278 A Monograph of the Myxogastres. 



Phymrum anccps, Fckl., Sym. Myc, 343 (1869). 

 Didymium nectriaformc, B. and C, Grev., 353. 

 Didymmm croceo-fiavium, B. and Br., Fung. Ceylon, u. 757. 

 Didymium latcritium, B. and Br., MSS, 



Physarum melleum, Mass. 



Sporangia stipitate, hemispherical, flattened below, wall thin, 

 yellowish-olive or honey-coloured, sprinkled with minute particles 

 of lime ; columella small, white ; capillitium very dense, snow- 

 white, oiodes nuvierous, very large, angularly stellate, separated 

 from each other hy constrictions only, lime in the form of granules 

 present in every portion ; spores globose, pale lilac, minutely 

 vcrruculose, 6 — 7 /x in diameter ; stem about equal to the 

 sporangium in length, rather thick, equal, white, longitudinally 

 wrinkled, filled with particles of lime, Itypothallus ahsent. 



Didymium mcllcum, Berk, and Broome, Ceylon Fung., n. 751, 

 in Journ. Linn. Soc, vol. xiv., p. 83. 



(Type in Herb. Berk., Kew, n. 10,810.) 



Physarum Schitmacheri, Bost., Mon., p. 99 (in part). 



Physarum citrinum, Sacc, Syll, vii., 1, n. 1176 (in part). 



On dead leaves. Ceylon. 



About 2 mm. high. Distinct from P. Schummheri in the 

 dense Badhamia type of the capillitium, smaller spores, and 

 absence of the hypothallus. 



Physarum citrinellum. Peck. 



Sporangia subglobose or slightly attenuated at the base, sub- 

 stipitate, wall thin, pcde yelloio, sometimes with a greenish tinge, 

 rough with numerous crystals of lime, becoming irregularly 

 ruptured at the apex; the very short stem is rufous, longi- 

 tudinally wrinkled, and expands into a minute hypothallus; 

 columella absent; capillitium rather dense, nodes irregularly 

 stellate-angular, large, containing colourless granules of lime, 

 intcrnodcs elongated, very thin, colourless, without lime; spores 

 globose, pale lilac, minutely wartcd, 7 — 8 \x diameter. 



Physarum citrinellum. Peck. 



On mosses. United States, 



