92 



HERRE 



Thallus indeterminate, of thickish, unequal, whitish, gray, or 

 yellowish brown warts, more or less dispersed or continuous and 

 granulate-areolate; hypothallus indistinct, black; KOH yellow; 

 CaCl202 faintly reddish yellowish. 



Apothecia numerous, scattered or conglomerate, from innate to 



sessile, i to i i mm. wide; disk black, long remaining flat, but finally 



convex and tuberculate or rugulose; margin at first elevated, entire 



or crenulate and sinuate, later disappearing; epithecium bluish 



black; paraphyses loosely coherent; hymenium colorless or pale 



gray, with I blue, soon turning brown; hypothecium brown, thick; 



5 — 10 

 asci inflated clavate; spores broadly elHpsoid, — — — r -"• 



Common on various rocks in the maritime region and in the 

 foothills, at no very great elevation. Originally described from 

 Sweden and not rare in the mountains of Europe. 



22. LECIDEA ENTEROLEUCA Ach. 



Lecidea enteroleuca Ach. Lich. Univ. 177, 1810. 



Lecidea enteroleuca Tuck. Syn. N.Am. Lich. II: 79. 1888, in part. 



Thallus a thin, effuse, granulose or minutely areolate or warty 

 crust, or now and then disappearing; the small areoles or warts 

 scattered, loosely approximate, or becoming crowded and even 

 heaped; grayish white to dark ashy gray; KOH yellow; CaCl202 — 

 or faintly reddish; hypothallus black. 



Apothecia from. 5 to 1. 5 mm. wide; disk black, at first flat, soon con- 

 vex, becoming subglobose; the thin, black, horny margin finally 

 disappearing; paraphyses loosely coherent; epithecium bluish to 

 brownish black; asci clavate, thecium pale reddish to colorless, 

 becoming blue with I; hypothecium colorless to dusky; spores 



5 — 10 



ellipsoid to broadly ellipsoid, sometimes falsely bilocular, — — — ^/^; 



spermatia long, needle-like, curved. 



Common on various rocks in the foothills and widely distributed 

 both as to latitude and altitude; a variable plant. 



According to the character of the thallus and color of the hypo- 

 thecium several forms are recognized, of which we have the follow- 

 ing: 



