﻿New Species of Lichens from Southern California determined 



Professor W, Nylander. 



By H. E. Hasse. 



Lecanora praecrenata Nyl. 



Thallus of rugose furfuraceous small distinct rounded squamules 

 or united to larger ones and then rimose, with a rounded lobu- 

 late outline of light green clay color : apothecia from one-half to 

 less than one millimeter in diameter ; disk flat, black, pruinose, 

 with a permanent crenate white margin : spores 4-6 in asci, 

 globular, 20 in diameter, with finely granular contents. Hym. 

 Gelat. J. -f blue, changing to greenish yellow, which color the 

 spores at once assume. 



the L. cinerea group. On disintegrated granite and clay. 



Of 



Mountains 



Arthon 



Thallus effuse, white with a flesh-colored tint when wet, epi- 



phlaeoidal : apothecia small, round, to larger and oblong, elevated, 



dark brown to black, slightly pruinose, with a thin scaly thalline 



margin: spores simple and 1-3 -septate, oblong, 12-16 fi long, 

 5-6 /a wide. 



On Cordia sp.— a Brazilian shrub or tree cultivated at th e 

 Agricultural Experiment Station at Santa M 



onica. 



Thejlopsis subporinella Nyl. 



Thallus indistinct of small pale ochraceous colored globules, 

 between thickly studded concolorous more elevated globular 

 immersed apothecia, forming patches from one-half to one centi- 

 meter in diameter, with an irregular outline : epithecium darker, 

 punctiform, depressed: "thecae polysporae, sporis oblongis, 120- 

 140 ft long. 4 fi crass." Simple or 1 -septate. 



On bark of Umbellularia Califomica. Malibu Canon, Santa 

 Monica Mountains. August, t 8nK 



Lecidea triphragmioides Nyl. sp. nov. 



Thallus cartilaginous rugulose, rimose, areolate, ash colored : 

 apothecia numerous, small to medium ; disk black, papillate, flat 

 to slightly convex and indistinctly pruinose ; margin black, thick, 



(632) 



