Physanun. 293 



Physarum pulcherrimum, B. and R. 



Sporangia globose or broadly elliptical, sometimes slightly 

 umbilicate below, stipitate, varying in colour from clear deep 

 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, number variable, interstitial, 

 rarely produced at the nodes, containing pin,k granules of 

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

 8 10 p diameter. 



Physarum 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 hypothallug is usually pale ochraceous and wrinkled. 

 Gregarious, sometimes becoming crowded, rarely 2 3 sporangia 

 supported on a common stem, from 1*5 2 mm. high. 



* Epispore smooth. 

 Physarum Carlylei, Mass. (figs. 240, 241). ?>**'" 



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

 nutely furfuraceous ; stem about equal in length to diameter 

 of sporangium, thick, rugulose, vermilion, expanding downwards 

 into a small wrinkled hypothallus ; 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 JA diameter. 



Grev., vol. xvii., March (1889). 



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



