12 MYXOMYCETES. 



sometimes '01-*014 mm. diam ; colouring variable, yellow, golden- 

 yellow, orange, or ferruginous; now and then veinlike short plas- 

 modiocarp. Rtfki. Mon., 99. 



On leaves of Sphagnum, &c. 



var. a genuiniim. Stem yellow, sporangium yellow or greenish- 

 yellow, 1 mm. wide ; spores '007 -'008 mm. ; granules of 

 lime pale-yellow. 



(3 chrysopus. Stem and sporangium alike coloured gold- 

 yellow, 1 mm. diam.; spores, .01 mm.; granules of lime 

 gold-yellow. 



y aurantiacum. Spores orange, stem brown; sporangium 

 Tj-mni diam. ; spores -Oil nim. diam. ; granules of lime brown. 

 <$ rufipes. Sporangium yellow or orange, now and then beau- 

 tifully lustrous, stem orange- red ; granules of lime yellowish, 

 e compactum. Plasmodiocarp veinlike, creeping, short, yellow 

 or golden-yellow, without columella, vanishing with the 

 stem. 



Physarum citrinum, Schum. Saell., 1,436 (1803). 

 Physarum aurantiacum /? rvfipes, A. & S. Cons., 262 (1805). 

 Physarum verrucosum, Link. Herb. 

 Physarum compactum, Khr. Syl. Ber., p. 21 (1818). 

 Physarum Schumachen, Spr. Sys. iv., 528 (1827). 

 Diderma citrinum, Fr. S. M. iii., 100 (1829). Cooke Hdbk., 

 No. 1107. 



Diderma rufipes, Fr. S. M. iii., 101. 



Diderma compactum, Wallr. Herb. 



Physarum chrysocephalum, Wallr. Herb. 



Physarum aureum /3 chrysopus, Lev. Ann. Sc. Nat. (1816), p. 166. 



PhysammjlawmjFckl. Sym., p. 343 (1869). 



3. Physarum. leucopus. (Link.} 



Sporangia globose, oval, or a little flattened, stipitate, together 

 with the stem snow-white, scarcely ^ mm. high, now and then 

 standing upon a common hypothallus ; stem of variable length, 

 sometimes almost obsolete, straight, rigid, brittle, attenuated 

 upwards, very much plicate lengthwise, without columella ; capilli- 

 tium strongly developed, containing numerous angular irregular 

 granules of lime of variable size ; spores spinulose, 095-'0116 

 mm. Rtfki. Mon., p. 101. 



On dead wood, &c. 



Didymium leucopus, Link. Diss. 2, p. 42 (109). 

 Physarum bullatum, Link, Diss. 2, p. 42 (1809). Ditinar. t. 22. 

 Physarum albopunctatum, Link. Herb. 



Didymium leucopus, Fr. S. M. iii., 121 (1829). Eng. Fl. v. 313. 

 Cooke Hdbk., No. 1127. 

 Physarum ramentaceum, Fr. in litt. ad "VYcin. (1836). 



