DIDYMIUM.J 
DIDYMIACE^. 
103 
stipitate ; stems mostly connate at the base, tapering upwards, 
longitudinally wrinkled, white or cream-colour ; spores subglobose, 
black, 10 diam. 
Hah. On decaying fungi. — Portville, U.S.A. 
This brief description would apply to connate forms of either 
Physarum glohuliferum or P. compressum var. 8 ; but the shape of 
the sporangia is against its being reduced to P. polymorphum, as is done 
by Berlese (in Sacc. Syll., vii., p. 346). 
14. D. humile Hazslinszky in Oester. Bot. Zeitschr., xxvii., p. 84 
(1877). Sporangia applanate, grey, pruinose, slightly umbilicate 
above, deeply beneath ; stalk cylindrical, short, brown ; capilli- 
tium brown, of smooth, simple, flexuose threads; spores brown, 
6 to 7 /A. 
Hah. Hungary. 
This description applies to D. farinaceum var. minus. 
15. D. platypus Hazslinszky, I.e., p. 83 (1877). Sporangia 
greyish-white, prviinose, scattered, convex above, deeply umbilicate 
beneath ; stalk cylindrical, dilated into a disc at the apex ; 
columella none ; capillitium scanty, consisting of black threads 
combined into a net ; spores blackish, smooth, 8 jx diam. 
Hah. On rotten stalks. — Hungary, 
* 16. D. affine Raunk., in Bot. Tidsskrift, xvii., p. 88, t. v., figs. 
3 and 4. Sporangia spherical-hemispherical, stipitate. Stem 
thin, of equal length or longer than the sporangium, expanded 
into a circular hypothallus at the base, light brown ; wall grey 
under the microscope, after the lime has fallen away colourless. 
Columella globose or semi-globose, the colour of the stem, or lighter. 
Threads of the capillitium nearly hyaline, expanded into numerous 
shortly fusiform, brownish-violet swellings. Spores smooth or 
delicately warted, 8 to 9 /x, diam. 
Hah. On germinating seeds. — Copenhagen. 
This description appHes to pale brown stalked forms of D. effusum. 
17. D. longipes Mass., Mon., p. 236, fig. 226. Sporangia small, 
globose, snow-white, frosted with a few scattered granules or 
crystals of lime ; stem very long and slender, erect, snow-white, 
very slightly attenuated upwards, almost smooth, expanding at 
the base with a small circular white hypothallus; columella 
absent ; capiUitium well developed, threads very thin, colourless 
branching and anastomosing irregularly to form a network, nodes 
iisually triangular; spores globose, dingy lilac, smooth, 8 to 10 u 
diam. 
Hah. On bark and wood.— Britain (Yorks) ; South Carolina. 
Mr^M^ssee '^P^^^™®^ Herb, under this name as cited by 
