CALICIUM.] CALICIEI. 87 



Subgen.EUCALICIUM Cromb. GreviUea, xv.(1886) p. 14. Thallus 

 with globulose gonidia ; spores globose or ellipsoid, simple or 1-eeptate. 



a. Spores globose, very rarely oblong, simple, browniah ; 

 sporal mass umbrine. 



2. C. chrysocephalum Ach. 

 Meth. Suppl. (1803) p. 15. Thal- 

 lus thickish, granulate, granules 

 usually conglomerate, citrine or 

 bright greenish-yellow. Apothe- 

 cia scattered ; stipes rather short, 

 slender, black or blackish-brown ; 

 capitulum turbinato - lentiforin, 

 black, beneath and at the margin ci- 

 trino-suffused ; spores 0,003-6 mm. 

 in diameter. Cromb. Lich. Brit. p. 

 11 : Leight. Lich. Fl. p. 39, ed. 3, 

 p. 39. Cyphelium chrysocephalum 

 Mudd, Man. p. 261. Pluicotium 

 chrysocephalum Gray, Nat. Arr. 

 i. p. 484. Lichen chrysocephalus 

 Turn. Linn. Soc. Trans, vii. (1804) 

 p. 88, t. 8. f. 1; Eng. Bot. 

 t. 2501. Calicium chrysocepha- 

 lum Sm. Eng. Fl. v. p. 140. 

 Brit. Exs. : Leight. n. 134, pro Fig. 24. 



parte; Mudd, n. 251. Calicium quercinum Pers. a. Goni 



dia, X 350 diameters. b. Apo- 



Readily distinguished by its bright thecium, x 30. c. Section of 

 yellow thallus, which in British apothpcium (moistened), X 30. 

 specimens is persistent, and by the d. Theca and paraphyses, x 350. 

 colour of the margin and of the under- e. Spores, x 500. /. Vertical section 

 side of the capitulum, but the latter of a spermogonium, x 30. g. Ste- 

 disappears in old plants. The apo- rigmata, and h spermatia, x 500. 

 thecia are more or less scattered, rarely here and there aggregate, and as 

 if subsessile. 



Hob. On old pales and barn-doors in maritime and upland tracts. 

 Distr. Local and scarce in a few localities throughout England ; very 

 rare in S. and Central Scotland. B. M. : Bury, Suffolk ; Walthamstow, 

 Essex ; Penshurst, Kent ; Bolney, Sussex ; Lyndhurst, New Forest, 

 Hants ; Downton Castle, Herefordshire ; Hatfield, near Worcester ; Hay 

 Park, near Ludlow, Shropshire ; Rosedale, Cleveland, Yorkshire. Falls 

 of Clyde, Lanarkshire ; Aberfeldy, Perthshire. 



Forml. melanocephalumNyl.Syn. i. (1860) p. 147, t. v.f.19. 

 Apothecia fasciculately branched ; stipes black ; capitulum black, 

 citrino-suffused only at the margin ; spores globose or ellipsoid, 

 pale-brown, 0,004-16 mm. long, 0,004-8 mm. thick. Leight. Lich. 

 Fl. p. 40, ed. 3, p. 39 ; Cromb. Grevillea, xv. p. 14. Brit. Exs. : 

 Leight. n. 134, pro parte. 



From the type, with which it grows associated, this is distinguished 



