Placodium. 123 



(Tuck., Obs. Am. Lich. 1862 p. 402), quod item disco distinctius 

 rubro et margine thallode minute crenulato ab eo differt. — 

 Thallus KHO non reagens, hypothallo caeruleo-nigricante passim 

 conspicuo, in parte interiore ex hyphis formatus parenchymatice 

 septatis, membrana tenui instructis, extus hyphis tenuiter obductus 

 irregulariter contextis, partim conglutinatis, cellulis vulgo elongatis. 

 Apothecia 2—0,8 millim. lata, disco piano aut interdum convexo, 

 margine thallode integro aut flexuoso. Excipulum extus KHO le- 

 viter violascens, hyphis parenchymatice septatis, constrictis, in 

 parte tenui exteriore conglutinatis. Hymcniam 0,o$o — 0,0 8 millim. 

 crassum, joclo persistent er caerulescens. Paraphyses O.oois mil- 

 lim. crassae, apice clavatae (0,0 3 — 0,002 millim.), gelatinam sat 

 firmam, haud abunclantem percurrentes, praesertim apicem versus 

 ramosae, aliae simplices, non aut apice parce constricte articu- 

 latae. Asci sicut in var. praecedente. Sporae ellipsoideae, apiei- 

 bus obtusis, long. 0,oi5 — 0,0 1 3, crass. 0,oo9— O.oos millim. 



7. PI. subcerilium (Nyl.) Wainio. Lecanora erythroleucd var. 

 subcerina Nyl., Fl. 1869 p. 119, Krempelh., Fl. 1876 p. 173 (haud 

 L. subcerina Nyl., Fl. 1876 p. 282). Callopisma australe Mull. Arg., 

 Lich. Beitr. (Fl. 1881) p. 249. 



Thallus crustaceus, tenuis, effusus, subcontinuus, rugulosus 

 aut verruculoso-rugulosus, cinereo-albicans, esorediatus. Apothe- 

 cia mediocria, 2—1 millim. lata, demum subpeltata, thallo ad- 

 pressa, disco piano, sordide cerino-aurantiaco aut cerino-fulve- 

 scente [pulchre aurantiaco in var. aurantiaca Mull. Arg., 1. a], 

 margine thallode persistente, crassiusculo aut sat tenui, thallo 

 concolore aut albido-flavicante, integro aut flexuoso [aut minute 

 crenulata in var. crenulata Mull. Arg., L. B. n. 332]. Sporae 

 8:nae, oblongae aut ellipsoideae, 3-loculares, long. O.025 — 0,019 

 (raro 0,015), crass. O.011— 0,oio [„— 0,0 13"] millim. 



Ad corticem arborum prope Sepitiba in civ. Bio de Janeiro, 

 n. 462, 505. — Habitu PL gilvo (Hoffm.) subsimile est. Thallus 

 KHO non reagens, hypothallo indistincto. Apothecia margine 

 thallode primum leviter elevato, demum discum aequante, mar- 

 gine proprio spurio in nonnullis apotheciis conspicuo, tenuissimo, 

 textura thalamio consimili. Excipidum thallodes gonidia conti- 

 nens. Hypothecium fere albidum. Hymenium circ. 0,i6 — 0,120 

 millim. crassum, joclo persistenter caerulescens. Epithecium ful- 



