AUSTRALIAN FUNGI. 
403 
2064. Didymium australis. Grev. xvn., 7. Mass. Mon. 237. 
Sporangium globose or slightly compressed, indistinctly umbili- 
cate, covered with a dense white layer of crystals of lime, which 
breaks away in patches ; stem elongated, erect, filiform, slightly 
thickened downwards, bright brown ; threads of capillitium colour- 
less, slender, variously branched ; spores globose, smooth, dingy, 
purple-brown, 10-11 y. diam. 
Gregarious. Stem 3-4 m.m. long ; sporangium about 2 m.m. 
broad x 1-5 m.m. high. 
On old Auricularia. Queensland. (Fig. 355.) 
2065. Didymium flavicomum. Mass. Mori. 212.=Physarum 
Berkeleyi. Rostf. Mon. 105. P. flavicomum. Berk. Hook. 
Journ. 1845, 66. Sacc. Syll. vii., 1193. 
Peridium hemispherical, umbilicate, rather violet or lilac; 
columella none ; stem elongated, straight, slender, attenuated 
upwards, rimose, gilvous or copper colour ; capillitium solid, with 
granules of lime, variable in size, gilvous-yellow ; spores pale 
violet, 8-1 1 ft, even. 
On rotten wood. W. Australia. 
Genus 13. SPUMARIA. Pers. 
-tEthalium complex, branching, each sporangium surrounded by 
an outer common cortex ; sporangia dendritic, covered on the out- 
side with small crystals of lime, with a central columella extending 
to the branches ; capillitium passing from the columella to the 
Walls, and, forming a thick net, cortex composed of empty cells, 
touching each other, snow-white. 
2066. Spumaria alba. Bull. Sostfi. Mon. 191, figs. 158,172, 
175. Sacc. Syll. vii., 1338. Mass. Mon. 256. 
Columella empty, cylindrical, branched, not reaching to the 
apex of the sporangium, threads of capillitium thick, formed into 
a thick network, very much thickened at the points of junction; 
spores dull-violet, very spinulose, 10-13 y. 
On grass. N.S. Wales. (Fig. 356.) 
Genus 14. DIACHJEA. Fr. 
Sporangium stipitate ; stem prolonged within the sporangium 
as a columella, and, together with it, filled with small granules of 
lime ; capillitium of threads extending from the rigid columella to 
the wall of the sporangium, becoming thinner and thinner, com- 
bined into a thick net. — Rtjki. Mon. 190. 
2067. Diacliaea leucopoda. Bull. Mass. Mon. 259. Rtfki. 
Mon. 190. Sacc. Syll. 1335. Cooke Myx. 44, fig. 178. 
=Diachtea elegans. Fries. 
Sporangia cylindrical, obtuse, stipitate ; stem short, thickened at 
the base, snow-white, prolonged within the sporangium into a 
cylindrical, obtuse, white columella, not reaching to the apex ; 
threads of the capillitium whitish, thin ; spores translucent, violet, 
eautifully iridescent, 7-9 y. diam. 
Gn leaves, etc. Victoria. (Fig. 357.) 
