ligule short. 

 Sandy places, Guernsey ; naturalized near Saffron Walden ; fl. June. — Stems 

 6-10 in., very many, erect or decumbent below, stout, pubescent, leafy 

 below. Leaves broad, and inflated sheaths pubescent or villous. Heads 

 1-1| in., | in. broad, white, obtus-j. Empty glumes f in., very slender ; awn 

 twice as long as the nearly glabrous fl. glume. 



20. AI'RA, L. 



Spikelets laterally compressed, loosely panicled, 2-fld., rachilla not 

 produced. Empty glumes 2, equalling the flowering, membranous, sub- 

 equal, acute, 1-nerved. Fl. glumes pedicelled, membranous, subequal, 

 convex, 3-nerved, toothed, awned at the back. Palea 2-nerved, 2-fid. 

 Scales acuminate, entire or 2-fid. Stamens 3. Ovary glabrous ; stigmas 



I I 



