CALltlVM.] 



CAUCIEl. 



87 



V 



Subgen.EUCALICIUit Cromb. Grevillea, xv.( 18SG) p. U.— Thalltis 

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



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

 sporal mass umbrine. 



2, C. chrysoceplialum Ach. 

 Meth. Suppl. (lbU3)p. 15.— Thai- 

 las thickish, granulate, granules 

 usually conglomerate, citrine or 

 bright greenish-yellow. Apothe- 

 cia scattered ; stipes rather short, 

 slender, black or blackish-brown ; 

 capitulum tiirbinato - lentiform, 

 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. — C'liphdium chrysocejj?ialum 

 Mudd, Alan. p. 261. Pluicotium 

 chrysoeejjhalum Gray, Xat. Arr. 

 i. p. 484. Liclun clinjsoc^jphaJus 

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

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

 t. 2501. Calicium chrtjsocepha- 

 lum Sm. Eng. Fl. v. p. 140. — 

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

 parte; Mudd, n. 251. 



• 



1 ' 



Fig. 21. 



CaUcium quercinum Pers. — a. Goni 



dia, X 350 diameters. b. Apo- 



thecium, X 30. c. Section of 



apothpcium (moistened), X 30. 



d. Theea and paraphyses, X 350. 



e. Spores, X 500. /. Vertical section 

 of a spermogonium, X 3U. g. Ste- 

 rigmata, and h spermatia, X 500. 



Readily distinguished bv its bright 

 yellow thallus, which in British 

 specimens is persistent, and by the 

 colour of the margin and of the imder- 

 side of the capitulum, but the latter 

 disappears in old plants. The apo- 

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

 if subsessile. 



Hah. 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 ; Wiilthamstow, 

 Essex ; Penshurst, Kent ; Bolney, Sussex : ' Lyndhurst, Xew Forest, 

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

 Park, near Ludlow, ShropsLu-e ; Rosedale, Cleveland, Yorkshire. Falls 

 of Clyde, Lanarkshire ; Aberfeldy, Perthshire. 



Form 1. melanocephalimi Xyl. Syn. i. (1S60) p. 147, t. v. f. 19. — 

 Apothecia fasciculately branched ; stipes black ; capitultim black, 

 citrino-sutfused 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. E:cs. : 

 Leight. n. 134, pro parte. 



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



