CHARGE AUSTRALES ET ANTARCT1CI 203 



b. Charœ diplostephanœ, stipulanim ad basiu verlicilli série duj)lici. 

 a, ecorticatœ, caule foliisque ecorticatis. 



j3 } corticatœ isostichœ, caule corticato, seriebus tubulorum cor- 

 ticis simplici foliorum numéro (foliis corticatis). 



To a belongs Ch. denudata, A. Br., from South Africa ; to /3, Ch. imperfecta, 

 A. Br., from North Africa, and tbe European Cb. crinita, "Wallr. 



y, corticatœ diplostichœ, caule corticato, seriebus tubulorum cor- 

 ticis duplici foliorum numéro. 



* gymnophyllœ, foliis ecorticatis. 



* * phlœophyUœ, foliis corticatis, articulis superioribus 



nonnunquam nudis. 



To * belongs Cb. Kokeilii, A. Br. and Ch. gymnophylla, A. Br. from the South of 

 Europe; to * * Ch. foetida, A. Br. (vulgaris, Auct.), contraria, A. Br., strigosa, A. 

 Br., tenuispina, A. Br., papilïosa, Kiitz., hispida, Auct., Baltica, Tries, Rabenhorstii, 

 A. Br., ceraiophyîla, Wallr. (tomentosa, L.,) and some exotic species. 



§, corticatœ triplostichœ, caule corticato, seriebus tubulorum 

 corticis triplici foliorum numéro. 



* phlœopod.es, foliis inde a basi corticatis. 



The European species belonging to this division are Ch. aspera, Willd., gaïioides, 

 De C, connivens, Salzm., wAfragilis, Desv. {vulgaris, L.,) 



* * gymnopodes, foliorum articulo infimo ecorticato, 



sequentibus corticatis. 



The species belonging to this division are ail exotic, as Ch. gymnopus, A. Br., 

 from Egypt, Ch. Commersonii, A. Br., from Tsle de France and Bourbon, Ch. pohj- 

 phylla, A. Br., with its varieties from East India, North and South America, Ch. 

 sejuncta, A. Br., from South America, &c. 



It is one of the sirigularities resulting from the preceding enumera- 

 tion, tliat ail the true Charœ of Australia belong to the division Haplo- 

 steplianœ ; while in ail other parts of the earth the division of Diplo- 

 stephanœ prédominâtes, a division which seems entirely absent in 

 Australia. In this manner the same law appears to be repeated in the 

 little family of Characeœ, that prevails in the great divisions of the vege- 

 table and animal kingdom in Australia, namely, the law, according to 

 which even the most perfect types, having received the largest extension 

 in other parts of the world, and especially in the old, are completely 

 wanting, or scarcely represented in Australia. 



Freiburg, Grand Ducby of Baden, March, 1849. 



2 D 2 



