Diih/mmw. 233 



151; Cooke, Myx., p. 38, f. 142—145, 151; Schroeter, p. 123 ; 

 Sacc, Syll., n. 12G9. 



Chondriodcrma stroviateum, Rest,, Mon. Append., p. 18, f. 151. 



Didcrma farinaccnni, Peck, 26tli Report State Mus., N. Y., 

 p. 74. 



Exsic.c. — Fckl., F. Rlien., 2495 (as Carccrina spuntarioidrs, 

 Fr.) ; Rab., F. Eur., 432 (as Carccrina sjnwiarioidcs, Fr.) ; Cke., 

 F. Brit., Ed. II., 825 ; Roum., Fung. Gall., 1682. 



On living or dead leaves, moss, &c. 



Britain (Higligate, Shore, Scarboro') ; France ; Germany ; 

 Sweden ; Belgium ; Italy ; United States ; Australia. 



The present species was placed by Rostafiuski in the genus 

 Chondrioderma, from which it differs, according to our inter- 

 pretation of the genus, in the pulverulent, instead of porcelain- 

 like coat of lime. Very variable in colour and size of the 

 columella, but well marked by the highly-developed hypo- 

 thallus, which sometimes becomes so thick as to suggest the 

 idea of a stroma. Sporangia from '5 — 1"5 mm. diam., circular 

 or irregularly angular from mutual pressure, sometimes the 

 stroma, when very thick, forms a short stem-like projection ; 

 the colour of the stroma and columella varies from chalk-white 

 through pale tints to pale flesh-colour. 



(Rostafinski's Synonyms.) 

 Sjnomaria physarioides, Pers. Syn., 163 (18U1). 

 Fhysarum didcrmoides, Fries, Herb. 

 Spumaria alha, Schum. Saell., No. 1414 (1803); Fl. Dan., 



t. 1798, f. 2. 

 Didymium spiumarioidcs, Fr., Symb. Gast., 20 (1818). 

 Fhysarum stromatium, Link, Hdbk., iii., 409 (1833). 

 Carccrina sp'amarioides, Fr., S. V. S., 451 (1849). 

 Didcrma sjmmarioidcs, Fr., S. M., iii., p. 104; Eng. FL, vol. v., 



p. 311; Cke., Hdbk., No. 1109. 



Didymium physarioides, Rest. 

 Sporangia cylindric-ohlonff, often crowded and ilefornied, 

 seated on a well-developed hypothallus, sessile or with a short 



