LONDON BOTANICAL EXCHANGE CLUB. 73 
and the question of whether it be really dicecious investigated upon a 
good range of living specimens. All the other Zolypelle are monc- 
cious; and as all our other British Characee are now shown to be 
‘identical with plants known upon the Continent, it is a point of con- 
siderable interest to ascertain if we have really a distinct species here. 
A plant gathered many years ago by Dr. Moore in Lough Neagh, and 
suspected by him at the time to be the true nidifica, of the * Flora 
Danica,’ may not unlikely prove to be really so. It has been submitted 
to Dr. Braun for his opinion, and his reply is, ** Habitus et folia 
omnino zidifice, sed seminibus minoribus magis contortis accedit ad 
C. fasciculatam (intricatam)." We can, therefore it seems, only rely, 
with confidence, upon two British species, which should be called iz- 
tricata and glomerata, and there are two others (nidifica and Smithii) 
which may prove distinct, but which must be left over for further in- 
vestigation. We give the diagnosis of nidifica and the two accepted 
ones, from Kützing's ‘Species Algarum,’ with a few synonyms. , 
l. C. intricata, Roth; “mediocris, semilinea crassa, ramis verti- 
cilloram articulatis, ad genicula inferioria ramulifera, ramulis infimis 
furcatis elongatis multiarticulatis, apice subtiliter apiculatis, verticillis 
fructiferis dense aggregatis, spermatiis in axillis verticillorum et geni- 
culis ramorum inferioribus dense conglomeratis, perispermio pellucido, 
a latere 18-striato. Monoica.”—Roth, Catal. Fasc. vol. i. p. 125. Wi- 
tella intricata, Ag. Syst. Alg. p. 122; Billot, Fl. Exsice. 1393; Ra- 
benhorst, Dec. Alg. p. 68; Braun, Rabenh., Stiz. Char. Exsice. n. 18. 
C. fasciculata, Amici, Descriz. p. 16. t. 5. f.3. Nitella fasciculata, 
A. Braun, Schw. Char. p. 11; Kütz. Sp. Alg. p. 517. C. polysperma, 
A. Braun, Flora, 1835, p. 56; Bab. Man. edit. 6. p. 448. Nitella 
polysperma, Kütz. Phyc. Gen. p. 318 
B. robustior, Kütz , ramis festieiliótum sterilium indivisis.— Chara 
prolifera, Liz.; A. Den. Flora, 1835, p. 56, non Bab. Man. edit. 6. 
447. Nitella prolifera, Kütz. Phyc. Germ. p. 255. O. Borreri, Bab. 
Man. 1. c. 
2. C. glomerata, Desv. ; ** parvula, fruticulosa, ramis verticillorum 
sterilium simplicibus dongui plerumque 3- articulatis, fertilium con- 
glomeratis, 4-articulatis, ad genicula infima 3—4 ramulis lateralibus 
brevioribus 3-articulatis instructis, apicibus obtusis; spermatiis aggre- 
gatis in axillis verticillorum vel in geniculo infimo ramorum, minutis, 
obsolete striatis. Monoica."— Desv. in Lois. Not. p. 135. A. Braun, 
