Phij.^dnun. 293 



Physarum pulcherrimum, B. and R. 



Sporangia globose or broadly elliptical, sometimes slightly 

 umbilicate below, stipitate, varying in colour from clear dccj) 

 rose-red to pink; stem similarly coloured, varying length from 

 once to twice the length of the sporangium, slender, expanding 

 at the base into a circular hypothallus, filled with particles of 

 lime, longitudinally wrinkled ; columella absent ; capillitium 

 variable, sometimes scanty, at others rather copious, threads 

 thin, forming an irregular network, colourless, or tinged pink, 

 swollen portions elliptical, small, nuviher variaUe, interstitial, 

 rarely produced at the nodes, containing pink granules of 

 lime ; spores globose, reddish-lilac, very minutely verruculose, 

 8 — 10 [M diameter. 



Fhysarum pulcherrimum, B. and Rav., Grev., vol. ii., p. 65, 

 fig. 84; Cke., Brit. Myx.. fig. 84; Sacc, Syll., vii., 1, n. 1178; 

 Rost., Mon. Append., p. 8. 



(Type in Herb. Berk., Kew, n. 10,781.) 



On wood, &c. United States; Paraguay. 



A slender, delicate species, stem thin, erect; sporangium 

 covered with a smooth crust composed of minute granules of 

 lime. The hypothallus is usually pale ochraceous and wrinkled. 

 Gregarious, sometimes becoming crowded, rarely 2 — 3 sporangia 

 supjDorted on a common stem, from Vb — 2 mm. high. 



* Epi^porc smooth. 

 Physarum Carlylei, Mass. (figs. 240, 241). 



Sporangia stipitate, broadly pyriform, orange-vermilion, mi- 

 nutely furfuraccous ; stem about equal in length to diameter 

 of sporangium, thick, rugulose, vermilion, expanding downwards 

 into a small wrinkled hypothalkis ; threads of capillitium thin, 

 yellow, forming a dense net, swollen at the angles and there 

 containing orange-coloured granules of lime ; columella absent ; 

 spores globose, smooth, dirty violet, 7 — 8 /x diameter. 



Grev., vol. xvii., March (1881)). 



On rotten wood. Carlisle. (Dr. Carlyle.) 



