CYPERACE^. 



381 



3. ferrugineus. Bristles 3-5, exceediug 

 seed. Spicules 2-3, in a lateral head, ou the 

 summit of the round, naked cidm. L. of luvol. 

 2, nearly equal. L. subulate, p. 5, 6. Peaty 

 meadows. Jura. Prov. G. Sw. 



827. CLADIUM. 



1. Mariscus. The Stem round, smooth, 

 branched, leafy. Spikes in heads, in a com- 

 pound panicle. L. prickly on the margin and 

 keel. 



828. RHYNCHOSPORA. 



1. alba. Spicules crowded in a fastigiate, 

 somewhat corymbose head, equalling involucre. 

 Stamens 2. Bristles of Seed about 10. L. 

 subulate, p. 7, 8. Boggy meadows. 



2. fusca. Spicules crowded in an ovato- 

 oblong head, much shorter than involucre. 

 Bristles of Seed 3. L. filifomi. p. 6, 7- 

 Boggy meadows, occ. Not in It. 



829. BLYSMUS. 



1. coxnpressus. Stems 3-edged. L. 

 keeled. Lower Bract subulate, somewhat leafy. 

 Spike 2-rowed. Spicules of 6-8 florets. 

 Bristles of Seed with reversed prickles, p. 

 7,8. Moist ■pastures, n. and m. Eur. 



2. rufus. Stem round. L. very narrow, 

 grooved. Bracts membranous. Spicules of 2-5 

 Horets. Bristles (if any) with erect pubescence. 

 p. 6, 7- Salt meadows. Br. n. G. 



830. SCIRPUS. 



A. Culm simple, with a solitary terminal 

 spike. 



i. Heleocharis. Style dilated at base, but 

 contracted at its vmion with the germen. 



a. Stigmas 2. Seed lenticulax. Sp. 1-5. 



b. Stigmas 3. Seed 3-edged. Sp. 6-7. 

 ii. Style simple, continuous. Stigmas 3. 



Sp. 8-11. 



B. Culm simple, nearly naked. Spikes ap- 

 parently lateral. 



i. Spicules not in a globular head. 



a. Glumes entire, mucronate. Sp. 

 12-15. 



b. Glumes emarginate, mucronate. Sp. 

 16-21. 



ii. Spicules united into 1 or more globes. 

 Sp. 22. 



C. Culm simple. Panicle leafy. Bristles 

 of Seeds with reversed prickles. Sp. 23-27. 



D. Stem branched, leafy. Sp. 28. 

 Not well known. Sp. 29. 



A. Culm simple, with a single terminal 

 spike. Sheat/is leafless. 



i. Style dilated at base. Heleocharis. 



a. Stigmas 2. Seed lenticular. 



1. palustris. Margin of Seed obtuse. 

 Lower Glume short, extending half-way round 

 the spike. Culm subcompressed : sheath hori- 

 zontally truncate. Root creeping, p. 6, 7- 

 Wet. 



2. iiniglumis. Margin of Seed obtuse. 

 Lower Glume short, extending all round the 

 spike. Culm round. Root creeping, p. 6-8. 

 Wet. St. Germain. G. Shores of L. Geneva. 

 England. 



3. ovatus. Margin of Seed acute. Stig- 

 mas 2, remaining. Base of Style triangular, 

 as broad as long. Spike broadly ovate. Glumes 

 very obtuse ; lower not larger, embracing half 

 the base of the spike. Culm round, with leaf- 

 less sheaths. Root fibrous, a. 6, 7- Splashes. 

 Fr. G. VaUey of Po. 



4. atropurpureus. Seed obovoid, com- 

 pressed, with acute edges. Remaining Base of 

 Style round, depressed, somewhat saucer- 

 shaped. Glumes very obtuse ; lowest not larger, 

 embracing half the base of the spikes. Culm 

 round. Root fibrous, a. 7, 8. Moist sandy. 

 Between Lausanne and Merges. 



5. carniolicus. Seed obovate, smooth, 

 compressed, with acute edge. Remaining Base 

 of Style lanceolate, three times as long as 

 broad. Glumes obtuse ; lowest not larger, 

 embracing the whole base of the spike. Root 

 fibrous, a. 7, 8. Wet meadows. Adelsberg 

 in Cai-n. 



b. Stigmas 3. Seed %- edged. 



6. xaulticaulis. Outer Glume subrotund, 

 not longer than the others, embracing whole 

 spike. Culm round, mth obliquely truncate 

 somewhat acute sheath. Root fibrous, p. 7. 

 Boggy. Not in Sw., and onli] in one or two 

 places in G. Not in It. 



7. acicularis. Seed finely striped. Outer 

 Glume of Spike larger, acuminate, \^dth a leaf- 

 less sheath. Culm square. Root creeping. 

 a. 6-8. Splashes. Eng. occ. Fr. occ. G. It. 

 occasionally . 



ii. Style simple, continuous. Culm round. 



8. parvulus. Culm hoUow with trans- 



