New North American lichens 



A. Zahibruckner 



J 



Blumer collected lichens in the vicinity of the Desert Botanical 

 Laboratory near Tucson, Arizona, and sent them to Professor Bruce 

 Fink to work over for an ecologic paper to be finished the follow- 

 ing May. The time for critical study being short and Professor Fink 

 being busy with the ecologic study, the writer was called upon to 

 aid him in the determination of some of the more difficult species. 

 The new species and the one variety described below result from 

 my work upon the collection. The type specimens are deposited 

 in the herbarium of the K. K. Naturhistorisches Hofmuseum at 

 Vienna ; type duplicates are in the possession of Professor Bruce 

 Fink of Miami University, Oxford, Ohio. 



Acarospora Carnegiei A. Zahlbr. sp. nov. 



Thallus rufescenti-cervinus vel rufescenti-fuscus opacus.KHO-, 

 CaCl 2 2 leviter erythrinosus, hyphis medullaribus partis centralis 

 squamorum substrato affixus, squamulosus, squamis plus minus 

 congestis, angulosis vel anguloso-rotundatis, 0.3-1 mm. latis, 

 -3-O-35 mm. crassis, modice convexis vel subplanis, subtus 

 obscuratis, utrinque corticatus, cortice 30-40// alto, pseudo- 

 parenchymatico, cellulis angulosis, leptodermaticis, minutis ; 

 gonidns infra corticem stratum latum continuum formantibus, 

 palmellaceis, globosis, 9-13 p latis, laete viridibus ; hyphis medul- 

 anbus intricatis, non amylaceis. Apothecia in squamulis primum 

 Hi evoluta tamen solitaria, immersa, 0.4-0.7 mm. lata, rotunda; 

 dls co concaviusculo vel piano, demum dilatato, dense caesio- 

 Pniinoso; margine proprio nigro, angusto, parum prominulo, 

 integro vel subintegro ; perithecio dimidiato, fuligineo, parum 

 lnc rassato ; epithecio pulverulento, crassiusculo, fuscescente, KHO 

 °ljvaceo-lutescente, CaCl 2 2 - ; hymenio decolore, usque 200 ft alto, 



leviter caeruleo, dein rufescente et demum obscurato ; paraphy- 

 S'dus crebris, filiformibus, conglutinatis, strictis, eseptatis, guttulis 



eosis minutis et numerosis impletis, ad apices haud latioribus ; 

 SC1S h ymenio parum brevioribus, oblongo- vel ellipsoideo-clavatis 



P'ce rotundatis et membrana incrassata cinctis, myriosporis ; sporis 

 ecoloribus, simplicibus, ovalibus, ovali-oblongis vel oblongis, 

 embrana tenuissima cinctis, 5-5. 5 ft longis et ad 2 ft latis. 



Species apotheciorum disco pruinoso et perithecio fuligineo 

 dl *idiat oq ue distincta. 



°n loose blocks of tuff or basalt. 



297 



