110 Acta Societatis pro Fauna et Flora Fennica IV. 



Obs. 2, Cladonia macilenta var. pulchella Miill. Arg. in Fla- 

 gey FL Lich. Franch.-Gomt. (1884) p. 124 (Flagey, Lich. de Fran- 

 che-Comte, 1882, n. 7) his notis describitur: „Thallus parum evo- 

 lutus. Podetia elongata, longitudine usque ad 40 millim., basi et 

 scyphis squamosis, saepe apice bifurcata; scyphi parum evoluti, 

 apotheciis tuberculosis et confluentibus terminati. Lecta in Jura." 

 Forsan ad /5. squamigeram Wain, pertinet (conf. quoque Sti- 

 zenb., Lich. Helv. 1882 p. 40). — An etiam CI. macilenta var. 

 pidchella (Schwein.) Miill. Arg., Fl. 1884 p. 619, in Madagascaria 

 ab Hildebrandt lecta, hue pertineat, ignoramus. Conf. Cl.imlchel- 

 lam Schwein. sub CI. didyma. Quoque in Oliv. Etud. Clad. (1885) 

 p. 228 commemorata est. 



Obs. 3. Cladonia macilenta f. densiflora Del. in herb. (Arn., 

 Fl. 1884 p. 79) his verbis describitur: „Apothecia aggregata, inter- 

 mixtis phyllt)cladiis." Vix a /i. squamigera Wain distinguenda sit. 



*;.. Ostreata NyJ 



Diagn. Thallus primarius squamis subintegris. Pode- 

 tia brevissima, decorticata, dense sorediosa, esquamulosa. 



Syn. Cladouia macilenta v. ostreatg Nyl., Herb. Lich. Par. (1855) 

 11. 108, Enum. Gen. Lich. (1857) p. 97, Syn. Lich. (1860) p. 225. — Lamy, 

 Suppl. Cat. Lich. Mont-Dor. (1882) p. 7. 



Cladonia Floerkeana var. ostreata Leight., Not. Lichenol XI (1866) 

 p. 417. 



Exs. Nyl., Herb. Lich. Par. (1855) n. 108 in mus. Paris, 

 et herb. D.C. 



Descr. Thallus primarius persistens, squamis minutis, 

 circiter 1 millim. longis latisque, subintegris, adscendentibus, saepe 

 subimbricatis confertisque, baud raro semirotundatis, superne sub- 

 albidis vel pallescenti-albidis, subtus albidis, infra et saepe mar- 

 gine sorediosis (facie externa thallo Lecideae ostreatae simillima). 

 Podetia parcissime evoluta, brevissima, circiter 1 millim. longa, 

 subcylindrica, ascypha, simplicia, apice obtuso, esquamulosa, so- 

 rediosa, subalbida (hydrate kaUco lutescentia). Apothecia solum 

 juveniUa visa, coccinea. 



