physarum] physakaceae 67 



Dr. C. Torrend among dead twigs appears to be intermediate between the 

 type and var. lividum ; the sessile globose sporangia have firm but single 

 walls, and the lime-knots are rather angular, while the spores are 

 dark brown and traversed by a band almost free from warts. Another 

 gathering by Dr. Torrend, from Cintra, resembles typical P. didermoides 

 in all respects except that the stalks are cylindrical and charged with 

 white lime-granules throughout. (Compare P. testaceum Sturg., p. 79.) 

 Hob. On dead wood, leaves, or old straw. — Bedfordshire (B.M. 

 2175); Somerset (B.M. 2176); Hampshire (B.M. 2177) ; Lyons, France 

 (B.M. 432) ; Germany (B.M. 2178) ; Sweden (B.M. 2180) ; Portugal 

 (B.M. 2179) ; Cameroons (Herb. Dr. Jahn) ; Ceylon (B.M. 420) ; 

 Java (B.M. 2181); Japan (B.M. 2182); Iowa (B.M. 809); Ohio 

 (B.M. 1242) ; North Carolina (B.M. 998) ; Brazil (B.M. 2184) : var. 

 lividum— Bedfordshire (B.M. 1696) ; Portugal (B.M. 2183). 



34. P. nutans Pers. in Usteri Ann. Bot., xv. 6 ( 1795). Plas- 

 modium watery white, or yellowish-grey from the presence of 

 foreign matter. Total height 1 to 1-5 mm. Sporangia stalked, 

 erect or nodding, subglobose or lenticular, more or less flattened 

 or concave beneath, 04 to 0*7 mm. broad, white, greyish- white, 

 or violet-grey, gregarious ; sporangium- wall membranous, with 

 included minute white granules in more or less dense clusters. 

 Stalk subulate, longitudinally wrinkled, grey, yellowish, 

 olivaceous or black, translucent above, sometimes opaque and 

 white from deposits of lime in the wall, the tube of the stalk 

 containing refuse matter but not lime. Capillitium consisting of 

 slender colourless threads, brandling at an acute angle and 

 anastomosing, with few flat expansions at the axils and few 

 small white lime-knots. Spores clear brownish- violet, nearly 

 smooth or minutely spinulose, 8 to 10 fx diam. — Pr. Syst. 

 Myc, iii. 128. Sphaerocarpus albus Bull. Champ., 137, t. 407, 

 fig. 3, t. 470, fig. 1, a to g (1791). Stemonitis alba Gmel. 

 Syst. Nat., 1469 (1791). P. bulbiforme Schum. Enum. PI. 

 Saell., ii. 200 (1803). P. albo-punctatum Schum. I.e., 200. 

 P. Didymium Schum. I.e., 202 ? P. marginatum Schum. 

 I.e., 202 ? P. Pini Schum. I.e., 203. P. solutum Schum. 

 I.e., 204 ? P. furfuraceum Schum. I.e. P. albipes Link in 

 Mag. Ges. Nat. Fr. Berl., iii. 27 (1809) ? P. sulcatum Link 

 I.e., 27 ? P. connatum Ditm. in Sturm Deutsch. FL, Pilze, 83, 

 t. 41 (1817)? P. gracilentum Fr. I.e., 133 (1829). P. cernuum 

 Fr. I.e., 130. Trichia nutans Trentep. in Roth Catal. Bot., i. 

 227 (1797). T. cernua Schum. I.e., 211. Didymium marginatum 

 Fr. I.e., 115. D. furfuraceum Fr. I.e., 116. Tilmadoche cernua 

 Fr. Summ. Veg. Scand., 454 (1849). T. nutans Rost. Mon., 

 p. 127 (1875) ; Mass. Mon., 327. T. Pini Rost. I.e., 128. T. 

 gracilenta Rost. I.e., 129 ; Mass. I.e., 330. T. anomala Mass. 

 I.e., 333 ? T. alba Macbr. N. Am. Sliine-Moulds, 58 (1899). 



Subsp. leucophaeum Lister : sporangia usually erect, 0-5 

 to 1 mm. diam., stalked, sessile or forming plasmodiocarps ; 



