Lecidea. 25 



dein vinose rubens. ParapJiyses sat parcae, 0,ooo5 millim. cras- 

 sae, apice leviter aut parum inerassatae, gelatinam sat abundan- 

 tem percurrentes, parce ramoso-connexae, haud constrictae (in 

 KHO et H 2 S0 4 ). Asci clavati, circ. 0,oio — 0,012 millim. crassi. 

 Sporae distichae, apicibus rotundatis obtusisve, nonnullae raro 

 fortuito 4-septatae, halone nullo. 



Subg. V. Lopadium (Koerb.) Wainio. TJialhis crustaceus, 

 uniformis. Sporae murales, clecolores aut pallidae, magnae, ha- 

 lone nullo indutae. 



Lopadium Koerb., Syst. Germ. (1855) p. 210; Th. Fr., Lick. Scand. 

 (1874) p. 388; Mull. Arg., Lich. Beitr. (Fl. 1881) n. 268 (emend.). Heterothe- 

 cium ****Lopadium Tuck., Syn. North Am. II (1888) p. 57. 



1. Gymnothecium Wainio. Epithecium gonidiis hymeniali- 

 bus destitutum. 



24. L. leilCOZantha (Spreng.) Nyl., Enum. Gen. Lich. (1857) 

 p. 123 (excl. var.); Krempelb., Lich. "Bras. Warm. (1873) p. 25, 

 Fl. 1876 p. 268. Heterothechim leucoxanthum Mass., Misc. Lichenol. 

 (1856) p. 39, Esam. Comp. Lich. (1860) p. 17; Mull. Arg., Lich. 

 Beitr. (Fl. 1881) n. 260; Tuck., Syn. North Am. II (1888) p. 58. 



TJiallus crustaceus, subcontinuus, verruculoso-inaequalis, 

 crassitudine mediocris aut sat tenuis, albidus aut stramineo-glau- 

 cescens. Apothecia circ. 1,8 — 0,8 millim. lata, disco piano, ochra- 

 ceo-fulvescente aut ochraceo-nigricante, margine crassiusculo aut 

 mediocri, ochraceo aut fulvescente, persistente. Hypothecium 

 pallidum [aut rufofuscens: Tuck., 1. c.]. Sporae solitariae, oblon- 

 gae, murales, long. circ. 0,0 9 4 — 0,0 5 2, crass. 0,0 3 6 — 0,020 millim. 



Ad corticem arborum passim obvia, n. 302, 321, 691, 738, 

 762, 809, 835. — Thallus esorediatus, hypothallo cinereo aut 

 nigricante interdum partim limitatus. Gonidia protococcoidea. 

 Apothecia adpressa. Excipulum proprium, gonidiis destitutum, 

 strato myelohyphico, aerem continente, albido, infra hypothecium 

 sito, in margine et basi apothecii chondroideum et ex hyphis 

 radiantibus, conglutinatis lormatum, fulvescens. Hymenium circ. 

 0,i3 0—0,no millim. crassum, jodo persistenter caerulescens. Epi- 

 thecium fulvescens, KHO solutionem violaceam effundens. Para- 

 physes sat laxe cohaerentes, 0,0015 millim. crassae, apice haud 



