TRIANDEIA MONOGYNIA. 15 



edges, the two outer the largest, but shorter than the spike. 

 Chocolate-headed Club-rush. 



Hal. In a bog in the field adjoining Spring Gardens. Aug. 



v 



3. S. fluitans, stem branched, leafy, pliant and floating ; flower- 

 stalks alternate, naked ; spikes of few flowers, with obtuse green- 

 ish glumes ; stigmas 2. Floating Club-rush. 



Hob. Pools and ditches. " Moor west of Belford plentiful," 

 Thomp. July. ?/ 



* * Stem round, with several spikes. 



4. S. lacustris, stem 4 to 6 feet high, naked ; pannicle cymose, 

 twice compound, terminal ; spikes ovate ; bracteas generally 

 much shorter than the panicle. Bull-rush. 



Hob. Sides of rivers and ponds. Whiteadder, particularly 

 near its junction with the Tweed, Thomp. July. If. 



The stems are much used for making mats, chair-bottoms, 

 and for thatching. 



5. S. setaceus, stems tufted, 3 inches high, bristle-shaped, leafv 

 at the base ; spikes about 2, sessile, surmounted by a leafy brae- 

 tea ; seed furrowed, without bristles. Bristle-stalked Club-rush. 



Hob. Wet gravelly places, frequent on moors. Bog below 

 Shoreswood-hall. Haidendean, Dr Thompson. Lamber- 

 ton Moor, &c. July, August. 



ti. S. caricimis, stem roundish, leafy at the bottom ; spikes ag- 

 gregate, two -ranked, many-flowered; leaves flat, with rough 

 edges and keel ; seed with six bristles at the base. Compressed 

 Club-rush. 



Hob. Boggy meadows. " Links near Bamburgh," Winch. 

 Near the style below Gallowshill, Thomp. Above the 

 Coves in Holy Island. July. If. 



Hoot creeping. Stems from 4 inches to upwards of a foot in 

 height, simple, smooth, rounded until within an inch or 

 two of the spikes, when it becomes suddenly triangular. 

 Leaves grass-green, shorter than the stem, sheathing, 

 channelled, the upper frequently plane, smooth and un- 

 keeled on their lower part, becoming keeled and triangu- 

 lar upwards ; the keel and edges rough. Lower bracteas 

 foliaceous, shorter or longer than the spikes, which are 

 2-ranked, of a brown colour. The seed is triangular, with 

 a long slender beak, and several long hairs at the base. 



