NEW LICHENS. 175 
Buds crowded, sometimes.slightly branched. This is a 
minuter species than P. saxatilis, Ach., nor bas it the 
reticulated surface or retuse lobes of this species. 
38. P. stuppea, 'Tayl.; thallo coriaceo, suborbiculari, fusco- 
rufescenti, rugoso, lobis repando-crenatis, intus rufescenti, 
Stuppeo, subtus atro, levigato, ruguloso; gemmis margi- 
nalibus, pulveraceis, demum olivaceis; apotheciis margi- 
nalibus, demum planis, disco atro, levigato, margine 
tenui, undulato, incurvo, demum gevamifero, extus 
villosis. 
Has. Monterey, California ; Beechey, Hook. herb —Thallus 
2-3 inches wide, very uneven, the central parts minutely 
wrinkled, Under the shining black cuticle of the inferior 
surface a red membrane occurs; between which and the 
upper surface of the thallus there is a pale brown, cottony 
substance, which is much compacted. Black trice may 
be observed beneath. 
39, P. sparsa, Tayl.; thallo in maculam aggregato, albo, 
münutissimo, lineari, angulato, varie lacinulato, laciniis 
Subconvexis extus latioribus, subtus atro-fibrillosis; gem- 
mis granulatis, statim planiusculis ; apotheciis sparsis, 
minutissimis, disco subfusco, marginem album npe 
. mum demum æquante. 
flan. On bark ; St. Vincent's; Rev. L. Guilding, Hook. herb. - 
m appears as a brown spot, on which the min E 
white shreds or laciniæ are scattered : the margins of these 
- Tesemble a succession of white dots which are often con- 
à fluent, Apothecia not visible to the naked eye. Allied to Ee 
` P. eleina, Ach. ; but. the thallus is. far more minute, sad pr oc 
40. temiseypha, Tayl. halo suborbicular, inciso-k 
wea castaneo, lobis margine undulatis, cren: 
