CRYPTOGAMIA, ALGAE. 1938. Lichen. 1785 



16. Shields thin, membranous, feffile, generally fiat, cl of eh attached by 

 their margins to the frond: frond leathery or membranous, moflly 

 with downy or fibrous veins underneath: the fertile-lobes hng f 

 afcending, and naked beneath. Peltidea. 



*venofus. Grey, white underneath with grey-brown downy veins: 

 lobes roundiih, divergent: fhields anterior, marginal, horizontal, 

 round, brown. E. Bot. 887, 



*fpurius. Expanded, digitate-lobed* cieereou^ naked whitifh with, 

 indiftincl veins beneath: fhields anterior, afcending, roundiih, 

 dark red brown. Eng. Pot, 1542. 



•caninus. Expanded, greyifh ; whiter with brownifli veins and 

 fibres beneath ; lobes oblong, large, broader outwards; fertile- 

 ones fcattered, marginal, narrow; fhields perpendicular, revolute, 

 roundiih, anterior^ t iwny^rufous. For. Dan. A 767* 2. 



hymeninus. Expanded, glabrous, glaucous-greenifh, with grey veins 

 and brown fibres beneath; lobes rounded cut-laciniate, the feg* 

 ments afcending flexuous-curled and bearing the fhields at the 

 margin: fhields anterior, nearly folitary* afcending, round, 

 rufous-brown. 



*rufescens\ Expanded, pale rufous, nearly veinlefs reticulate with 

 black and fibrous beneath; lobes deeply cnt, finuate, rounded, 

 inflected and curled at the margin, fertiJe-ones marginal fhorter; 

 fhields afcending, revolute, roundifh, anterior, black-brown. 

 Dill. t. 27- 103. 

 2. collinus, Brownifh-grey, with black downy veins beneath ; lobes 

 oblong, fmuate-lobed, fertile-ones marginal very fhort; fhields tranf* 

 verfely oblong, a little revolute, rufous-brown. 



* fcut'atus. Expanded, grey, naked and veinlefs beneath ; lobes 

 rounded, finuate-cut, curled at the margin: fhields marginal, 

 orbicular, afcending, anterior, pale rufous. 



*£olydaclylos. Expanded, glabrous, glaucous-greenifh, veined with 

 brown fibres beneath; lobes rounded, digitate, fertile-ones margi- 

 nal long crowded, taper: fhields anterior, roundifh, revolute* 

 afcending, biack-brown> Dill. 28. 107. 

 2, pellucidus. Membranous, nearly tranfparent. 4 fertile lobes moftly in pairs, 

 afcending. DilL 28. 108. 



thlorophyllus. Expanded, fmoothifb, palifh-white and veined beneath, 

 afcenoing and curled at the margin : ihields reddifh. 



*aphthofus. Expanded, glabrous, green wi'.h brown wart*, nearly 

 veinlefs with black fibres and a blueifh black ftripe b^ncad); lobes 

 lax, rounded, fertile-ones marginal fcattered narrow : fhields 

 anterior, afcending, round, red. Eng. Bot. t 1 119. 



*horizontalis. Expanded, glabrous, glaucous-g.cenifh, black-brown 

 reticulate with vans beneath; lobe? oblong, rot ided, fertile-ones 

 marginal fhort depn lied: ihields anterior, horizontal, tranfverfely 

 oblong, rufous-brown. Eng. Bot. 888. 

 VOL. VI. — X 5 



