26 £. A. Vainio, Lecideales. 



straminea, KHO non reagentia. Conidangia nucleo dilute 

 coccineo (acidum rhodocladonicum continentia). 



Distr. Locis similibus, ac species praecedentes, crescit, 

 frequenter adhuc in provinciis meridionalibus Fenniae et 

 frequentissime atque abundantissime in Lapponia prove- 

 niens. 



Thallus primarius raro evolutus, crustaceus, tenuis, e ver- 

 rncis constans O.ieo — O.280 mm latis, stramineis, strato corticali 

 destitutis. Podetia long. circ. 5 — 20 centim., crass. O.5 — 2.5 mm, 

 subcylindrica, ascypha, ramosissima, raro parcissimeque sub- 

 dichotome ramosa, abundanter radiato-ramosa, tenuiter sub- 

 arachnoideo-tomentosa. Apothecia lat. O.3 — O.5 mm. Sporae 

 fusiformes oblongaeve, long. O.oio — O.ou ( — O.ooe) mm, crass. 

 0.003 — 0.0035 ( — 0.002) mm. Conidangia in apicibus ramulorum 

 solitaria aut parcius aggregata, lat. O.uo — O.ooo mm. Conidia 

 subcylindrica, leviter curvata aut parcius rectiuscula, long. 

 0.005 — 0.006 (0.004 — O.oos), crass. O.oois mm. Podetia KHO cum 

 CaCl202 lutescentia, acid, laevo-usninicum et saccharum, at nullam 

 mat. amaram continentia sec. Zopf Flechtenst. p. 405, 431. 



F. spumosa Norrl. Vain. 1. c. I p. 46, II p. 464, III p. 223 {Cladina 

 sylvatica f. spumosa Nyl. in Norrl. et Nyl. Herb. Lich. Fenn. IX, 1882, 

 p. 46), e parasitis paulum morbosa, podetiis tomento subarachnoideo 

 abundantius evoluto, irregulariter radiatis aut partim dichotome ramosis. 



Subg. 2. Pycnothelia Ach. 



Vain. Mon. Clad. I (1887) p. 47, III (1897) p. 224. Cenomyce + 

 Pycnothelia Ach. Lich. Univ. (1810) p. 571. Pycnothelia Duf. Rev. Clad. 

 (1817) p. 5; Nyl. Fl. 1866 p. 179. 



Hypothallus effusus. Thallus primarius crustaceus, e 



verrucis constans strato corticali destitutis, diu persistens. 



Podetia basi subpersistentia, apice baud diu accrescentia, 



brevia aut abortiva, ascypha, simplicia aut ramosa, glabra, 



strato corticali nullo distinct©, strato chondroideo plus 



minus evoluto. Apothecia parva, aggregata, subpeltata. 



Sporae primum simplices, demum 1 — 3-septatae. 



Cl. apoda Nyl. Fl. 1878 p. 241 (Vain. 1. c. I p. 57) sec. herb. Nyl. 

 est forma Cl. papillariae, analoga f. pycnothelizae Cl. fimbriatae, apotheciis 

 sessilibus, thallo affixis et e latere podetii vetusti excrescentibus, 

 passim etiam podetiis brevibus sterilibus instructa, disco ferrugineo- 

 rufescente, KHO solutionem rufescentem effundente et crystalla aci- 



