VAUCHERIA. 57 



A second racemose species is described by Yaucber, but 

 tliis has not as yet been found in England ; it differs in several 

 essential respects from Vaucheria racemosa. The grains, like 

 those of V. racemosa, are all supported on a connnon peduncle 

 furnished with pedicels ; but they are much larger and of a 

 different form, and each, moreover, is supplied with a distinct 

 anther. 



e. Capsules in jmirs, terminal. 



11. Vaucheria otoidea Vauch. 



Plate V. Fig. 3. 



Char. Capsules in terminal pairs, a recurved anther being 

 placed between each pair. 



Ectosperma ovoidca Vauch. Hist. p. 30. ; Spec. Plant. 

 ~ p. 1634.; Flor. Aug. p. 954.; Flor. Scot. ^. 979.; 



Withering, iv. p. 129. ; Koth. Flor. Germ. p. 1. No. 7. ; 



Cat. Bot. i. p. 16., ii. p. 192.; Conf. amphibia Jibrillosa 



et sp)ongiosa Dill. Hist. Muse. p. 22. t. 4. fig. 17. B. 



and C. B. ramis elongatis ; Grev. Alg. Brit. p. 194.; 



Harv. in Plook. Br. Flor. p. 320.; Conf. amphibia 



Dillw. t. 41.; Conf. furcata B. Fl. Ang. p. 592.; 



Withering, iv. p. 128.; Ceramium caspitosum Both. 



Flor. Germ. iii. pp. 1. 475.; Cat. Bot. i. p. 154. ii. 



p. 186.; Conf palusti'is Jilamentis brevioribus et crassior- 



ibus Bay, Syn. p. 447. 



" Amongst flowering plants we find several instances of 

 striking varieties produced by the more or less watery 

 situation in which individuals chance to grow ; and perhaps 

 no botanist would acknowledge the two most opposite 

 varieties of Myosotis scorjyioides, or Lotus corniculatus, to 

 be the same species, Avithout an opportmiity of tracing them 

 through their several gradations. The same may be said of 

 the present plant, which has hitherto formed two species, and 

 it is only after a careful examination that I have united 

 them as one." 



