LICHENES. 131 



aut albidas et subtus albas ac saxo late adhasrentes. Cortex superior 20-70 a crassus. albi- 

 dus, sursum rufescens, strato hyalino 10-20 a lato obtectus ac reagentibus solitis immu- 

 tatus; ineo hyphœ fastigiatœ, 3,75-5 tx crassee, in apice rotundatœ et 5-6<x metientes, satis 

 distinctes et arcte conglutinatee, articulâtes arliculis 2,5-3,73, passim 5 tx longis, non raro 

 sphœroideis, cum sepimentis parum crassis et lumine 2,5-4 a lato, seepe parum ramosa 3 . 

 Gonidia pallide virida, protococcoidea, 6-20 y. lata, membrana parum crassa, stratum parum 

 crassum et fréquenter byphis verticalibus interruptum sub cortice offerentia; inter ea hyphœ 

 3,75-4,5 [x crassee, pariete tenui, fréquenter articulâtes et inter ramos meatus prœbentes. 

 Medulla materia atrata cooperta, numerosos cristallos continens, e\ hyphis 4-6 txcrassis, lumine 

 trientem crassitudinis occupante, sub gonidiis la.\e, et inferne strictius implexis constans. 

 Cortex lateralis 30 [x latus et superiori similis. Apothecia 0,2-0,3 mill. lata, singula raro 

 bina in singulis areolis nata immersaque, rotunda thalloque paulum elevato, bene rufescentc 

 et in ambitu pallidiore aut albescente circumdata indeque concava atque disco obscure 

 rufo et nudo ornata. In perithecio incolorato, iodo eœrulescente, inferne et lateraliter 20-30 

 et in margine 50-80 tx lato, hyphœ horizontales, breviter articulatœ, ramosœ et stricte coalitœ, 

 lateraliter ascendentes et in margine flabellatœ ac breviter etiam articulâtes; gonidia prescipue 

 sub eo infero vigentia. Paraphyses hyalines, sursum rufescentes, obtuses ac cuticula hyalina 

 10 |x crassa coopertee, 90-120 a altee, 3,75-5 jx crasses, rectes et flexuosee, arcte coheerentes, 

 articulâtes articulis 8,75-12,5, et superne 2,5-5 jx longis cum sepimentis sat crassis et lumine 

 1,5-2 a lato, fréquenter connexo ramosee atque iodo leviter cesrulescentes. Thecas 70-75 y. 

 longes et 20 p. latœ, membrana prescipue in apice incrassata, et in basi atténuâtes ; spores in 

 quavis theca numerosissimes, 3,75-5 jx longes et 1,5-2 y. lates. 



Illa species ab Anglia originem ducit proindeque cl. Borrer ad suas figuras delineandas 

 speciminaauthentica facile obtinere potuit. Insuper exsiccatum a cl. Hepp juris publici fac- 

 tum his figuris omnino respondet proindeque, diagnosi adjuncta, species est firme stabilita. 



In Dania a cl. Branth ad lapillos in promotorio Skagen lecta paulum variât squamulis 0,6-1 

 et etiam 1,2 y. latis, seepe dispersis passimque tantum crustam areolatam formantibus. Apo- 

 thecia in quavis squamula nunc solitaria, nunc duo aut sex vigentia. Notes anatomices ad 

 amussim concordant, sed passim in cortice hyphes verticales magis numeroses fasciculatœque 

 fasciculis 20-30 y. latis. 



Saxicola in Asia-Minore; in Africa (in /Egypto); in America septenlrionali (in Canada et in 

 regionibus boreis et mediis) ; in Europa (in Scandinavia, Britannia-Majore, Gallia, Helvetia, 

 Tirolia, Germania et Grœcia). 



2. — HYPHE CORTICIS SUPERIORIS PASSIM SIMPLICES, PASSIM FREQUENTER RAMOS V. 



508. Acarospora theobromina Hue; Lecanora ceroina p. castanea a. discreta., b. 



contiguo, c. scutellaris, f. patellaris, y. pcraena Schesr. Enum critic. Lich. europ. 

 (1851), pp. 55 et 56, secundum specimina authentica in herb. Mus. paris, (secunda forma, b. 

 contigua est Parmelia cervina p. castanea Schesr., Lich. helvet. exsicc, n.8il); Lecanora 

 castanea Nyl. apud Lojka, Lich. regni Hungarici exsicc, n. 129, ad saxa calcaria prope 

 Budapest lecta (schedula ab ipsius Nylander manu scripta), in herb. meo. 



Thallus pallide vel obscure castaneus, auttheobrominus, crassus, opacus et squamosus; 

 squamas 1-45, raiïus 2-2,5 mill latee, raro discretae, rotundes, planas aut parum convexa 1 , 

 saepius contiguas, angulates et plagas irregulares et indeterminatas formantes; in ambitu 

 intégras seu lobulates ac albo griseove marginales; in superficie nunquam pruinosa?, in 

 exemplaribus a cl. Schasrer lectis semper lesves, in exsicc. Lojka n. 129, interdumgranulosa 1 

 rugosasve granulis rugisque thallo concoloribus ; lateraliter et subtus fere concolores et, 

 quando discretas, puncto sat lato, quando contiguac, gonipho plus minusve angusto, saxo 



