RHODOSPERME. 167 
wide-spreading branches, which throw out several series of similar lesser 
branches bearing ramuli more or less abundant, luxuriant specimens being 
excessively bushy and very difficult to display on paper without a con- 
Fic. 154. Ahnfeltia plicata. 
siderable amount of pruning. Tubercles containing spores are produced 
in the ramuli, solitary, or in pairs one above the other; tetraspores are 
imbedded in the branchlets, as represented in our illustration. The colour 
Fie. 155. Cystoclonium purpurascens. 
of this species is very variable; in early growth it is a reddish purple, but 
on exposure for a day or two it turns a pale yellow, and in drying, it 
shrinks and becomes a dull red purple, or sometimes nearly black, and 
