LEMANIA. 73 



JluviatUe Cand. Flor. fr. 2. 50. Polysperma Jluviatllis 

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

 Conferva {Jluviatilis) Jilis suhramosis, sctaceis, nodosis, 

 geniculatis ; gcniculis torulosis, angulatis, §"c., Rotli. Cat. 

 Bot. iii. 304. Conferva jluviatilis filamcntis setaceis, 

 nodosis ; gcniculis elevatis, brevibus, articulis ohlongis, 

 cylindraccis, Eotli. Cat. Bot. i. 201.; Fl. German, 

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

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

 ^, Lam. Flor. fo. 1278. ix. Corferva {Jluviatilis) Jilis 

 simplicibus, setiformibus, rectis, gcniculis crassioribus, an- 

 gulatis, Lin. Sp. 1635. Conf crva Jluviatilis, luhrica, se- 

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

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

 Nodularia Jluviatilis Lyug. t. 29. Lemania Jluviatilis 

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

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

 tilis, English Botany, t. 17G6. Lemania Jluviatilis 

 Harvey, in Manual, p. 119. 

 Hab. In the Winterbourne Stream, Le^Yes : TV. Borrer, 

 Esq. In the stream at Hamsell, and at the Waterfall 

 at Harrison's Rocks in abundance : Mr. Jcnncr. 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 well apply to a plant much less frequent 

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

 from Sebastian Vaillant, better designates our Lemania, and 

 gives a very just idea of its bearing. 



" The Lemania corallina is one of the most common of 

 Conferva ; 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 fiills 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 cu'cumstance renders the 

 water in which it lias grown stagnant. 



