badhamia] physaraceae 39 



■ ' 



and confluent warts and ridges, 10 to 15 fi diam. — Rost. Mon. 

 p. 145, figs. 108, 109; Macbr. N. Am. Slime-Moulds, 65. Phys- 

 arum lilacinum Fr. Syst. Myc., iii. 141 (1829). P. continuum 

 Mass. Mon., 308 (1892). Craterium lilacinum Mass. I.e. 271. 



PI. 13.— a. sporangia ; b. capillitium and spores ; c. spore ; (Pilmoor, Yorks). 



Prof. Macbride describes this species as common in the eastern 

 U.S.A. In Britain it appears to be less frequent, though the small 

 pink sporangia when maturing among grass and moss on open ground 

 may easily escape detection. 



Hab. On dead wood, twigs, Sphagnum, etc. — Pilmoor, Yorks (B.M. 

 1190); Arisaig, Scotland (B.M. 2084); Germany (B.M. 488); New 

 York (B.M. 1191). 



16. B. rubiginosa Rost. Mon., App. p. 5, fig. 115 (1876). 

 Plasmodium bright yellow. Sporangia obovoid, stalked, rarely 

 sessile, 0'5 mm. broad, rufous, or purplish-brown, usually 

 paler above, the upper part of the wall breaking away in 

 fragments from the more persistent lower part ; sporangium- 

 wall purplish, membranous, more or less charged with granules 

 of lime. Stalk cylindrical or widening at the base, usually 

 about the length of the sporangium, smooth, purplish- 

 brown, continued within the sporangium to more than half 

 its height as a pale clavate or cylindrical columella. Capil- 

 litium a white or pale rufous rugged network, usually densely 

 charged with linie-granules, spreading from all parts of the 

 columella to the sporangium-wall, sometimes with a few 

 hyaline connecting threads. Spores dark purplish-brown, »3S"m 

 minutely spinulose. — Macbr. N. Am. Slime-Moulds, 70. 

 Physarum rubiginosum Chev. Fl. Paris, i. 338 (1826). Scyphium 

 rubiginosum Rost. Mon., p. 148 (1875). Craterium rubiginosum 

 Mass. Mon., 270 (1892). Didymium Curtisii Berk, in Grew, 

 ii. 65 (1873). Badhamia Curtisii Rost. Mon., App. p. 5. 

 B. subaquila Macbr. N. Am. Slime-Moulds, 64. Craterium 

 Curtisii Mass. Mon., 272. Craterium obovatum Peck in Rep. 

 New York Mus., xxvi. 75 (1874). 



Var. 1. — dictyospora Lister: sporangia obovoid; spores 

 marked with prominent more or less confluent warts, or 

 reticulated. — Badhamia dictyospora Rost. Mon., App. p. 4. 

 Craterium dictyospermum Mass. Mon., 270. 



Var. 2. — globosa Lister in Journ. Bot., xlii. 130 (1904): spor- 

 angia subglobose, 0-7 mm. diam., purplish-grey ; stalk dark 

 brown, 0-5 to 1 mm. long ; columella dark brown, clavate ; 

 spores strongly reticulated and warted. — Diderma Hookeri 

 Berk, in Hooker Fl. Nov. Zel., pt. 2, 191 (1855) ? Lumpro- 

 derma Hookeri Rost. Mon., App. p. 24 (1876) ? Diachaea 

 Hookeri Mass. I.e. 260 ? Chcndrioderma Hookeri Lister 

 Mycetozoa, 85 (1894) ? 



PI. 14.— a. sporangia; b. spore; (Philadelphia); c. sporangia of var. dictyospora ; 

 d. e. capillitium and spores of same ; (Epping Forest); /. sporangia of var. globosa ; 

 g. spore of same ; (N. Wales). 



c2 



