358 Transactions. — Botany. 



lea fusco-lutea, Dickson. 

 TJiallus albus, granulosus, Apothecia magna, sordide lutea vel liventia, 



plana, prominente marginata. 

 minutissime muricatam foventibus. 



grandissimam 



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. 



Lecidea f\ 



tube. 



ferruginea 

 7. Lecidea leucoplaca, Chev. 



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

 Apothecia exserta, disco piano et margine prominente, stratum hypothecii 

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

 8nse, incolores, ellipsoidese, biloculares, longit. 0*025 mm., crassit. 0-012 mm. 



Syn. L. premnea, Fries. L. grossa, Nyl. (in litt.) L. maculosa, Stirton 

 L. rnelastegia, Nyl. L. melaclina, Nyl. Leigh ton Exs. 125 ! 90 ! 



Ad cortices arborum. 



Thallus ashy-green, effuse, granular or granulo-rugose. Apothecia exserted, 



disk 



and 



8 in each ascus, colourless, ellipsoid, bilocular, 0-025 mil 



Spores 



illi 



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

 Stirton's lichens were obtained— and find no difference between L. maculosa, 

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

 Dr. Stirton would answer for L. parasema, Nyl. Lich. Scand. 



8. Lecidea versicolor, Fee, var. subhiberculosa, Knight. 

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

 marginata, margine concolore. Sporce pallido-lutese, uniseptatee, ovat», longit. 

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



Ad cortices. 



subtuberculose 



gined : margin 



Apothecia scattered, brown, mar- 

 Spores pale yellow, 1-septate, ovate, 0-038 millim. 



long, 0-024 millim. thick. Hypothecium 

 On bark of trees. 



It is not unlikely that L. taitensis, Mont., and L. versicolor, Fee, are the 

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

 tballus, and spores 0075 mm. in length, and margin of apothecium much 



disk, spores -05 mm. in length, hypothecium 



with pale border and brown 



