74 HERRE 



reous crust. Color a more or less evident rose-pink which soon fades 

 out in herbarium specimens, leaving them whitish or ashy gray. 

 Apothecia small, round, sessile, becoming convex; black, the disk 

 gray pruinose, but eventually naked; the proper margin prominent 

 but finally excluded. Epithecium dark or black, thick, 45 ^ to 50 /* 

 high, blue with I; hypo thecium black, broad, 42 to 60 /* high; para- 

 physes typical; thecium brick- or vinous-red with I; asci clavate, 



16.8 



straight or curved, sometimes pointed at tip, - -/*; spores 8, 



78 100 



colorless, fusiform, straight or slightly curved, 4 locular, /* 



Rare on maritime rocks, 50 to 75 feet above the sea, at Point 

 Lobos, San Francisco; associated with Dendrographa minor, Artho- 

 pyrenia halodytes, and some species of Trentepohlia. 



2. LECANACTIS CHLOROCONIA Tuck. 



Lecanactis chloroconia Tuck. Trans. Am. Phil. Soc., p. 



Lecanactis premnea b. chloroconia Tuck. Syn. N. Am. Lich. II: 



115. 1888. 



Thallus small, thin, uniform, smooth to granulose; definite 

 and limited by a black hypothalline line, or this obsolete, and the 

 thallus diffuse; yellowish-greenish to yellowish-ashen; KOH yellow; 

 CaCl 2 O 2 - . 



Apothecia small to medium size, circular, sessile, black; the disk 

 pruinose or finally naked; the proper margin erect, rather thin, 

 mostly entire, becoming somewhat angulose or wavy; epi thecium 

 granulose, greenish-blackish; hypothecium broad, black, continuous 

 with the broad black margin; paraphyses branching or simple, free, 

 their tips thickened and dark green; thecium colorless, turning wine- 

 red with I; spores mostly 4 locular, very rarely 3 or 5 locular, 

 finger-shaped or broadly spindle-shaped, straight or slightly curved, 



11 15 and rarely 17 



On bark oiAlnus, in tiny patches mixed with Opegrapha prosiliens, 

 on Gazos Creek, near the Pacific. 



A tropical lichen of wide distribution and occurring also in Europe 

 and over a great part of North America. 



