84 E. A. Vainio. Pyrenocarpeae. 



tenui. Pars gonidiis destituta strati medullaris valde tenuis, sub- 

 plectenparenchymatica, cellulis interstitiis disjunctis. 



5. E. pulvinatum Th. Fr. 



Lich. Arct. (1860) p. 257, Lich. Spitsb. (1867) p. 47; Vain. Lich. 

 Exp. Amdrup (Meddel. om Gronland XXX, 1905) p. 140. Dermatocarpon 

 pulvinatum Koerb. Parerg. Lich. 4 Lief. (1863) p. 308; Winter Ueb. 

 Sphaeromph. (1875) p. 273, tab. XVII f. 7, tab. XIX f. 15 k; Vain. Adj. 

 Lich. Lapp. II (1883) p. 166. Verrucaria pulvinata Nyl. in Stizenb. Lich. 

 Hyperb. (1878) p. 52. Leightonia pusilla A. adscendens Garov. et Gib. 

 De Lich. Endocarp. (1872) p. 286 p. p. 



Thallus polyphyllus, subfoliaceus aut squamosus, squa- 

 mis adscendentibus aut suberectis, angustis, irregulariter 

 sublinearibus, laciniatis vel lobulatis crenatisve, caespitoso- 

 confertis, superne et inferne cervinis aut fusco-nigricantibus 

 aut subtus vel basin versus pallidioribus, opacis, basi sub- 

 strato affixus, rhizinis destitutus. Apothecia thallo aut tu- 

 berculis thallinis immersa, vertice prominente et verrucu- 

 lam circ. 0.2 mm latam nigricantem formante. Perithecium 

 apice obscuratum, ceterum decoloratum pallidumve. Goni- 

 dia hymenialia ellipsoidea aut oblonga. Sporae binae, ob- 

 scuratae. 



Distr. In rupibus littoralibus haud inundatis locis cal- 

 cariis cum Placodio murorum ad Kitkajoki et in Ruskea- 

 kallio ad Paanajarvi in Kuusamo (F. Silen). 



Thallus long. 6 — 0.7 mm, laciniis lat. 1 — 0.3 mm, saepe 

 longitudinaliter subcostatus rugosusve, interdum tubiformi-convo- 

 lutus, humidus crass. O.iso— O.220 mm. Hypothallus tenuis, nigri- 

 cans, in substrate- effusus, primum distinctus. Gelatina hymenialis 

 jodo caerulescens, metaplasmate ascorum saepe rubescente. Peri- 

 physes bene evolutae, increbre septatae. Paraphyses in gelatinam 

 diffluxae. Gonidia hymenialia oblonga aut ellipsoidea, long. O.012 — 

 O.008, crass. O.0045 — O.004 mm, interdum long. O.004 et crass. O.0025 

 mm, stichococcoidea. Sporae demum fuscescentes, oblongae ellip- 

 soideaeve, murali-divisae, long. O.035 — O.053, crass. O.014 — O.026 mm, 

 sec. annot. Nyl. „long. O.037 — O.oes" mm, sec. Th. Fr. 1. c. p. 258 

 „long. 0.048 — 0.060, crass. O.ois — O.030 mm". Stratum corticate 

 superius et inferius crass. O.030 — O.040 mm, plectenparenchymati- 

 cum, cavitatibus cellularum O.oos — O.005 mm latis, membranis 

 modice incrassatis. Stratum medullare hyphis O.003 — O.002 mm 



