92 LICHENACELI. [caLiciuM. 
—Distr, Local and scarce in E., 8., and W. England, and among the 8. 
Grampians, Scotland. —B. M. : New Forest, Hants; Sapperton, Gloucester- 
shire ; Malvern, Worcestershire. Ben Lawers, Perthshire. 
Form 2. baliolum Ny]. Syn. i. (1860) p. 153.—Apothecia larger, 
the stipes thicker and compressed at the base.—Cromb. in Grevillea, 
xv. p. 14.—Caliciwm baliolum Ach. Lich. Univ. (1810) p. 238. 
Differs from the type merely in the stipes. In the only British speci- 
men the apothecia are numerous and some are nearly sessile. 
Hab. On old pales in wooded upland districts.—-Distr. Only in S.W. 
England.—B. M.. Near Lyndhurst, New Forest, Hants. 
9. C. quercinum Pers. Tent. (1797) p. 59.—Thallus thin, granu- 
lose, or nearly smooth, or leprose, greyish-white or scarcely any. 
Apothecia moderate, numerous ; stipes somewhat long, stout, black ; 
capitulum turbinato-lentiform, white-pruinose, at length naked, 
beneath grey-pruinose ; spores somewhat constricted in the middle, 
1-septate, 0,005-9 mm. long, 0,003-5_mm. thick.—Ny]l. Syn. i. 
p. 155, t. v. f. 25; Mudd, Man. p. 257; Cromb. Lich. Brit. p. 13; 
Leight. Lich. Fl. p. 48, ed. 3, p. 48.—Caltctum clavellum Turn. & 
Borr. Lich. Br. p. 138 ; Sm. Eng. Fl.v. p. 189. Lichen clavellus Eng. 
Bot. t. 1465. Phacotium claviculare Gray, Nat. Arr. i. p. 483.— 
Brit. Hws.: Mudd, n. 244; Bohl. n. 95. 
When fully developed the thallus is subtartareous, but frequently it is 
but little visible. In all conditions, however, the species is readily recog- 
nized, even when the disk is naked, by the grey pruina of the capitulum 
beneath, which in a growing state is always persistent. The apothecia 
are frequent, and the spermogones are usually abundant and crowded. 
Hab. On old pales and the decayed trunks of trees in wooded 
upland tracts.—Dvst7. Local and scarce throughout England; very rare 
in 8. Scotland; not known in Ireland—B. M.: Lakenham, Norfolk; 
Henfield, Sussex ; Lyndhurst, New Forest, Hants; Birkland, Notting- 
hamshire ; Hay Park, Ludlow, Shropshire; Baysdale, Cleveland, York- 
shire ; Hexham, Northumberland. Falls of Clyde, Lanarkshire. 
Var. 6. lenticulare Ny]. Syn. i. (1860) p. 156.—Thallus thin, gra- 
nuloso-leprose, whitish, or scarcely any, or obsolete. Apothecia 
moderate, numerous; stipes somewhat robust, black; capitulum 
tubiformi-dilated, entirely naked, concolorous ; spores as in the type 
or slightly narrower.—Cromb. Lich. Brit. p. 18.—Caliciwm lenti- 
culare Ach. Vet. Ak. Handl. 1816, p. 262, t. 8. f. 4.—Brit. Evs.: 
Cromb. n. 112 pro parte. 
This differs chiefly in the form and colour of the capitulum, which is 
not pruinose. It is a very distinct variety ; perhaps it should rank asa 
subspecies. 
Hab. On old oak Baty in wooded upland tracts.—Distr. Local and 
scarce in S. and W. England, and in N. Wales.—B. M.: Shiere, Surrey ; 
New Forest, Hants; Lewes, Sussex; Bovey Tracey, 8. Devon; Bar- 
mouth, Merionethshire ; Ennerdale, Cumberland. 
