Ser. CHLOROSPERMEX. : Fam. Confervee. 
Puate XXX. 
CLADOPHORA BROWNII, dam. 
Gen. Coar. Filaments green, jointed, attached, uniform, branched. Frat 
ageregated granules or zoospores, contained in the joimts, having, at 
some period, a proper ciliary motion. CraporHora (Ad¢tz.)—from 
kdddos, a branch, and popéw, to bear; a branching plant. 
CrapopHora Brownit; filaments forming dense, cushion-like tufts, erect, 
rigid, flexuous, elastic, slightly branched; branches few, long, sub- 
simple, secund; axils acute; articulations four or five times longer 
than broad, the lower ones thickened upwards, the upper cylindrical. 
CrapopHora glomerata, y. Brownii, Hass. Brit. Fr. Wat. Alg. p. 213. 
Conrerva Brownii, Dillw. Suppl. t. D. Ag. Syst. Alg. p.105. Harv. in Hook. 
Br. Fl. 2. p. 355. Hare. in Mack. Fl. Hib. part 3. p. 228. Harv. Man. 
p- 134. Wyatt, Alg. Danm. N. 225. E. Bot. Suppl. t. 2879. 
Conrerva pulvinata, 2. Br. MSS. 
Has. In maritime situations exposed to the alternate influence of salt and 
fresh water; rare. Perennial. On wet rocks ina cave near Dunrea, 
R. Brown, Esq. On rocks at the entrance of a small cave beyond 
Black Castle, Wicklow (1833), W.H. H. Cornwall Coast, Mr. Ra/fs. 
Geogr. Distr. Ireland. Cornwall. 
Descr. Tufts very dense, cushion-like, spreading over the rocks in patches of 
indefinite extent, one to several inches in breadth, from half an inch to 
nearly an inch in thickness in the middle, gradually thinner towards the 
edges, of a black-green colour when growing, but exhibiting, on having the 
water expressed, and being held between the eye and the light, a beautiful 
clear, yellow-green tint. Filaments so matted together that it is difficult 
to separate a single thread, very rigid, erect, but apparently originating ina 
mass of creeping, branched, densely matted fibres, which form the base of 
the tufts, flexuous, irregularly branched; the branches long, simple, secund 
or subdichotomous. 4rticulations tolerably uniform in length, the lower 
ones clavate, the upper cylindrical ; joints contracted. Endochrome dense. 
Perhaps I transgress the true limits of a work on marine Alge 
by figuring in it a plant which belongs as much to the land as to 
the sea, and which is only occasionally wet with sea-water. I 
have two reasons for domg so. First, because the upper figure 
in the ‘Supplement to English Botany’, which was obviously 
made from dried specimens by an artist who had never seen the 
living plant, is so unlike the living C. Brownii that it is quite 
