184 MONOECIA TRIANDRIA. [CI. 21. 



prickly, with the broad, rough-edged, cloven, spreading beaks of 

 the fruit. Spikelets roundish, mostly simple. Root fibrous. 

 Moist past. If. 5, 6. Bright grass-green. Spikel. ovate, thin, globose. 



17. C. divulsa,9. 629. (GreyC.) Spike elongated, lax; with the spikelets 



of its lower half finally very distant, mostly single. Fruit erect, 

 smooth-edged ; roughish at the cloven point of the beak. Root 

 fibrous. 

 Moist past. V-. 5. Bright green ; 1— H/. weak. Sp. whitish. 



18. C. vulpina, 5. 307. (Compound Prickly C.) Spike thrice com- 



pound, dense, obtuse. Fruit spreading, with a notched rough- 

 edged beak. Scales pointed. Angles of the stem compressed, 

 very sharp. 

 Watery pl.lf . 5. Firm, 2 f. Sp. ovate, green. Fr. spreading, brown. 



19. C. teretiuscula, 15. 1065. (Lesser Panicled C.) Spike twice or 

 thrice compound, dense. Fruit spreading, tumid at one side, 

 with a tapering, serrated beak. Stem triangular, with convex 

 interstices. 



Watery mead. %. 5. R. slightly creeping. Stem 1 — \hf slender, 

 Fr. brown. 



20. C. paniculdta, 15. 1064. (Great Panicled C.) Spike thrice com- 



pound, loosely panicled, interrupted, acute. Fruit spreading, 

 with an abrupt serrated beak. Stem sharply triangular, with flat 

 interstices. 

 Marshes. lf..6.R. tufted. Stems stouter, 2— 3 f. ; angles very rough. 



**** Barren and fertile Jlorets in separate catkins; the barren catkin 

 solitary. Bracteas membranous. Stigmas 3. 



21. C. digitdta, 9. 615. (Fingered C.) Bracteas membranous, sheath- 



ing, scarcely leafy. Catkins linear, lax, erect ; the barren one 

 shortest ; fertile, two or three. Leaves flat. 

 Shady chalky pi. 1/1 . 5. Aspan high. Scales abrupt, reddish brown. 



22. C. clandestina, 30. 2124. (Dwarf Silvery C.) Bracteas membra- 



nous, scarcely leafy. Fertile catkins remote, of few flowers, in- 

 closed in the sheathing bracteas. Leaves channelled. 

 Limest. rocks, Bristol. If. 5. I — 3 in. Scales of a silvery whiteness. 



**** Barren and fertile florets in separate catkins ; the barren 

 catkin solitary, rarely more than one. Bracteas leafy and 

 generally sheathing. 



23. C. pendula, 33. 2315. (Great Pendulous C.) Sheaths nearly as 



long as the flower-stalks. Fertile catkins cylindrical, very long, 

 drooping. Fruit densely crowded, ovate, beaked. 

 Moist woods.lf . 5. 7. R.fibr. Stem 3 — 6f L. large, recurved, harsh. 



24. C. strigosa, 14. 994. (Loose Pendulous C.) Sheaths nearty equal 



to the flower-stalks. Catkins slender, loose, slightly drooping. 

 Fruit lanceolate, triangular, ribbed. 

 Groves & thickets, rare. If.. 4 — 6. R.fibr. Stem2f. more slender 

 as well as the leaves. 



25. C. sylvatica, 14. 995. (Pendulous Wood C.) Sheaths not half 



