200 END09POREAE [LYCOGALA 



angled by mutual pressure, 0-4 to 0-7 mm. diam., rusty-brown, 

 shining iridescent ; sporangium-walls membranous, smooth. 

 Capillitium scanty, consisting of slender rusty-brown branching 

 and anastomosing threads and strands with thin membranous 

 expansions. Spores subglobose or turbinate, rusty-brown, 

 sharply and closely reticulated on two-thirds of their surface, 

 faintly and loosely reticulated on the remaining third, 6 to 

 10 /x diam. — Torrend Fl. Myx., 121. Reticularia lobata 

 Lister Mycetozoa, 161 (1894). R. Eozeana Lister in Journ. 

 Bot., xxix. 263 (1891) non Rost. 



PI. 154. — d. clustered sporangia (England); e. capillitium; /. spores. 



This species appeared in four successive years on a Spanish chestnut 

 stump in Wanstead Park, Essex ; it has also been obtained from near 

 Woking, Berks, from Bedfordshire, Staffordshire, and Shropshire, 

 from Argelees in the Pyrenees, and from Portugal. Gatherings made 

 by Dr. Torrend on old willows, near Lisbon, show that the sporangia 

 do not unite to form true aethalia, as they appear to do in some of the 

 Wanstead specimens ; in a few cases they are quite free, and may even 

 be seated on slender stalks or strands of hypothallus. In spite of its 

 small size and occasional free sporangia, L. lobata appears to be hardly 

 more than a simple form of Enteridium Rozeanum ; the spores of the 

 two species are indistinguishable. 



Hob. On dead wood. — Wanstead, Essex (B.M. 3197) ; Leighton, 

 Beds (B.M. 1449) ; Pyrenees (B.M. 2829) ; Portugal (B.M. 2830) 



Order V. — Lycogalaceae. 

 Sporangia forming an aethalium ; pseudo-capillitium con- 

 sisting of smooth or wrinkled branching (17) Lycogala. 

 ^ colourless tubes. 

 ||i|& V;l This order contains the single genus 

 |PP^ Byl'- \ Lycogala . 



g^d^vV \A* Fig - * 5 - — Lycogala epidendrum Fr. 



' J •" TVw «• Three aethalia. Natural size. 



«ii5 JSSl^'^V'" ~f * - Capillitium. Magnified 150 times. 



J-^- ^*\tS^^\N^, fdt e Spore. Magnified 600 times. 

 Fig. 45. ' j 



Genus 37.— LYCOGALA Adanson Fam. PI., ii. 7 (1763). 



Aethalium subglobose or conical, with a cortex consisting of two 

 or more closely combined layers of different structure ; the 

 outer layer is provided with large cell-like vesicles, which are 

 either embedded or superficial ; it is traversed by inter- 

 lacing double-walled tubular threads that penetrate the 

 homogenous inner layer at numerous points, their inner walls 

 being continuous with the tubes of the pseudo-capillitium ; 

 the latter are grey or colourless, of wrinkled or nearly smooth 

 branching tubes, attached to all parts of the cortex, with 

 numerous rounded free ends. 



The Plasmodium of Lycogala epidendrum first rises from the wood 

 as a group of small coral-red papillae, which as they grow unite to form a 



