126 E. A. Vainio, Lecideales. 



1. P. cereolus (Ach.) Nyl. 



in Stizenb. Ind. Lich. Hyperb. (1876) p. 10. Lichen {Isidium) 

 cereolus Ach. Lich. Suec. Prodr. (1798) p. 89. Stereocaulon Ach. Meth. 

 Lich. (1803) p. 316, tab. 7 f. 2, Lich. Univ. (1810) p. 582; Floerk. Deutsch. 

 Lich. IV (1819) p. 14. Pilophorus robustus *P. cereolus Th. Fr. Lich. 

 Scand. I (1870) p. 55; Forssell Stud. Cephalod. (1883) p. 76. Pilophorus 

 cereolus Arn. Lich. Tirol XXIII (1887) p. 83; Cromb. Mon. Brit. Lich. I 

 (1894) p. 114, fig. 32 a, b, c (Nyl. delin.); Lynge Norske Busk- Bladlaver 

 (1910) p. 44, Stud. Lich. Norw. (1921) p. 28. Stereocaulon cereolinum X 

 Cereolus Th. Fr. De Ster. Piloph. Comm. (1857) p. 19, Mon. Ster. (1858) 

 p. 40. Stereocaulon cereolinum Ach. Syn. Lich. (1814) p. 285 p. p. S^ 

 condensatum *St. cereolinum Nyl. Syn. Lich. (1860) p. 250 p. p., Lich. 

 Scand. (1861) p. 66 p. p. Pilophoron fibula Nyl. in Norrl. Bidr. Sydostr. 

 Tav. Fl. (1870) p. 176, Ber. Torn. Lappm. (1873) p. 321, cet; Vain. FL 

 Tav. Or. (1878) p. 96 (baud Tuck., conf. p. 128). 



Exs. Un. Itiner. (1867) n. 31 (sec. Arn. 1. c). — Arn. Lich. Exs. 

 (1880) n. 823, 868 (cum paras.), (1885) n. 1088. — Zwackh Lich. Exs. 

 (1883) n. 817, 818 (sec. Arn.). — Lojka Lich. Regn. Hung. IV (1884) n. 

 179. _ Norrl. et Nyl. Herb. Lich. Fenn. cont. (1921) n. 499, 500. 



Podetia brevia, simplicia aut raro apice parcissime 

 ramosa, sorediosa aut partim verrucis areolisve gonidia 

 continentibus obducta aut tota verrucosa, vulgo sterilia. 

 Apothecia basi abrupte constricta, latere leviter inflexo,. 

 nigra. Hymenium superius aeruginosum. 



Distr. Locis apricis aut subumbrosis ad rupes, sco- 

 pulos et saxa dioritica et granitica sat rare aut passim 

 in maxima parte territorii, septentrionem versus rarescens. 

 Lin: Muddusjarvi (F. Silen). LEnont.: „In declivo ferroso- 

 arenoso duro umbroso ad Peerakoski" (Norrl. Ber. Torn. 

 Lappm. p. 321), in reg. alpina mentis Leutsuvaara (Norrl. 

 1. c). LKem.: In reg. abietina montis Valivaara prope 

 Pallastunturi in Kittila (Norrl. 1. c), Pyhakuru in Kuolajarvi 

 (H. Lindberg). Kuus.: Paanajarvi (F. Silen), ibi etiam in 

 Vaskikallio (Vain.) et in reg. subalp. montium Mantytunturi 

 et livaara (Vain. Adj. Lich. Lapp. I p. 99). OKaj.: Nonnuliis 

 locis prope Kylmala in Kuhmo (Vain. 1. c). Kb.: Passim, 

 velut ad Vieki et Matovaara in par. Lieksa et ad Mujejarvi 

 et Nuottivaara in par. Nurmes (Vain. 1. c). Kar. Vien. occ: 

 Koroppi in Repola (Vain.). Tb.: Pihlajavesi (Norrl.). Sb.: 



