STICTEI. 265 
Fig. 47. 
Ricasolia amplissima Leight.—a. Vertical section of a young apothecium, x30. 
d, A theca and paraphysis, X350. c. Spores, x500. d. Vertical section of 
a spermogone, X30. e. Jointed sterigmata and spermatia, x 500. 
species occur in the more humid tracts of our islands. The tribe has 
been divided by Nylander into the following 2 subtribes, comprising 
5 genera, founded npon differences in the structure and character of the 
thallus, the presence or absence of cyphelle, and the nature of the apo- 
thecia. 
Subtribe I. STICTINET Nyl. Flora, 1879, p. 360. 
Thallus either cyphellate or ecyphellate beneath ; gonidial layer 
consisting of gonimia arranged in pluri-locular nodules. Apothecia 
lecanoroid, rarely parmeleine. 
Distinguished by the nature of the gonidial layer, which separates it 
as a very distinct subtribe. The plants are easily recognized by this 
layer presenting under the lens, or even to the naked eye, a bluish or 
leaden-bluish appearance. 
44. STICTINA Nyl. Flora, 1860, p. 66, Syn. i. p. 333.—Thallus 
variously lobate or laciniate, often sorediiferous ; beneath cyphellate 
or pseudocyphellate, with simple rhizine (rhizohyphe Nyl.); gonimia 
often 2-3 moniliform. Apothecia usually with septate spores. 
Spermogones innate, not prominent, with spermatia somewhat short, 
obtusely and slightly thickened at either apex. 
