Bidymium,-] FUNGI. 313 



dium globoso-depressed furnished beneath with a cinereous 

 umbilicus, stem very short even white, columella white, sporidia 

 brown-black. Fr. Syst. Myc, v, 3, p. 118. — Didcrma squamulo- 

 sum, Alb. c3' Schw. Consp. t. 4./. 5. — Diderma glohosum, Part, ! 



MSS. 



On leaves, twigs, &c. Not uncommon. 



8. D.fnrindceumi Schrad. {ineahj Didymiuni) ; peridium sub- 

 rotund very delicate at length black, clothed with cinereous 

 flocculose meal, stem short brown-black as well as the sporidia. 

 Schrad. nov. gen. t. 5.f. 6. JFr. Syst. Myc. v. 3. jj. 119. — Phys. 

 Jarinaceunii Pers. Syn. p. 174. — Triclda sphceiocephala, Sow.! 

 L 240. 



On leaves, moss, bark, &c. Not uncommon. 



4. D. nigripes, Lk. (hlack- stemmed Didymiiim) ; peridium 

 globose grey from the delicate meal with Avhich it is clothed, 

 stem elongated rigid even black, columella obsolete, flocci and 

 sporidia dingy-brown. Fr. Syst. Myc. v. 3. p. 119. — Physarwn 

 nigripes, Link, in Berl. Mag. 3. p. 27. Ditm. in St. Deutscli. 

 Fl. t. 42. Grev. Fl. Ed. p. 454.'—Trichia alba, Pint. v. 2 S^- 3. 

 71. 1113. 



On rotten wood. Not rare. — Remarkable for its dark, stiff, hair- 

 like stem. 



5. D. pertusum, Berk, (^pierced Didymmm') ; scattered, peri- 

 dium white mealy depresso-globose deeply but narrowly unibi- 

 licated,stem attenuated upwards rufous, columella central white, 

 flocci brownish, sporidia brown-black. 



On the decorticated stem of some large herbaceous plant, Appin. 

 Captain Carmichacl. — This approaches very near to 1). xant/iu///es, 

 but the cohnnclla is not truly stipitate, but only apparently so from the 

 great depth of the umbilicus. 



G. D. hucupus, Lk. (tvhite- stemmed Didyminm) ; head glo- 

 boso-depressed pale glaucous, stem very short thick pale at 

 length brownish. Fr. Syst. Myc. v. 3. />. 121. — Phys. Itucopas, 

 Link, I. c. Grcv. Fl. Ed. p. 454. 



On dead bcccii wood. Autumn. Foxliall, near Edinburgh. Cajit. 

 Wmah. — " Very minute, of an uncommonly .slit!" and dwarf as[)ecr. 

 Filaments very few. Differs from Link's Ph. Iciicopus only in having 

 a coloured stem." Grcv. I. c. Dr. Grevillc does not inform us 

 whether it has or has not a columella. I have given his speci- 

 fic character above, as, of course, more likely to enable any one to 

 recognise the plant lie luul in view, but as this differs somewhat from 

 that assumed bv Tries, it may be proper to subjoin it. " Minute, globose, 

 white, stem white slightly entering the peridium, flocci white." 



7. D. Sowerbcii, Berk, (darh-grry Didymium) ; subfascicu- 

 late, peridium globose dark-grey und)ilicated benealii, stem 

 slender, columella white. Saw. t. 412. /'. 3. 



On a decaying bulb in a parlour. London. <Sou'c/by. 



