138 E. A. Vainio, Lecideales. 



Th. candidum (Web.) Mass. 



Thalloidima Mass. Ric. Lich. Crost. (1852) p. 338, f. 197; Korb. 

 Syst. Lich. Germ. (1855) p. 179; Th. Fr. Lich. Arct. (1860) p. 173; Arn. 

 Lich. Frank. Jur. (1884) p. 147. Lichen candidus Web. Spic. Fl. Gott. II 

 (1878) p. 193. Lecidea Candida Ach. Meth. Lich. (1803) p. 79, Lich. Univ. 

 (1810) p. 212, Syn. Lich. (1814) p. 50 (p. p.); Nyl. Lich. Scand. (1861) 

 p. 215. Toninia Th. Fr. Lich. Spitsb. (1867) p. 33 (specim. non vidi), 

 Lich. Scand II (1874) p. 338 p. p. 



Exs. Moug. et Nestl. VII (1820) n. 642. — Desmaz. PI. Cr. 

 Fr. XXIII (1841) n. 1140, ed. 2 n. 540. — Rabenh. Lich. Eur. I (1855) 

 n. 12. 



Thallus squamosus, squamis repentibus adpressisque, foliaceo- 

 applanatis, demum lobatis crenatisve, ambitum versus sat tenuibus et 

 subplanis, medio demum incrassatis, baud distincte clavatis, baud aut 

 demum leviter fistulosus, hypothallo radiciformi baud distincto aut (in 

 exs. Desmaz.) parum evoluto, aut in v. hypomelaena bene evoluto, 

 superne crebre caesio-pruinosus, baud rimulosus. Apothecia late 

 adnata, basi baud aut leviter constricta, mediocria, plana aut rarius 

 demum depresso-convexa, caesio-pruinosa. Hypothecium superne di- 

 lute rubricosum. Sporae fusiformes, 1-septatae. 



Distr. Praesertim ad detritum locis calcariis in regionibus alpinis 

 crescit. In Fennia nondum est coUectum, sed e pluribus locis in Suecia 

 et Norvegia indicatur. 



Specimen Acharianum (rite determinatum ex Helvetia) hie de- 

 scribimus. Thallus squamis circ. 2 — 7 mm latis, saepe confluenti- 

 bus, lobis circ. 1.5 — 0.? mm latis. Apothecia lat. 1 — 2.5 mm, margine 

 modice incrassato, leviter aut baud prominente, subpersistente, prui- 

 noso. Perithecium extus violascens, intus pallidum, ex hyphis forma- 

 tum radiantibus, conglutinatis, membranis modice incrassatis, cavitatibus 

 tenuibus. Hypothecium superne dilute rubricosum et ex hyphis erectis 

 formatum, inferne pallidum et ex hyphis irregulariter contextis, con- 

 glutinatis, modice pachydermaticis formatum. Hymenium crass. O.oeo mm, 

 jodo caerulescens. Epithecium violascens, KHO pulchrius violascens 

 (sicut etiam aliae partes rubricosae violascentesve apothecii reagunt). 

 Paraphyses sat arete cohaerentes, simplices, crass. O.oois mm, apice 

 0.003 mm. Sporae 8:nae, distichae, fusiformes, apicibus sat acutis, 

 1-septatae, long. circ. O.oie, crass. O.oos mm, sec. Hepp Flecht. Eur. (1853) 

 tab. XV n. 124 „long. O.ois— O.0027 mm". 



Obs. 1. Lecidea Candida Ach. sec. herb. Ach. spectat ad Th. 

 candidum (Web.) ex Anglia, Hispania, Suecia, Th. mammillare e Gallia 

 et Hispania et Th. toninianum Mass. ex Helvetia. 



