310 FUNGI. {Diderma, 



Fung. Germ. 7i. 59 Sp. 3Iiicilago, Nees, / 94. Grev. Sc. Crypt. 



FL t. 267. /3. cornuta ; folds stipitate branched, branches cor- 



niculate forming firm closed blueish peridiola, bursting at the 

 apices. Sp. 3Iucilaqo, Pers. Syti. p. 163. — S. alba, FL Dan. 

 t. 1978./. I.— Ret. alba, Sow. ! t. 280. Purt. v. 2. 4- 3. w. 1076. 

 On stems of grass, &c,, generally some inches above the soil. Com- 

 mon The var. iS. is most frequent ; and is probably merely a more 



perfectly developed form. The plant at first appears like a thick white 

 froth and might easily be supposed of animal origin. 



85. DiD^RMA. Pers. Diderma. 



Peridium double ; outer crust- like smooth distinct ; inner 

 very delicate. — Name, hg, double, and h^fia, the skin, 



* Stipitate, stem distinct, 



1. D. floriforme. Bull, {fower-shaped Diderma) ; dirty yel- 

 lowish-white, stem slender, peridium spherical splitting in a 

 stellate manner, the lobes reflexed, columella obconic, sporidia 

 black-brown. Pers. Syn. p. 164. Fr. Syst.Myc. v. 3. p. 99.— 

 SphcBrocarpus floriformis, Bull. t. 371. — Leangium floriforme, 

 Grev. FL Ed. p. 455. 



On decaying trunks of trees, mosses, &c. Autumn. Swanston 

 wood, near Edinburgh. Br. Greville.— Stems springing from a com- 

 mon, thickish membrane. 



2. D. imibilicdtum, Pers. (umbilicated Diderma) ; dirty- white, 

 stem very short blunt, peridium subrotund umbilicated beneath, 

 splitting into at length patent lacinise, columella somewhat 

 rufous, sporidia purple-black. Pers. Sy7i. p. 165. FL Dan. 

 t. 1972./. 1. Fr. Syst. Myc. v. 3. p. 99. 



On bark of trees and mosses. Appin. Captain Carmichael — The 

 columella is very large white within, resembling strongly the nucleus of 

 Ncematelia encephala. 



3. D. citrimun, Schum. (lemon-coloured Diderma) ; lemon- 

 coloured, stem firm even, peridium hemispherical squamulose 

 dehiscent, columella spurious, sporidia black-brown. Fr. Syst. 

 Myc.v. 3. p. 100. — F/iysarum citrinum, Schum. ScelL 2. p. 201. 

 FL Dan. t. 1912. f. 1. (Jide Fr.) 



On leaves of Sphagnum obtiisifolium. Inverary. JRev. C. Smith. 

 — Of this I have seen but a few specimens and those only in a dry state. 

 They grow in a scattered manner, each plant adhering by a separate 

 membranous base, stem shortish, thickest below, when dry tawny-yel- 

 low. Peridium brownish, splitting irregularly in a stellate manner, 

 covered, under the lens, with minute roundish white scattered scales. 

 These differences arise perhaps merely from the plant not being fresh. 

 I have unfortunately not been able to see the figure referred to above. 

 Fries gives as the place of growth, the leaves of mosses of the genus 

 Mnium. 



** Stipitate, stem spurious somewhat confluent, 



4. D. vernicosum, Pers. (varnished Diderma^ ; peridia obo- 



