358 Transactions. — Botany. 



G. Lecidea fusco-lutea, Dickson. 



Tludlus albus, granulosus. Apothecia magna, sordide lutca vel liventia, 

 plana, prominente marginata. Ascis unani sporam oblongam grandissimam 

 minutissime muricatam foventibus. 



Thallus white, granular. Apothecia large, dull yellow or liver-coloured, 

 disk flat with a prominent margin. Asci with one large muricated spore, 

 0-188 millim. long, 0*052 millim. thick. 



The Lecidea fiLsco-lutea of Acharius has bilocular spores, the cells connected 

 by a tube. See Schoerer Exs. 215 (L. ferruginea b. leucorrhoea). 



7. Lecidea leiccojylaca, Chev. 



Thallus cinereo-virescens, effusus, granulatus vel granulato-rugosus. 

 AiMhecia exserta, disco piano et margine prominente, stratum hypothecii 

 subhymeniale et stratum excipulare nigra, lineo ochro-fusco disjuncta. Sporce 

 8n?e, incolores, ellipsoidese, biloculares, longit. 0*025 mm., crassit. 0*012 mm. 



Syn. L. pi^emneay Fries. L. grossa, Nyl. (in litt.) L. macidosa, Stirton 

 Z. melastegia, Nyl. L. mektclina, Nyl. Leighton Exs. 125 ! 90 ! 



Ad cortices arborum. 



Thallus ashy-green, efi*use, granular or granulo-rugose. Apothecia exserted, 

 with flat disk and prominent margin, the subhymeneal stratum of hyj^)othecium 

 and excipular stratum black and separated by a yellowish-brown line. Spores 

 8 in each ascus, colourless, ellipsoid, bilocular, 0*025 millim. long, 0*012 

 millim. thick. 



I have examined specimens in Mr. Buchanan's collection — whence Dr. 

 Stirton's lichens were obtained — and find no diflerence between L. fnacidosa, 

 Stirt., and L. leucoplaca, Chev. The measurements of the spores given by 

 Dr. Stirfcon would answer for L. parasema^ Nyl. Lich. Scand. 



8. Lecidea versicolor^ Fee, var. suhtid}ercidosa, Knight. 



Thallus subtuberculosus, pallido-stramineus. Apothecia sparsa, fusca, 

 marginata, margine concolore. Sp)orai pallido-lutese, uniseptatae, ovatse, longit. 

 0*038 mm., crassit. 0*024 mm. Hypothecium pallido-flavidum. 



Ad cortices. 



Thallus subtuberculose, pale straw. Apothecia scattered, brown, mar- 

 gined ; margin concolorous. Spores pale yellow, 1-septate, ovate, 0*038 millim. 

 long, 0*024 millim. thick. Hypothecium pale yellow. 



On bark of trees. 



It is not unlikely that L. taitensiSf Mont., and L. v&i'sicolor^ Fee, are the 

 same plant. If so the varieties in New Zealand are (1) Z. taitensis with rugose 

 thallus, and spores 075 mm. in length, and margin of apothecium much 

 darker than the ashy-brown disk; (2) L. versicolor with pale border and brown 

 disk, spores '05 mm. in length, hypothecium white, and thallus tuberouloso- 



