l8o HERRE 



13. LECANORA PACIFICA Tuck. 

 Lecanor a pact fica Tuck. Syn.l>i. Am. 'Lich.l: 191. 1882. 



Thallus thin, from smooth and uniform becoming chinky, rough, 

 and warty; dirty white and grayish; KOH yellowish; CaCl202 — . 



Apothecia small to medium, appressed, fiat; disk pale to dull yel- 

 lowish and tawny, or darker, usually thin greenish pruinose; the 

 white margin crenulate, persistent, often fiexuous; paraphyses slen- 

 der, agglutinate; epithecium yellowish or brownish, granular; the- 



cium indigo with I; spores ellipsoid, — /<• 



12 — 17 



On trees, growing in small patches intermingled with Lecanora 

 subfusca and Lecanora hageni. Recorded only from CaUfornia, Ore- 

 gon, and Vancouver Island. Tuckerman says "The plant is com- 

 mon and very observable among the bark-lichens of our Western 

 Coast." This does not accord with the experience of either Dr. 

 Hasse or myself; on examination of the material in the Tuckerm. 

 Herb, it seems to me to be too close to Lecanora subfusca to be readily 

 separable. Such other material as I have seen under this name else- 

 where has been Lecanora albella cancriformis. 



Separated from subfusca by the pruinose apothecia, the aggluti- 

 nate paraphyses, and the granular epithecium. 



14. LECANORA HAGENI Ach. 



Lecanora hageni Ach. Lich. Univ. 367. 1810. (excluding varieties). 

 Lecanora hageni Tuck. Syn. N. Am. Lich. I: 188. 1882. 



Thallus effuse, very thin and disappearing, or of tiny scattered 

 warts; color white, grayish- white, ash-colored, or greenish-dusky; 

 KOH- ;CaCl202-. 



Apothecia minute to small, numerous, thin, flat, often contorted 

 from being crowded; disk plane, pale to dark brown, and blackening, 

 densely gray pruinose; the conspicuous white margin thin, erect, 

 persistent, entire or denticulate; paraphyses rather slender, their tips 

 slightly brown; said to be jointed, though I do not find them so. 



Spores ellipsoid, —^ P- 



10 — 14 



