129 



Original RxtitU*. 



A REVIEW OF THE BRITISH CHARACEJE. 



By Henry and James Groves. 



(Tabs. 207-210.) 



(Continued from p. 97.) 



iv. C. aspera, Willd. Gesells. Nat. Freunde Berl. (1809), iii., 

 p. 298; Wallr. Ann. Bot., p. 185, tab. vi., f. 3; Bruzel, Obs. 

 Char., pp. 12 and 22; GreviUe, Scott. Crypt., vi., No. 339; 

 Wilson, E. B. S. 2738; Coss. & Germ. Atl. Flor. Par., tab. 38, 

 fig. d.; Gant. Oesterr. Char., p. 15; Bab. A. N. H. (1850), v., 

 p. 90 ; Walhn. Act. Stockh., 1854, p. 322; Kiitz. Tab. Phyc, vii., 

 t. 51, f. 2 & t. 52; Braun, Consp. Char. Europ., p. 6; Braun, 

 R. Sc S. Exs. 11. 12. 50. 98. 99: Nordst. & Wahlst. Exs. 106-114. 



C. hispida, "Linn.," Flor. Danica (1829), t. 1940; Ruprecht. 

 Symb. ad Hist. PL Ross., p. 85 ; Nordst. Bot. Not. (1863), p. 44. 



C. delicatula and 0. interte.vta, Desv. in Loisel. Not. (1810), 

 pp. 137-8. 



C.fallax, Ag. Sysb. Alg. (1824), Introd., p. 28. 



O. piisilla f and C. equisetifolia , Kiitz. Flora (1834), p. 705. 



Stem slender, moderately branched, sometimes producing 

 smooth calcareous globular bulbils at the lower nodes, irregularly 

 corticate, the cortical cells" obliquely joined, bearing slender, 

 acute, spreading, spine-cells. Internodes long. Whorls of 6-9 

 nearly straight or incurved branchlets, in the male plant shorter 

 and more incurved than in the female. Stipulodes prominent. 

 Branchlets of 6-9 joints, usually but 2 ecorticate. Bract-cells 

 8-10, whorled, of nearly the same length, longer than the nucule. 

 Nucule ovoid, 13- striate, coronula obtuse, spreading. Dioecious. 

 (Tab. 207, fig. 4.) 



b. capillata, A. Br., Consp. Char. Europ. (1867), p. 6.— Spine- 

 cells many, very long. Usually of a bright clear green. 



c. subinennis, Kiitz. Sp. Alg. (1849), p. 521; Braun, Consp. 

 Char. Europ., p. 6. — Spine-cells very few and inconspicuous, 

 much shorter than in the type. 



d. tacustris. — Much smaller, 1-4 in. high. Branchlets short, 

 stout, incurved. Spine-cells papillate. A lake form. (Fig. 4a.) 



A small plant growing in dense masses, carpeting the lakes, &c, 



m w hich it occurs, usually greyish green, sometimes much incrusted. 



* The magnified stem in the ti-ute of this species, as well as in that of 



/" Con nivens } shows too few cortical cells, and in C. canexcms too many ft* 

 represented. 



»• *. vol. 9. [May, 1880.] * 



