NEW LICHENS. 185 
dusky olive tufts, about half an inch high; tops of the 
lobes rounded : sometimes on the white fractured surface 
whence the apothecia have fallen, several very minute, 
crowded, young, blackish apothecia are observable. Some- 
times two adjoining lobes coalesce, as do the apothecia on 
their summits. Lamina proligera excessively thin, and 
dark green. Allied to D. pruinosa, Nees; but the flat 
immersed disks of the apothecia and the tuberculose and < 
coarctate lobes of the thallus keep it very distinct. i3 
2. D. simplex, Tayl.; thallo cæspitoso, solidiusculo, palli- 
dissime cinereo, tereti, filiformi, simplici, longitudinaliter 
corrugato; apotheciis in ramuli brevis apice terminalibus, 
disco concavo, concolori, margine integerrimo. = = 
Has. West coast of North America; Menzies.—Nearly two 
inches high, Scarcely as thick as packthread. It has the - 
habit of Cenomyce gracilis, Ach., but is not so acuminate, 
nor has it pale greenish granular buds. 
CENOMYCE, Ach. 
C. spherulifera, Tayl. ; thallo foliaceo, "iM.  cinereo- * D om 
E subtus albo, laciniis inciso-crenatis ; podetiis cylin- E 
dricis, angustis, simplicibus, cinereis, subpellucidis, glabris; - 
gemmis albidis, minutissime granulatis, statim. eylu 
 SCyphis. brevissimis; apotheciis cong 
coccineis, madore r nigris, substipitatis. - is : "d 
Han. | i Mn C. Pudor Hook kerh This species 
appears distinct from C. bacillaris; Ach., by the more . 
numerous and conglomerate apothecia, which are scarlet 
“He dry, but turn black when wetted ; and ius the su 
