Chiodecton. 137 



cium integrum, fuligineum, labiis primum conniventibus et demum 

 hiantibus. Discus primum rimaeformis, demum dilatatus, conca- 

 vus aut planiusculus, nigricans, epruinosus. Sporae obscuratae, 

 5 (—6) -septatae, long. 0,oi5— 0,0 21, crass. 0,00 6 5— 0,008 millim. 

 Ad corticem arboris prope Sitio (1000 metr. s. m.) in civ. 

 Minarum, n. 901. — Thallns leviter inaequalis aut passim parce 

 granulosus, opacus. Gonidia chroolepoidea. Apothecia opaca. 

 Hypotliecium subhymeniale sat tenue, pallido-fuscescens. Hyme- 

 nium circ. 0,ogo— 0,0 5 millim. crassum, jodo vinose rubens (hy- 

 potliecium subhymeniale primum dilute caerulescens, demum vi- 

 nose rubens). Paraphyses 0,ooi5 millim. crassae, apice baud 

 incrassatae, ramoso-connexae. Asci obovoidei, membrana tota 

 leviter incrassata. Sporae 8:nae, primum decolores, dein mox 

 bene obscuratae, oblongo-ovoideae, apicibus rotundatis, pariete 

 leviter incrassato, halone nullo indutae, cellulis brevioribus, quam 

 latis, loculis subcylindricis aut demum fere lenticularibus. 



5. Chiodecton. 



Ach., Syn. Lich. (1814) p. 108 (emend.), Glyph, et Chiod. (Trans. Linn. 

 Soc. XII, 1815—1818) p. 43 (em.); Fee, Mon. Chiod. 1829 (em.); Tul., Mem. 

 Lich. II (1852) p. 208, tab. 10 fig. 24-27 (em.); Mass., Ric. Lich. Crost. 

 (1852) p. 149 (em.); Nyl., Ess. Nouv. Classif. Lich. (1855) p. 190 (em..); Mass., 

 Esam. Comp. (1860) p. 43 (em.); Th. Fr., Gen. Heterolich. (1861) p. 96 (em.); 

 Tuck., Gen. Lich. (1872) p. 212 (em.); Bornet, Rech. Gon. Lich. (1873) p. 16. 

 tab. 8 fig. 1; Leight, Lich. Great Brit. 3 ed. (1879) p. 435 (em.); Nyl. in Hue 

 Addend. (1888) p. 263 (em.). Stigmatidium, Meyer, Entw. Flecht. (1825) p. 

 328 (pr. p. et em.); Nyl., Ess. Nouv. Classif. Lich. (1855) p. 188 (em.). Flaty- 

 grapha Nyl., 1. c. (em.). 



Th alius crustaceus, uniformis, hypothallo aut hyphis medul- 

 laribus substrato affixus, rhizinis et strato corticali destitutus. 

 Stratum medullar e stuppeum, hyphis intricatis, tenuibus, lepto- 

 dermaticis. Gonidia flavovirescentia, chroolepoidea, cellulis mi- 

 nutis, anguloso-globosis aut ellipsoideis aut oblongis, saltern pri- 

 mum concatenatis, filamenta ramosa formantibus, demum saepe 

 pro parte etiam liberis, membrana vulgo sat tenui instructis, aut 

 simplicia, globosa, magna (diam. circ. 0,020— 0,0 3 millim.), pa- 

 chydermatica [in subg. Schismatomma (Flot. et Koerb.) Wai- 

 nio], aut phycopeltidea, cellulis concatenatis et in membranam 

 connatis [in subg. Manzosia (Mass).]. Apothecia thallo innata 



