16 TRIANDRIA DIGYN1A. [CI. 3. 



round below, with a swelling sheath. Spike ovate. Glumes 

 membranous, 

 Boggy heaths. If. 3. Leaves trian., sharp-pointed. Spike erect, 

 of a silvery -grey ; finally with long white hairs. 



2. E. capitation, 34. 2387. (Round-headed C.) Stem entirely round, 



with a swelling sheath. Spike roundish. Glumes membranous. 

 Rivulet on Ben Lawers. 2f . 8. Smaller, thicker and straighter. 



3. E. alpinum, 5. 311. (Alpine C.) Stem triangular, naked above 



the leaves. Spike oblong. ovate. Glumes firm, strongly keeled. 

 Bog near Forfar ; now extinct. If . 4, 5. L. very short. Spike minute. 



** Spikes several. 



I. &.polystdchion,8.563. (Broad-leaved C.) Stem round. Leaves 



flat, lanceolate, with a triangular point. Stalks of the spike 



smooth. Hairs thrice the length of the spikes. 



Boggy mead. If. 4. Leaves broad. Spikes ovate, at length drooping. 



- . E. pubescens, Suppl. 2633. (Downy-stalked C.) Stem angular 



upwards. Leaves flat, lanceolate, with a triangular point. 



Stalks of the spikes downy. Hairs twice the length of the spikes. 



Bogs. lf..4,5. Smaller. Leaves narrower. Glumes blackish. 



G. E. angustifolium, 8. 564. (Common C.) Stem nearly round. 



Leaves linear, triangular ; channelled towards the base. Stalks 



of the spikes smooth. Hairs four times the length of the spike. 



Boggy mead. If. 4. L. verynarr. Gl.grey, concealedby the hairs. 



7. E. gracile, 34. 2402. (Slender C.) Stem round, with three slight 



angles. Leaves triangular ; channelled towards the base. Spikes 



longer than the bractea. Hairs twice the length of the spike. 



Boggy mount., Scotl., rare. If. 7. Smaller, more slender, with 



jointed runners from the root. 



28. NiRDUS. Mat-grass. 

 1. N. stricta, 5. 290. (Common M.) Spike bristle-shaped, straight. 

 Leaves thrice the length of their sheaths. 

 Moist sandy moors. If. 7. Stems rigid, 4—5 in. L. bristle-sh. 

 spreading. 



TRIANDRIA DIGYNIA. 



29. PHiLARIS. Canary-grass. 



1. Ph. canadensis, 19. 1310. (Common C.) Panicle ovate, resem- 



bling a spike. Calyx-glumes boat-shaped ; entire at the summit. 

 Outer corolla of two naked valves. 

 Waste and cult. gr. naturalized. 0. 6—8. Glauc. 2 / Sp. 

 variegated with green and white. 



2. Ph. arundinacea, 6. 402. 30. 2160. f. 2. (Reed C.J Panicle 



upright, with spreading branches. Flowers crowded, unilateral. 

 Outer corolla of two bearded valves. 

 Pools and rivers. 2f , 7. About 4/ Panicle rough. 



