22 HEPPIBARUM 



Lichenograph. europ., p. 63, inRev. Botan., t. V, 1886- 

 1887. 



Lecanora purpurascens Nyl. Collect. lichenolog. Gall. meridion. et 

 Pyren., p. 13, in Nya botanisk. Nolis., 1853, et Prodrom. Liche- 

 nogr. Gall. et Alger., in Act. Soc. Linn. Bordeaux, t. XXI, 1857, 

 p, 326, secundum spécimen archetypum ad Mirval regionis Monspe- 

 liensis, ad saxa calcaria ab ipso lectum, in herb. Mus. paris. 



Thallus nigro castaneus opacus et granulatus ; granula 

 0,3-0,4 mill. lata, parum crassa, angulato rotunda, in pe- 

 ripheria radiantia, in centro continua vel confluentia crus- 

 tamque rimosam formantia ; in superficie, in peripheria 

 convexa et nuda, in centro applanata et albo pulverulenta ; 

 intus albida; subtus hyphis albidis vel passim purpuras- 

 centibns late saxo affixa. Hyphse protothallinse 5-10 [l 

 crassse, articulatae articulis brevibus, pariete crasso, mate- 

 ria calcaria obsitse, verticales et varie directse, satis stric- 

 te aggregatse stratumque 120-140 \j. crassum prsebentes. 

 Granula sursum et inferne viridi flaventia et hydrate ka- 

 lico intensius tincta. Cortex inferior 20-25 [x latus plec- 

 tenchymaticus cum cellulis sphsericis 8-10 (x latis, pariete 

 tenui. Medulla ex hyphis 4-5 jx crassis, septatis, ramosis 

 ramis anastomosantibus reteque maculis magnis vel etiam 

 maximas lacunas efficientibiis composita ; super illam vel 

 reliquum granulum ex toto plectenchymaticum vel inferne 

 tantum plectenchymaticum vel sursum hyphse verticales 

 et ramosse, articulatse articulis longis. Gonidia paUide 

 viridia, ad speciem Algarum Glœocapsajn auratam Stiz. 

 (teste D""' Bornet) pertinentia, 6-12 i^ lata, unicum vel 3-4 

 in vaginis crassis et rotundis, diam. 10-20 |a metientibus, 

 vigentia, stratum parum crassum sed densum superne for- 

 mantia et usque ad summas hyphas gonidiales ascenden- 

 tia, in strato subtus adjacenti dispersa, in medulla nuUa 

 ac in cortice inferiore rara. Apothecia 0,2-0,3 mill. lata, 



