Buellia] I. DiscoLiCHENEs (Wainio). 415 



F. subtilis Wain. 



Thallus albidus, KHO leviter flavescens, areolis O'l ad 0-2 mm. 

 latis. Apothecia O'l ad 02 mm. lata. Hypothecium fusco- 

 fuligineum. Sporae long. 0'009 ad 0-008, crass. 005 mm. 

 Hypothallus nigricans ad ambitum distinctus. Apotheciis et 

 areolis thalli minoribus a typo differt, et a B. punctiformi f. 

 stigtnatea fere solum reactione distinguitur. 



PuNKO Andongo.— Ad rupes et lapides in summo monte Pedra de 

 Cazella. No. 64 pr. p. 



10. B. depressa Wain., sp. n. 



Thallus crustaceus, uniformis, sat tenuis, areolatus, cinereus, 

 KHO non reagens, areolis O'l ad 0-25 mm. latis, angulosis, planis, 

 ■contiguis, fissuris nigro-limitatis, medulla jodo non reagente, 

 hypothallo nigricante. Apothecia 0'2 ad 0-15 mm. lata, thallo 

 immersa, humida fusca, sicca nigra, nuda, opaca, plana, immar- 

 ginata aut margine tenuissimo nigricante. Hypothecium albidum. 

 Excipuhim proprium basi albidum, latere fusco-fuligineum tenue 

 aut partim indistinctum. Epithecium fuscescens, KHO non 

 reagens. Sporse 8nse, distichse, fuscse, l-septatse, long. O'OOS ad 

 0-011, crass. 0-006 ad 0-007 mm. 



PuNGO Andongo. — Ad lapides quartzosos in monte Pi-sesidii. 

 No. 61 pr. p. Ad rupes et lapides gneissaceas in summo monte Pedra 

 de Cazella (2400 ad 3800 ped. s. m.). Nos. 64 pr. p., 480 pr. p., 481 pr. p. 



Ad species inter Buellias et Binodinas intermedias pertinet. Habitu 

 iere similia est LecanoroR {Aspiciliw') gibbosce, sed minor. 



11. B. recepta (Krempelh.) Miill. Avg., Lich. Afr. Occ. (Linnsea 

 1880), p. 36. Lecidea Krempelh., Fl. 1876, p. 318. 



Ad lapides prope Pungo Andongo leg. Soyaux teste Miill. 

 Arg., I.e. 



12. B. Afra (Stizenb.). 



Lecidea Afra Stizenb., Lich. Afr. II. p. 175. Buellia Africana 

 MuU. Arg., Lich. Beitr. (1879), n. 123, baud Lecidea {Buellia) 

 Africana Tuck, in Proceed. Am. Acad, of Arts and Sciences, 

 1860, p. 406. 



Ad lapides prope Pungo Andongo leg. Soyaux teste Mull. Arg., 

 Lich. Afr. Occ. (Linnsea 1880), p. 36. 



13. B. spuria (Schser.) Arn., Fl. 1872, p. 291 ; Th. Fr., Lich. 

 Scand. p. 605 ; Wain., Etud. Lich. Br^s. I. p. 177. 



Var. ferruginea Wain. 



Thallus ochraceo-pallidu^s aut partim etiam albidus, hydrate 

 kalico solutionem luteam effundens, areolatus aut rimosus, Isevi- 

 gatus, hypothallo nigricante interdum inter areolas conspicuo, 

 medulla jodo bene cserulescente. Apothecia thallo immersa aut 

 areolis immixta, thallum subsequantia aut demum leviter super- 

 antia, vulgo planiuscula, margine tenui aut evanescente. Hypo- 

 thecium fuscum. Epithecium fuscescens. Hymenium jodo 

 persistenter cserulescens. Sporse 8n8e, distichse, long, 0-010 ad 

 0-012, crass. 0-006 ad 0-007 mm. 



