24 AMMOPHILA ARVNDINACEA. 



the Orkney Islands, and is a native of Sweden, Lapland, Norway, 

 North America, United States, and in the Mediterranean Islands. 



Panicle dense, upright, lengthened-oval, short rough branches; panicle 

 three to five inches in length. Spikelets numerous, narrow, long, one 

 floret, which is shorter than the calyx. Calyx consisting of two un- 

 equal-sized acute glumes, devoid of lateral ribs. Floret of two palese, 

 the outer one five-ribbed, the dorsal rib toothed; base slightly hairy. 

 Palea equal in length. Stem upright, smooth, polished, circular, 

 carrying three or four leaves with somewhat rough sheaths, uppermost 

 sheath of about the same length as its leaf, having a lengthened lance- 

 shaped membranous ligule at its apex. Joints smooth. Leaves narrow, 

 smooth, pointed, glaucous, and rigid. Inflorescence panicled. Length 

 from eighteen to twenty-four inches. Root creeping and perennial. 



Flowers at the beginning of July. 



The illustration is from .a specimen procured at Lytham. 



