138 
P. toncrroitus. Long-leaved Pond-weed. Fig. 1371, 
Leaves elongate-lanceolate, narrowing below. Stipules winged. Pe- 
duncle very long, thickened upwards. Lakes. Perenn. Aug. Brown. 
(2) E.B. Supp. 2847. H.& Arn. 352. Bab. 482. 
Genus 2, Ruprta. 
R. MARITIMA. ' Fig. 1372. 
Leaves submersed, long, linear; sheaths inflated. Salt ditches, 
Flower-stalks long, often spiral. Perenn. June and July. Green. 
(2) #£.B. 1. 136, & B. 2. 248. H. & Arn. 485. Bab. 355. 
Lind. 251. 
Genus 3. ZANNICHELLIA. 
Z. pALustRis. Horned Pond-weed. Fig, 1373. 
Leaves grass-like. Flowers axillary, moncecious. Ditches. Ann. 
Aug. Greenish. ($) 2. B. 1.1844. #, B. 2.1240. H. & Arn. 
486. Bab. 355. Lind.».251. 
Genus 4. ZosTERA. 
Z. MARINA. Grass-wrack. Fig. 1374. 
Plant submersed. Leaves grass-like. Shallow bays and salt ditches. 
Perenn. Aug. (3) #.B. 1.467. #.B. 2.4. H. & Arn. 487. Bab: 
396. Lind. 251, 
Orprer CV. CYPERACEA. 
Genus 1. Cypprus. . 
C. toneus. Sweet Cyperus. Fig, 1375. 
Stem triangular. Umbel leafy, twice compound. Bogs; rare. 
2-3 ft. Perenn. July and Aug. Brown. (4) AF. B. 1. 1309. 
HE. B. 2.55. H.& Arn. 489. Bab, 357. Lind. 279. 
C. ruscus. Brown Cyperus. Fig. 1376. 
Stem triangular. Umbel compound. Involucrum of three leaves. 
Bogs; rare. 4-6in. Ann. July. (%) #.B. Supp. 2626. FE. B.2. 
55*. H. & Arn. 489. Bab. 357. Lind. 279. 
Genus 2. ScH@nus. 
S. nigricans. Black Bog-rush. Fig. 1377, 
Stem round, naked. Flowers in roundish heads between two leaves. 
Leaves setaceous. Bogs. 8in. Perenn. July. Brown. (3) £.B. 
1.1121. #£.B. 2.50. H.§ Arn. 490. Bab. 358. Lind. 280. 
S. Compressus. Compressed Bog-rush. Fig. 1378. 
Stem roundish. Spikes 2-ranked, many-flowered. Leaves flat, 
rough. 1 ft. Perenn. July. Brown. (3) 2#. B.1.791. E.B. 
2.51. H. & Arn. 491. Bab. 362. Lind. 280. 
S. rurus. Brown Bog-rush. Fig, 1379. 
Stem round. Spikes 2-ranked, few-flowered. Leaves channelled, 
smooth. 8-10 in. Perenn. July. Brown. (3) F. B. 1. 1010. 
E. B. 2,52. HH. §& Arn, 362. Bab. 491. Lind. 280. 
Genus 3. CLapIUM. 
C. mariscus. Twig-rush. Fig. 1380. 
Panicle repeatedly compound, leafy. Stem round, leafy. Leaves 
prickly on the edges and keel. Bogs. 3-4 ft. Perenn. July and 
Aug. Brown. (4) #. B. 1.950. E.B. 2.49. H. &§ Arn. 490. 
Bab. 358. Lind. 283. 
