VAUCHERIA. 57 



A second racemose species is described by Vaucher, but 

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

 essential respects from Vaucheria racemosa. The grains, like 

 those of V. racemosai are all supported on a common 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 pairs, terminal. 



11. Vaucheria ovoidea Vauch, 



Plate V. Fig. 3. 



Char. Capsules in terminal pairs, a recurved anther oeii^ 

 placed between each pair. 



Ectosperma ovoidea Vauch. Hist. p. 30. ; Spec. Plant, 

 p. 1634.; Flor. Ang. p. 954.; Flor. Scot. p. 979.; 

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

 Cat. Bot. i. p. 16., ii. p. 192.: Conf. amphibia fibrillosa 

 et spongiosa Dill. Hist. Muse. p. 22. t. 4. fig. 17. B. 

 and C. B. ramis elongatis ; Grev. Alg. Brit. p. 1 94. ; 

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

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

 Withering, iv. p. 128.; Ceramium ccespitosum Koth. 

 Flor. Germ. iii. pp. 1. 175.; Cat. Bot. i. p. 154. ii. 

 p. 186.; Conf palustris 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 scorpioides, or Lotus corniculatus, to 

 be the same species, without an opportunity 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." 



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