GYROPHORA. ] GYROPHOREL. 325 
mm. long, 0,008-10 mm. thick.—Mudd, Man. p. 120; Cromb. Journ. 
Linn. Soc. Bot. xvii. p. 575.—Umbilicaria grisea Leight. Lich. Fl. 
p. 157, ed. 3, p.147. Umbilicaria varia n. grisea Leight. Ann. 
Mag. Nat. Hist. ser. 2, xviii. p. 288. Lichen griseus Sw. in Westr. 
Vet. Ak. Handl. 1793, p. 52. Gyrophora murina Ach. Eng. Bot. 
t. 2486 ; Gray, Nat. Arr. i. p. 478; Sm. Eng. FL. v. p. 218. Lichen 
Dillenti With. Arr. ed. 3, iv. p. 63. Lichen deustus Huds. Fl. Angl. 
p- 455. Lichenoides coriaceum cinereum, peltis atris compressis Dill. 
Muse. 219, t. 30. £117. Lichenotdes savatile foliis minus divisis, 
cinereo-fuscum Dill. in Ray, Syn. ed. 3, p. 73, n. 66. 
Has its nearest ally in G@. Airswta Ach., which is unknown in this 
country. It is easily recogaized from the allied British species by the 
colour of the thallus, which is geuerally monophyllous, and by the cha- 
racters of its upper and lower surfaces. With us it is not seen fertile. 
Hub. On rocks in maritime districts. Distr. Found only very sparingly 
in the Channel Islands and S.W. Englani (Hb. Buddle)—B. M.: 
Beauport, [sland of Jersey. St. Vincent’s Rocks, Bristol, Gloucestershire. 
There is also a specimen marked ? Glyder Vawr, N. Wales, where it is 
not likely to have been gathered. 
2. G. proboscidea Ach. Meth. (1803) p. 105.—Thallus mono- 
phyllous, somewhat thin, nearly moderate or small, crenate or 
slightly lobed at the margin, reticulato-rugose (especially in the 
centre), blackish-brown or blackish, greyish-pruinose in the centre ; 
beneath smooth, naked, pale-greyish or partly dark-greyish (K_, 
Cacyt reddish), Apothecia at first thinly margined and somewhat 
plane, at length immarginate, convex, gyroso-plicate ; spores 0,012~ 
18 mm. long, 0,006-8 mm. thick.—Eng. Bot. t. 2484; Gray, Nat. 
Arr. i. p. 476; Hook. Fl. Scot. ii. p. 41; Turn. & Borr. Lich. Br. 
p- 222; Sm. Eng. Fl. v. p. 217; Mudd, Man. p. 118.—Umbilicaria 
proboscidea Cromb. Lich. Brit. p. 40; Leight. Lich. Fl. p. 160, ed. 3, 
p. 147. Lichen proboscideus Ach. Prodr. (1798) p. 147... Uibili- 
caria varia 8. deusta Leight. Ann. Mag. Nat. Hist. ser. 2, xviii. 
p. 289. Lichen deustus Huds. Fl. Angl. p. 455; Lightf. Fl. Scot. ii. 
p- 861; With. Arr. ed. 3, iv. p. 63. 
Distinguished from allied species by the thallus. being more or less 
reticulato-corrugate on the upper surface, with the rug more distinct in 
the centre and less visible towards the circumference, where it is some- 
times nearly smooth. The thallus is closely appressed to the sub- 
stratum, thinnish, somewhat rigid and brittle, varying in other respects 
as in the forms and variety that follow. It is generally well fertile, with 
numerous and small, or fewer and nearly moderate apothecia. The 
spermogones are rare, with the spermatia about 0,004 mm. long, 0,001 
mm. thick. 
Hab. On rocks and: stone walls in upland and subalpine regions.— 
Distr. Somewhat local in N. Wales, N. England, and in 8. Scotland; 
general and plentiful amongst the Grampians ; reported also (but doubt- 
fully) from S.W. Ireland.—B. M.: Cader Idris, Merionethshire ; Snow- 
don, Carnarvonsbire ; li mee Teesdale, Durham. New Galloway, 
Kirkcudbrightshire; Ben Lawers and Ben More, Perthshire; Clova, 
