214 A Monograph of the 



Physarum caesium, Fr., S. M., iii., 147 (1829). 



Physarum album, Fr., S. M., iii., 147 (1829); Letell., t. 710, 



f. 4; Cooke, Hdbk., No. 1140. 



Didymium difformc, Duby, Bot. Gall., ii., 858 (1830). 

 Didcrma nitens, Klotzsch, in Hook. Herb.; Eng. Fl., v., 



p. 312; Cooke, Hdbk., 1113. 

 Didcrma Neesii, Corda, Ic., ii., f. 58 (1838). 

 Leocarpus cyanescens, Fr., S. V. S., 450 (1 849). 

 LeocarpiM nitens, Fr., S. V. S., 450 (1849). 

 Didcrma Libcrtianum, Fres., Beit., t. iv., f. 16 27 (1850). 

 Didymium Libcrtianum, De Bary, Mycetozoa (1864). 



TT, A 

 Chondrioderma Berkeleyanum, Rost. 



Sporangia slightly scutellate, snow-white, stipitate ; stem rigid, 

 lay at the base, becoming paler upivards; threads of capillitium 

 slender, anastomosing to form a net ; spores dingy violet, strongly 

 warted, 10 11 p diameter. 



Chondrioderma Berkeleyanum, Host., Mon. App., p. 16 ; Sacc., 

 Syll., no. 1258. 



Island of Tahiti. 



There is no specimen in the Berkeleyan Herbarium answer- 

 ing to the above description, and in the " Introduction to 

 Cryptogamic Botany," p. 335, the spores are described and 

 figured wrlh a reticulate epispore. 



(Rostafinski's Synonym.) 



Tricliamplwra pczizoides, Berk., Intr. Or. Bot., p. 335, non 

 Junh. 



Chondrioderma physarioides, Rost. (figs. 59 62). 



Gregarious, sessile on a broad base, circular or irregularly 

 elongate^, depressed, outer cretaceous wall polished, pure white 

 or ivory Unted, inner wall dirty ochraceous, sometimes separated 

 from the outer wall by a space containing air ; columella obsolete ; 

 threads of capillitium equal, about 3 p. thick, colourless, some- 

 times rough in parts with minute particles of lime, branching 



