E. WAINIO, LICHENES PROPE PITLEKAI COLLECT!. 25 



millim. latis, iteratim dicliotome ramosis, ramis patentibua, 

 siiperne concavis et fusco-nigricantibus, leviter nitidis, subtus 

 nigricantibus, rugulosis, nudis, ciliis marginalibus parcissimis, 

 pycnoconidangiis marginalibus sat parcis, elvatis; medulla 

 KHO lutescens. — Platysma polyschizum Nyl., Fl. 1862 p. 82, 

 Fl. 1869 p. 442 {Cetraria Fahlunensis ß. polyschiza Th. Fr., 

 Lieh. Spitsb., 1867, p. 11, Lieh. Scand., 1871, p. 108), secun- 

 dum specimen orig. (n. 36106 in herb. Nyl.), a Nyl. false de- 

 scriptum, revera medullam KHO lutescentem habet et 

 forma est intermedia inter var. linearem Wain, et var. majorem 

 Schaer., etiam pycnoconidiis cum hac specie congruens, at spe- 

 cimen a eel. Crombie missum (n. 36107 in herb. Nyl.) ad Ce- 

 trariam Fahlunensem (L.) Wain. ( = Platysma commixtimi Nyl.) 

 pertinet, medulla KHO non reagente (e tribus locis a eel. 

 Crombie, Brit. Lieh., 1894, p. 223, indicatur). PI. Fahlunense 

 *stygioi(les Nyl. apud Kihlm., Neue Beitr. Flecht. Kola (1891) 

 p. 50, est variatio insignis, habitu Pa)'meliae alpicolaeTh. Fr., 

 at rhizinis parcis marginalibus instructa (secund. specim. orig. 

 in herb. Nyl.). Var. linearis habitu omnino similis est C. 

 nigricanti Nyl., at marginibus thalli haud spinuloso-denticula- 

 tis, rhizinis fere destitutis, et medulla jodo non reagente ab 

 ea differens. 



Ad saxa in peninsula Jinretlen. Ad saxa et inter Parme- 

 liam saxatilem supra saxa in regione orientem versus a sinu 

 Koljutschin sita. Ster. 



5. C. tenuissima (L.) Wain., Not. Syn. Lieh. (Med- 

 del. Soc. Faun. Fl. Fenn. XIV, 1886) p. 21. Lichen I slandicus 

 '(. tenuissimus L., Spec. Plant. (1753) p. 1145 (excl. syn.). 

 Lichen aculeatus Schreb., Fl. Lips. (1771) p. 125. Cornicularia 

 aculeata Ach., Meth. Lieh. (1803) p. 302; Koerb., Syst. Germ. 

 (1855) p. 8; Th. Fr., Lieh. Aret. (1860) p. 30, Lieh. Spitsb. 

 (1867)p. 10; Hesse, Journ. Prakt. Ch em.. Neue Folge, 65 (1902) 

 p. 550, 73 (1906) p. 133. Cetraria Fr., Syst. Orb. Veg. (1825) 

 p. 239; Nyl., Syn. Lieh. (1858—60) p. 300, Lieh. Scand. (1861) 

 p. 79. Enum. Lieh. Fret. Behr. (1888) p. 61; Th. Fr., Lieh. 

 Scand. (1871) p. 101; Almqu., Lieh. laktt. Sib. (1879) p. 37, 

 41, 46, Lieh. Kust. Beringsm. (1887) p. 528; Tuck., Syn. North 

 Am. Lieh. (1882) p. 29; Hue, Lieh. Extr.-Eur. (1901) p. 83; 

 Zopf, Zur Kenntn. Flechtenst. XII (1904) p. 65. C. stuppea 

 (Fw.) Zopf., 1. c. (1904) p. 64. 



Medulla thalli stuppea, ex hyphis laxe contextis formata. 



