LEMANIA. 73 



Jluviatile Cand. Flor. fr. 2. 50. Polysperma Jluviatilis 

 Vauch. Conf. p. 99. PI. 1. fig. 3. et pi. x. fig. 1, 2, 3. 

 Conferva (^Jluviatilis) Jilis suhramosis^ setaceis, nodosis, 

 geniculatis ; geniculis torulosis, angulatis, ^'c. Roth. Cat. 

 Bot. iii. 304. Conferva Jluviatilis Jilamentis setaceis, 

 nodosis ; geniculis elevatis, brevibus, articulis oblongis, 

 cylindraceis, Roth. Cat. Bot. i. 201. ; Fl. German. 

 iii. 528. Conferva Jluviatilis var. /3, Encyc. Met. Die. 

 No. 12. ; Thore, Chloris, 441. Conferee rameuse var, 

 ^, Lam. Flor. fo. 1278. ix. Conferva (^Jluviatilis) Jilis 

 simplicibus, setiformibus, rectis, geniculis crassiorihus, an- 

 gulatis, Lin. Sp. 1635. Conf erv a Jluviatilis, lubrica, se- 

 tosa, equiseti facie, Dill. Muse. viii. f. 47. Corallina 

 Jluviatilis non ramosa, Yaill. Paris, p. 40. t. iv. fig. 5. 

 Nodularia Jluviatilis Lyng. t. 29. Lemania Jluviatilis 

 Kiitzing, Phyeologia Generalis, p. 322. ; Dillw. Brit. 

 Conf. PI. ; Hooker, Brit. Flor. ii. p. 322. Conf Jluvia- 

 tilis, English Botany, t. 1766. Lemania Jluviatilis 

 Harvey, in Manual, p. 119. 



Hab. In the Winterbourne Stream, Lewes : W. Borrer, outry^^ 

 Esq. In the stream at Hamsell, and at the Waterfall L^r^^i^ 

 at Harrison's Rocks in abundance : Mr. Jenner. Com- £^(^-; 

 mon in rapid streams about Aberdeen : Dr. Dickie. ^^'^ 

 Frequent in Ireland : Mr. Moore. ^^ 



" The name of Jluviatilis, adopted after Dillenius by /^ 



authors, does not weU apply to a plant much less frequent 

 in rivers than any one of its congeners. The name, borrowed 

 from Sebastian Yaillant, better designates our Lemania, and 

 gives a very just idea of its bearing. 



" The Lemania corallina is one of the most common of 

 Confervas. ; it is frequently found attached to stones, and upon 

 stakes that are always covered with water, near mill-dams, 

 or against the sides of their channels. I have seen falls which 

 were quite covered ; the more rapid the current the more 

 the Lemania prospered. It becomes sometimes more than 

 half a foot in length, and of a considerable diameter. The 

 plant languishes or dies when any circumstance renders the 

 water in which it has grown stagnant. 



