128 THE NORTH AMERICAN SLIME-MOULDS 



lately crystalline or amorphous lime. Columella none. Capillitium 

 consisting entirely of straight membranous, tubular, columns, extend- 

 ing from the base to the upper wall of the plasmodiocarp, 7-22 jtt 

 thick and usually containing small crystalline masses of lime. Spores 

 bright violet-brown, minutely and irregularly spinulose, 10-11.5 /x 

 diam. 



Hab. on the inner bark of Populus. Colorado Springs, Colo,, July 

 1911. 



Our specimens by the courtesy of Dr. Sturgis. 



EXTRA-LIMITAL 



18. DiDYMiUM INTERMEDIUM Schroeter. 



1896. Didymium intermedium Schroet., Hediviffia, Vol. XXXV., p. 209. 

 1902. Didymium excelsum Jahn, Ber. Deut. Bot. Ges., XX., p. 275. 



Sporangia clustered or gregarious, discoidal and umbilicate below, 

 or lobed or convolute, greyish white, stipitate; stipe pale yellow, 

 tapering upwards, stuffed with lime crystals, expanding into the j^el- 

 lowish, discoidal, recurving columella; capillitium colorless, more or 

 less branching; spores dark purple-brown, irregularly reticulate, 

 9-12 II. 



Differs from D. squamulosum in the reticulate epispore. Brazil. 



19. Didymium leoninum Berk. £sf Br. 



1873. Didymium leoninum Berk. & Br., Jour. Linn. Soc, XIV,, p. 83. 

 1876. Lepidoderma tigrinum Rost, A pp. to Man., p. 23, 

 1909, Lcpidodermopsis leoninus v, Hohnel, Sitz. K. Ak. Wiss. Wien, Math. 

 Nat. Ks., CXVIII,, 439, 



Sporangia gregarious, subglobose, covered more or less completely 

 with white or yellowish deposits of crystalline lime, stipitate ; stipes 

 short, orange or brown, containing lime, enlarged to form the globose 

 orange columella and often connected at base by a venulose hypothal- 

 lus ; capillitium of slender threads, anastomosing, colorless at the tips ; 

 spores violet-grey, minutely warted, 7-9 ju. 



Like Lepidoderma tigrinum, but has different calcic crystals. 



Java and Ceylon, 



