Lobaria. 201 



non reagens. Stratum corticale siqwrius circ. 0,0 3 — 0,0 3 5 mil- 

 lim. crassum, series circ. 4 (—5) cellularum continens, grosse pa- 

 renchymaticum, cellulis summis minutis. Stratum corticale infe- 

 rius e seriebus 2—1 cellularum formatum. Gonidia flavo-vire- 

 scentia, globosa, simplicia, diam. 0,oo8— 0,0 4 millim., membrana 

 sat tenui. Rhizinae ex hyphis formatae fasciculatis, maxima parte 

 cohaerentibus, ramulosis, cellulis apicalibus hypharum (ramulo- 

 rumque) brevibus constrictisque, reliquis oblongis. 



Trib. 9. Paimarieae. 



Thallus squamosus aut minute foliaceus, heteromericus, rhi- 

 zinis aut hypothallo vulgo instructus. Stratum corticale super his 

 pseudoparenchymaticum, loculis cellularum majusculis mediocri- 

 busve. Stratum medullare stuppeum, hyphis leptodermaticis. 

 Gonidia in zona infra stratum corticale disposita, scytonemea aut 

 polycoccoideo-nostocacea aut palmellacea. Apothecia peltata ba- 

 sique excipuli constricta, aut basi tota adnata, gonidia continentia 

 aut gonidiis destituta. Excipulum saltern parte exteriore pseudo- 

 parenchymaticum. Paraphyses bene evolutae, haud ramoso-con- 

 nexae. Sporae breves, oblongae aut oblongo-fusiformes aut elli- 

 psoideae globosaeve, decolores, simplices aut raro 1-septatae (in 

 Massalongia Koerb.). Sterigmata (quantum cognitum) crebre 

 articulata. 



1. Erioderma. 



Fee, Ess. Crypt. Ecorc. (1824) p. 115; Tack., Gen. Lich. (1872) p. 39; 

 Nyl., Obs. Pyr. Or. (Fl. 1873) p. 56; Tuck., Syn. North Am. (1882) p. 110; 

 Nyl., Syn. Lich. II (1885) p. 46. 



TJiallus foliaceus, adscendens, superne villosus et strato cor- 

 ticali obductus, subtus aut margine rhizinis instructus et strato 

 corticali destitutus, inferne saepe etiam nervosus. Stratum corti- 

 cate ex hyphis verticalibus parenchymatice septatis conglutinatis 

 formatum, series cellularum plures irregulariter horizontales conti- 

 nens, loculis majusculis, parietibus leviter incrassatis aut sat crassis. 

 Stratum medullare stuppeum, hyphis sat laxe contextis, crassi- 

 tudine mediocribus (circ. 0,oo4— 0,0 3 millim. crassis), leptoder- 

 maticis, parce septatis. Gonidia scytonemea (Bornet, Rech. Gon. 



