278 Rev. W. A. Loighton on the British Uinbilicaria). 



many species. In my opinion our British Vinbi/irarue uppcai' to 

 resolve tliemsi'lves into two species only, (/. j/it.s/uliila, which has 

 peculiar sporiclia, and U. i^nrin, which may include all the rest, 

 the sporidia beint; alike in all ; and this latter species comprises 

 two series distinguished by the co|)pcr or grey colour of the 

 thallus. 



1, Uiiihilicaria varia. Thallus coppery or ashy-grey, simple 

 or compound, naked or tViuged at the margins; upper surface 

 smooth, efflorescent, granulate, jjustulate, areolate, corrugate or 

 reticulated; lower surface smooth, pitted, granulate, papillose, 

 tibrous or reticulated; sporidia in asci, eight, minute, oblong, 

 pale. 



* Thallus dark cujipet'-coluured when dry. 



a. polyphijlla, Schrad. Thallus thin, unequally lobed, naked 

 and smooth on both sides; uj)per side greenish coi)per-colour, 

 under black. 



Lichenoides ienue pullum, fotiis ittrinque ylabris, Dill. 22b. t. .':!(). f. 12!). 



A. U. C (1741). 

 Lichen ij-c. undiijue yhiber, Linn. Fl. Lajip. no. 452 (excl. svn.). 

 Lichen polyphyllns, Linn. Sp. PI. KilS {vA. 2. 17^.1) ; Iliids." Fl. Hrit. 5.01 ; 



Lightf. Fl. Scot. 2. S(i;i; Rol)s()n, Hr. Fl. .iOO; Wi-h. Spieil. 2.0S ; Iluinb. 



Fl. Fiieb. 2!); Uctz. Scand. 2SS; With. An-. 4. G5 ; Sm. E. Hot. 



t. 12S2. 

 Lichen qlnber, "Ach. in Act. Stoc-kh. .\v. 95. t. 2. f. 5" (1794) (fide Ach. 



et t. & B.); Ach. Prodr. ML 

 Vmbilicurid polyphijlla, Schrad. Spieil. 102 {\7'.fl); Iloffni. Fl. Germ. 2. 



W.); PI. Lich. .i 14. t. 59. f. 2; «, Tuckerm. Syn. 71. 

 (iyrf)])hoTu (jldbra, \o\\. .Mctli. 101 (ISOJ); «, Syn. ().'J. excl. syn. var. flra- 



thracinn ; a., h ji. Hook. Fl. Scot. 2. 41 ; Ilcppe, Fl. Wurzburg. 69 ; 



Clu'v. Fl. Paris, ed. 2. 1. (M.l 

 Uinbilivurin (jUd>rn x, DC. Fl. Fran?, ed. .3. :i. 412(lS05). 

 (Jyrophora keteroidea a. i<f ^, Ach. L. Univ. 218 (IHIO); Moug. & Nestl. 



■AV2 ! 

 Gyroinium polyphyllum, Wahl. Fl. Lapp. 481 (1812); Fl. Carpath. ^.94 ; 



Fl. Ipsal. 12.<; Fl. Succ. 181. 

 (Jyrnphi)ra polyphylla. Turn. & Horr. Lich. IJrit. 214 (l8l.'<)j liook. IJr. 



Fl. 2. 217 ; Kocrhcr, Lich. (Jcrni. 95. 

 Uvibilicuria (rm-u, ». r/htbni, Schicr. Spieil. 90. liC-i (1826-.33) ; Ex.s. 149! 

 Umbilicnria poh/phylid. Fries, L. Uef. .$.52. c.xd. b. & c. (18.31); S. V. S. 



117 ; Leifilit. Lich. Hrit. Kxs. 65 ! 

 Uvdjilicarin potyphylln, at. f/l/ihra. Seiner. Enum. 28 (1850). 

 Uraphis tcnea, ji. discolor, Wallr. Cryi)t. Germ. 1. .341 (1831). 



a. riiorurphyllu. Thallus of a single peltate leaf. — Turn. & 

 Bon-. /. c. 



Snowdon, Dillenias. Cheshire and Cornwall, TAch. Jiril. 

 Clova ! Craig UayiKMh ! Mr. tV. (lardiur in herh. IJorrcr. York- 

 ishire ! Mr. (J. DUon. Scotland ! Mr. G. Laivson. Ingleby and 



