LEMANIA. 7 1 



where the current has the greatest force, such as in mill 

 sluices and the most impetuous falls of cascades. 



" We have named our new genus Lemania. This name 

 comes from that of M. Leman, a modest naturalist, not less 

 learned in botany than in the other branches of science." 

 Bory. 



Kiitzing, in his " Phycologia Generalis," appears to have 

 studied this genus closely ; he there gives a beautiful, elabo- 

 rate, and accurate drawing of Lemania torulosa, from which 

 the figure of that species given in this work is chiefly derived. 



1. LEMANIA TORULOSA Ag. 

 Plate VII. 



Char. Frond nearly simple, incurved. Inflations of the stem 

 large, approximate. 



Lemania incurvata, filamentis simplicibus, incurvatis, arti- 

 culis in centra turgidis, Bory, Annales du Musee, vol. xii. 

 p. 181. pi. xxi. fig. 1. Chantransia (torulosa} virescente- 

 nigrescens, filamentis subsimplicibus, articulis ovatis, 

 medio tumidis, Cand. Syn. 10. Chantransie en colliers, 

 Cand. Flor. fr. 2. p. 50. Conferva (torulosa) filamentis 

 filiformibus, torulosis ; geniculis contractis, annularibus ; 

 articulis ovalibus, infiatis. Roth. Cat. Bot. 1. 200.; Fl. 

 German, iii. 527. Conferva (torulosa) filis torulosis, 

 simplicibus, continuis, filiformibus, &c., Roth. Cat. Bot. 

 iii. 250. Conferva (verrucosa) anomalacea, incurva, no- 

 dis eminentibus, approximatis, verrucosis, Draparn. MS. 

 ined. Conferva (fiuviatilis) filamentis simplicibus, seti- 

 formibus ; geniculis crassioribus, angulatis, Syst. Nat. 

 xiii. 11. 1392. Conferva fiuviatilis var. a, Encyc. Met. 

 Die. No. 12. (The synonyme of Vaillant ought to be 

 excluded as also that in the " Flore Fra^aise." Bory.) 

 Conferva nodosa var. a, Lam. Flor. fr. 1278. ix. Con- 

 ferva fiuviatilis nodosa, fucum emulans, Dill. Muse, 

 fig. 48. t. vii. Lemania torulosa, Ag. Spec. ii. p. 0. 

 Conferva fiuviatilis var. torulosa, English Botany, t. 



F 4 



