CkYPTOGAMIA. ALGAE. 1938. Lichen, 1753 



Jjypercllus. Rugged, areolate, glabrous, greenifh-yellow : heads 

 piceous, Mack above, lenticular: ftalks cylindrical, thickened at 

 the bafe. 



*chryfocephalus. Granular, citron-ydiow : heads lenticular, black, 

 yellow-mealy above and on the margin, on polifhed cylindrical 

 {talks. Linn Trans. 7, /. 8. /. 1, 



haiolus. Granular, areolate, yellow-green: heads bhck-rufous, gla- 

 broiis, polifhed, turbinate-lenticular, with a black difk; ftalks 

 comprefled, long, taper, flexuous. Achat, t. 2. f. 4. 



corynellus- Leprous, mealy, fulphnr-green: heads lenticular, black, 

 on'ftraight cylindrical ihojtifh. (talk?. 



lygodes. Leprous-, grr.nular-nealy, dirty green : heads turbinate len- 

 ticular, black, on long round flexile ftalks. 



thlonllus. Very thin, whitilh: heads turbinate, bralTy-green out- 

 wardly, brow;i-:realy above; ftalks thickened upwards, tapering 

 to the bafe. grey(fh-. -Achat, t, %.f. 5. 

 2. elatinxss. Whitifh, very thin, Tome what mealy: -leads greenifh under- 

 - neath, brQWiHaealy above; ftalks j$tiftwra, cylindrical, grey -brown. 



-cantherellus. Thin, white, powdery: heads yeilowifh, white-mealy, 

 lenticular; ftalks filiform, becoming naked, rufous-brown. 



Hoff.t,4:f. »: 



peronelius. Grey white, very th?n: heads lenticular, with a convex 

 flefh-colour white-mealy difk; items filiform, femitranfparent, 

 pale, becoming black ifh. 

 glauceUus. Glaucous white, very thin : heads blackifh, becoming 

 globular, hoary-mealy underneath, brown-mealy above ; ftems 

 filiform. 

 2. epidryus. Cruft hardly any: heads globular-lenticular, brown-rufous 

 mealy, naked underneath; Hems black, filiform, polifhed. 

 mcicularis. Leprous, mealy, paie yeliowifh-green : heads nearly 

 globular, fulvous-mealy ; ftems filiform, fhort, erect, fulvous- 

 mealy. 

 •capitatu:, Leprous, mealy, yellowifh-green: heads globular, yellow, 

 with a brown powdery difk; ftalks long, a little flexuous, yellow. 

 Eng. Bot. t. 1539. 

 fubtilis. Tubercles globular, greyifh : ftalks filiform, fometimes 

 divided, blackifh. 

 4. Tubercles feffile, convex or bemifpharical, blacky variously plaited, 

 clofed, irregularly bur/ling when old: frond foliaceous, membra- 

 naceous, or cartilaginous- Gyrophora 

 glaber. Membranaceous, pe'tate, unequally lobed, black-green, 

 black underneath, naked and quite fmooth both fides: tubercles 

 nearly globular, wrinkly-plaited- Ad. Stocbk. 5. /. 2./. 5. a. b. 

 *z. polypbyllus. Frond complicate, with many luxuriant crowded irregular 

 curled fegments. E. Bot. 128?., 



VOL. VI.— R 5 



