176 87. CYPERACE^:. 



2. E. MULTICAULIS, Sm. Many '-stalked Spike-rush. Smaller 

 than the last, and densely tufted, some of the sterns barren, 

 resembling leaves. Spikelets smaller. Nut triquetrous, crowned 

 with the triquetrous base of the style. Bristles usually 6. 



Frequent. In marshes. (B) P. 7. Near Largs ; Cumbrae, Bute, and Arran. 



3. E. ACICULARIS, Br. Least Spike-rush. Very small and 

 slender, 2 3 in. high. Stems setaceous. Spikes very small, 

 ovate, acute. Nut obovate-oblong, compressed, ribbed and striate, 

 crowned by the almost globose base of the style. Bristles 3 4. 



Not common. Sides of lakes in moorish and damp sandy places. (E) P. 7 8. 

 "Plentifully about Bardowie loch," Hopk. Brother loch, Mearns; Island of 

 Arran. 



5. IstfLEPls. Mud-rush. 



1. I. FLUITANS, E. Br. Floating Isolepis. Stems compressed, 

 either floating in pools or forming matted masses 011 the margin, 

 branched and jointed. Le. linear, sheathing at the base. Spikelet 

 terminal, oval, with few fl. Bract with no leafy point. Gl. 

 obtuse, keeled. Stigmas 2. Nut compressed obovate. 



Not common. Pools of water and still lakes. (B) P. 6 7. "In Frankfield 

 and Bardowie lochs," Hopk. Gourock, Cumbrae, Bute, and Arran. 



2. I. SETACEA, R. Br. Bristle-stalked Mud-rush. Stems slender, 

 2 3 in. high, densely tufted. Le. short, setaceous. Spikelets 

 2 3, apparently lateral, from the leaf -like bract forming a con- 

 tinuation of the stem, 3 4 times longer than the spikes. Gl. 

 dark brown, with a green midrib. Nut ribbed and furrowed. 



Frequent. On the edges of muddy pools and gravelly places. (B) P. 78. 

 Possil marsh; banks of Clyde from Gourock to Arran. 



3. I. SAVII, Schultes. Savi's Mud-rush. Very like the pre- 

 ceding but still more slender, 4 6 in. high, glaucous, outer bract 

 seldom exceeding in length the 2 3 small spikelets. Nut with 

 very minute rough points. 



Rare. Wet bogs in the island of Arran. (A) P. 7. 



Var. monostachys, with one small spikelet, longer than the 

 bract. Island of Arran. 



6. SctfRPUS. Club-rusk, Bulrush. 



A. Stem round. Spikelets lateral. 



1. S. LACUSTRIS, L. Lake Club-rush, Bulrush. Stems erect, 

 2 8 ft. high, thick below, gradually tapering upwards. Spikelets 

 numerous, in a compound panicle. Bract appearing as a con- 

 tinuation of the stem. Gl. smooth, notched at the top, fringed at 

 the base. Anthers bearded at the end. Nut obovate, bluntly 

 trigonous. Style trifid. 



Frequent. In lakes and ivers. (B) P. 78. Possil marsh ; river Kelvin at 

 Bamulie bridge. 



