138 
P. longifolius. Long-leaved Pond-weed. Fig. 1371. 
Leaves elongate-lanceolate, narrowing below. Stipules winged. Pe¬ 
duncle very long, thickened upwards. Lakes. Perenn. Aug. Brown. 
(§) E. B. Supp. 2847. H. fy Am. 352. Bab. 482. 
Genus 2. Ruppia. 
It. MARITTMA. Fig. 1372. 
Leaves submersed, long, linear; sheaths inflated. Salt ditches. 
Flower-stalks long, often spiral. Perenn. June and July. Green. 
(|) E.B. 1. 136. E.B. 2. 248. H. <£* Am. 485. 'Bab. 355. 
Lind. 251. 
Genus 3. Zannichellia. 
Z. palustris. Horned Pond-weed. Fig. 1373. 
Leaves grass-like. Flowers axillary, monoecious. Ditches. Ann. 
Aug. Greenish. (§) E.B. 1. 1844. E. B. 2. 1240. H. fy Am. 
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. (|) E.B. 1.467. E.B. 2. A. H.tyAm.487. Bab. 
356. Lind. 251. 
Order CV. CYPERACEtE. 
Genus 1 . Cyperus. 
C. longus. Sweet Cyperus. Fig. 1375. 
Stem triangular. Umbel leafy, twice compound. Bogs; rare. 
2-3 ft. Perenn. July and Aug. Brown. (|) E. B. 1. 1309. 
E.B. 2. 55. H.fy Am. 489. Bab. 357. Lind. 279. 
C. fuscus. Brown Cyperus. Fig. 1376. 
Stem triangular. Umbel compound. Involucrum of three leaves. 
Bogs; rare. 4-6 in. Ann. July. (§) E.B.Supp. 2626. E.B. 2. 
55*. H. Am. 489. Bab. 357. Lind. 279. 
Genus 2. Schienus. 
S. nigricans. Black Bog-rush. Fig. 1377. 
Stem round, naked. Flowers in roundish heads between two leaves. 
Leaves setaceous. Bogs. 8 in. Perenn. July. Brown. (§) E.B. 
1.1121. E.B. 2. 50. H.fyArn. 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. (§) E. B. 1. 791. E. B. 
2. 51. Ii. fy Am. 491. Bab. 362. Lind. 280. 
S. rufus. Brown Bog-rush. Fig. 1379. 
Stem round. Spikes 2-ranked, few-flowered. Leaves channelled, 
smooth. 8-10 in. Perenn. July. Brown. (|) E. B. 1. 1010. 
E. B. 2. 52. H. Am. 362. Bab. 491. Lind. 280. 
Genus 3. Cladium. 
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. (|) E. B. 1. 950. E.B. 2. 49. II. Am. 490. 
Bab. 358. Lind. 283. 
