62 Transactions British Mycological Society. 



the typical robust alpine kind than we usually get in England. 

 The var. iridescens appeared at Oxshott and Weybridge on 

 bramble leaves and stems in October. 



19. P. sinuosum Weinm. The plasmodium of this species may 

 be found fresh and preparing to fruit at least at two periods of 

 the year, in March and October, particularly on bramble but 

 also on the dead leaves of the horse-chestnut, sweet chestnut 

 and beech. 



20. P. bitectum Lister is common throughout the year on 

 the same habitat as the preceding. It has been recorded from 

 January to April and from July to October. A very striking 

 and puzzling timeless form was frequently met with in April 

 1922 and 1923 at Weybridge and Horsley. The sporangium wall 

 was shining iridescent, reticulated, with angular ridges and the 

 spores were very dark and rough. It occurred on poplar and 

 elder bark, but more usually on dead leaves especially those of 

 sweet chestnut, beech, laurel and oak. 



21. P. contextum Pers. and 22. P. conglomeratum Rost. are 

 apparently rare and have only once been recorded in Surrey 

 in November 1898 and September 1897 respectively, when Miss 

 Margaret Phear found them on dead leaves at Witley. 



f 23. P. mutahile Lister was found abundantly on straw heaps 

 near Witley in August 1905 and by Mr J. Saunders at Haslemere 

 in 1914. It is by no means of frequent occurrence. 



•[•24. P. virescens Ditmar var. nitens Lister. The only Surrey 

 record of this species was made by Miss Lister at Haslemere in 

 October 1905. It occurs on dead leaves, moss, etc. 



25. FuUgo septica Gmel. is of common occurrence from May 



to October. It has been found on oak, beech, poplar, elm, pine, 



laurel, hornbeam, fir, bracken, grass and moss and on living alder. 



var. Candida Lister. Favours sawdust heaps of coniferous 



wood. 



var. rufa Lister prefers beech and elm: the plasmodium of 

 this variety is sometimes a pale cream colour almost white, 

 but more often it is rich canary yellow. It has been observed 

 in June, after six weeks drought, emerging from an apparently 

 bone dry elm stump. The presence and thickness of the cortex 

 depend on the atmospheric conditions prevailing at the time 

 of development. Plasmodium maturing in sheltered situations 

 produces no cortex ; but in the open the outer sporangia wither 

 and form a protection for the deeper layers. 



I26. F. muscorum Alb. and Schw. flourishes on moist moor- 

 land in autumn. Two gatherings of this species have been made 

 in Sept. 1905 at Haslemere and Morley Common on rushes, 

 bracken and sticks. 



*2y. F. ci7terea Morg. Towards the end of July 1920 a fine 



