MYXOMYCETES. 39 



Physarvm stromateum, Link. Hdbk., iii., 409 (1833). 

 Carcerina spumarioides, Fr. 8. V. S., 451 (1849). 

 Diderma spumarioides, Fr. S. M., iii., p. 104; Eng. FL, v., p. 

 311 ; Cooke Hdbk., No. 1109. 



Sub-Genus 3. Diderma. 



Sporangia with double walls, the outer containing lime, deve- 

 loped in a crustaceous manner, considerably divided from the thin 

 inner wall, which is without lime, and often iridescent. Rtfki. 

 .j 177. 



41. Chondxiodexma differ me. (Pers.) 



Sporangia sessile, roundish, deformed, outer wall crustaceous, 

 chalky-white, inner either opaque or beautifully iridescent, without 

 columella or capillitium, or with a scarcely evident capillitium ; 

 spores dark-violet, smooth, -01-'0125 mm. diam. Rtfki. Mm., 177. 



On bark, leaves, twigs, herbaceous stems, &c. (Figs. 137, 164, 

 165.) 



* 



Reticularia angulata, Pers., in Gmel., p. 1472 (1791). 



Diderma difforme, Pers. Disp. p. 9 (1797) ; Icon. Pict., t. 12, 

 f. 3-5 ; Nees, f. 105. 



Licea ccesia, Schum. Saell, 1500 (1803). 



Physar-um difforme, Link. Dis., i., 27 (1809). 



Amphisporium versicolor, Fr. Gast. 19 (1818). 



Licea alba, Nees, in Kze. Myk. Hft., ii., 66 (1823). 



Lycogala minutum, Grev. S. C., Fl. t. 40 (1823). 



Reticularia pusilla, Fr. Orb. Vet,, i., 147 (1825). 



Diderma cyanescens, Fr. S. M., iii., 109 (1829) ; Eng. Fl., v., p. 

 312 ; Cooke Hdbk., No. 1115. 



Plrysarum ccesiwn, Fr. S. M., iii., 147 (1829). 



Physarum album, Fr. S. M., iii., 147 [1829J ; Letell., t., 710, f. 4 ; 

 Cooke Hdbk., No. 1140. 



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



Diderma nitens, Klotsch., in Hook. Herb.; Eng. Fl. v., p. 312 ; 

 Cooke Hdbk., No. 1113. 



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



Leocarpiis cyanescens, Fr. S. V. S., 450 (1849). 



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



Dideima Libertianum, Fres. Beit., t. iv., f. 16-27 (1850). 



Didymium Libertianum, DeBary Mycetozoa (1864). 



42. Chondxioderma globosum. (Pers.) 



Sporangia globose, with a narrow base en the substratum, or 

 very strongly developed, containing very much lime, seated upon a 

 chalky-white hypothallus; outer wall crustaceous, chalky-white, 

 inner wall almost cinereous or beautifully iridescent ; columella 



