4 MEMOIRES DE L HERBIER BOISSIER. 



lutescens. Habitu similis P. flavido-glaucœ Wain., Etud. Lieh. Brés. I, p. 6S, at 

 réactions ab ea differens. 



P. pruinata Müll. Arg., 1. c. (i883) ii. o72. Apothecia disco tenuiter prui- 

 noso. ïhallus laciaiis sicut in P. sublœvigata (Wain., Etud. Lieh. Brés. I, p. 53), 

 K HO superne lutescens, intus non reagens, CaCl2 02 intus rubescens (leviter). 



P. subcoronata Müll. Arg., Rev. Lieh. Féean. (1887) p. il. Subsimilis 

 P. coronatœ Fée, sed thallo paullo majore, isidiis [destituto et medulla passim 

 rubra. 



P. brachyphylla Müll. Arg., Lieh. Beitr. (1886) n. 1013. Thallus K H 

 superne flaveseens, intus non reagens, Ca Cb O2 non reagens. Speciniina es Usam- 

 bara, citata in Lieh. Usamb. (1894) p. 2S7, hue non pertinent. 



P. lecanoracea Müll. Arg., Lieh. Beitr. (1888) u. 1387. Thallus areolato- 

 pruinosus, medulla passim albida, passim oehracea, K HO rubescente (etiam par- 

 tibus albis K HO rubescentibus). 



P. bicornuta Müll. Arg., 1. c. (1891) n. 1643. Medulla thalli KHO non 

 reagens, Ca C!2 O2 rubescens. 



P.fertilis Müll. Arg., 1. c. (1887) n. 1143, sit lusus fertilis P. sulcatœ, a qua 

 thallo glauco-pallescente crebre fertili differt. Medulla thalli KHO lutescens et 

 dein rubescens, Ca CI2 O2 non reagens. 



P. microsticta Müll. Arg., 1. c. (1879) n. 100, Thallus KHO superne leviter 

 flaveseens, intus non reagens, Ca CI2 O2 non reagens. 



P. Catharinensis Müll. Arg., Lieh. Cathar. (1891) p. 239, sporis paullo 

 majoribus difï'ert a P. inutata Wain., Etud. Lieh. Brés. I (1890), p. 39. Thallus 

 esorediatus, ciliis et isidiis destitutus, subtus fere usque ad marginem rhizinis 

 instructus, KHO superne lutescens, intus lutescens et demum rubescens, CaCbOz 

 non reagens. 



P. Andreana Müll. Arg., Lieh. Neo-Grenad. (1879) p. 13. Thallus superne 

 flaveseens, sorediosus, subtus ad ambitum late nudus, KHO neque superne, nee 

 intus reagens, Ca CI2 O2 intus rubescens. 



P. BoUiana Müll. Arg., Lieh. Beitr. (1875) n. 45. Thallus KHO superne 

 flaveseens, intus non reagens, Ca CI2 O2 non reagens. 



P. sphasrosporella Müll. Arg., 1. c. (1891) n. 1650. Thallus ambitu irre- 

 gulari, sicut in P. homotoma Nyl., KHO neque superne, nee intus reagens, 

 Ca CI2 O2 non reagens. 



P. Arechavaletae Müll. Arg., Lieh. Montevid. (1888) p. 1. Thallus superne 

 glaueescens, intus stramineus, lobis rotundatis, ciliatis, subtus fere usque ad 

 ambitum rhizinis instructus, KHO superne fulvescens, intus lutescens, Ca CI2O2 

 non reagens. In speeimine originali hujus speeiei Stratum corticale thalli maxima 

 parte inseetis depastum est, quare thallus « Isete flavicans» videtur. 



P. caperata v. glaucopis Müll. Arg., Lieh. Usamb. (1894) p. 258, auto- 

 noma est species, quae nominetur P. glaucopis. Thallus superne flavescenti- 

 stramineus, esorediatus, isidiis destitutus, centrum versus rugosus, laciniarum 



