TRACHYTJA.] 



103 



Acolium sti'jonelhun Mudd, Man. p. 254. CaUcium st-igonellutn 

 Ach. Meth. (1803) p. 88, pro parte. CaUcium sessile ft, marginatum 

 Turn. & Borr. Lich. Br. p. 128; Sm. Eng. Fl. v. p. 138. Brit. 

 Exs. : Leigh t. n. 226; Cromb. n. 11. 



This species is closely allied to the preceding, but is distinguished by 

 the smaller and constantly naked, somewhat scattered apothecia, and by 

 its being entirely parasitic. 



Hob. On the thallus of various Perttisarice, on old oaks, in upland 

 woods. Distr. General, though not common, throughout England. 

 B. M. : Eppiug Forest, Essex ; Shiere, Surrey ; St. Leonard's Forest, 

 Sussex ; near Lyndhurst, New Forest, Hants ; Oakley Park, near Ciren- 

 cester, Gloucestershire ; Hendlip, near Worcester ; Gopsall Wood, I^>i- 

 cestershire ; Llanforda. Shropshire; Easby Wood and Ingleby, Cleveland, 

 Yorkshire ; Leven's Park, near Kendal, Westmoreland ; Teesdale, 

 Durham. 



Tribe II. SPHJEROPHOREI Xyl. Mem. Soc. Cherb. 

 iii. (1855) p. 168 ; Syn. i' p. 1G9. 



Thallus vertical, fruticuloso-divided or ramulose, sut 

 incrassate at the apices, within entirely filamentose. Apothecia 

 terminal, innate, at first closed, at length with the thalline receptacle 

 irregularly lacero-dehiscent ; sporal mass copious, black : spores 8na3, 

 in evanescent theca?, simple or 1-septate, spherical or ellipsoid, 

 blackish or brown. Spermogones terminal, black or pale. 



This is closely allied to the preceding tribe. Their thalli are no doubt 

 very different iu form and texture ; but the fully developed fructification 

 of the Sph<erophorei is similar to that of the Culieiei. 



25. SPILffiROPHO- 

 RUS Pers. in Ust. Ann. 

 vii.(1794)p.23. (Splice- 

 roplioron Ach. Meth. 

 (1803) p.134.) Thallus 

 csespitoso - fruticulose, 

 branched, smooth, fra- 

 gile ; medullary layer 

 white, woolly ; cortical 

 layer corneous, some- 

 what shining. Apothecia 

 situated on the dilated 

 apices of the primary 

 axes, paraphyses very 

 scanty ; spores covered 



with a black pigment. Spfiferopkoruscoralloides A.ch. a. Vertical section 

 Spermogones black with of an apothecium (in dry state), x30. b. Theca 

 short, jointed sterigmata ancl paraphyses, x3f)0. r. Three spores (two of 

 and ohlon<r snorm-iti-i wllich are miked )' X500. d. Vertical section of 



long spermatia. a spermogollium x30 e _ Arthrosteri-mat:, 



and spermatia. x'i'K). 



