Ceink<)iv><kia. 337 



Very closely allied to the genus rhijsarum, differing only in 

 having some free ends to the network of the capillitium. 

 Distrih. Europe ; United States, Species 1. 



Ceinkowskia reticulata, Rost. (figs. 266, 267). 



Plasmodiocarp elongated, sinuous or irregularly anastomosing, 

 wall rough with lime, deep yellow, sometimes with a tinge of 

 brown; capillitium rather scanty, threads yelloiv, about 3 /ix 

 thick, forming an irregular net, ^oith free, curved, pointed ends ; 

 here and there large, irregular, flattened nodes containing yellow 

 granules of lime are present; spores globose, dull violet, very 

 minutely verruculose, 8 — 10 /x diameter, 



CeinJcowsJcia reticulata, Rost., Mon., p, 91, fig, 107; Cooke, 

 Myx. Brit, fig, 107; Schroeter, p, 131 ; Sacc, Syll, n, 1440. 



On dead leaves and wood. Britain (Sibbertoft) ; Germany ; 

 Sweden ; United States. 



Usually forming an irregular network '5 — 2 cm. across, de- 

 hiscing irregularly. The number of flattened, lime-containing 

 nodes varies considerably in different individuals, being some- 

 times very numerous and originating mostly from the wall of 

 the sporangium. Closely resembling in habit and general 

 appearance Physarum gyrosum, Rost., a species not yet dis- 

 covered in Britain, 



(Rostafinski's Synonyms.) 

 Physarum retieulatum, Alb, and Sz,, l.c, 251, t. 7, f 2 (1805). 

 Diderma retieidatum, Fr., I.e., iii., 112 (1829). 

 Didymium retieulatum, Bischoff, Kryptogamenkunde, f 361 

 (1842). 



Leocarpus, Rost. 

 Wall of sporangium composed of two distinct layers, dehiscing 

 in an irregular manner ; capillitium attache4 at numerous points 

 to wall of sporangium, threads combined to form a dense, 

 irregular network with numerous nodes, many of which are 

 empty, the remainder large and filled with small granules of 



