THE SLIME MOLDS OF OHIO 
47 
Sporangia distinct, stalked or sessile. Capillitium consisting of free 
threads, called elaters, with pointed ends and marked by spiral bands 
either smooth or spinulose. Spores yellow, warted or reticulated. 
A. Sporangia sessile. 
B. Spirals of elaters three or more. 
C. Spores with border. 
D. Border 2mmm. wide. 
D. Border Immm. wide. 
C. Spores without border. 
E. Spores reticulated. 
E. Spores warted. 
B. Spirals of elaters two. 
A. Sporangia stalked. 
F. Elaters spinulose. 
F. Elaters smooth. 
G. Sporangia shining, yellow or brown. 
G. Sporangia dull, dark or black. 
1. T. favoginea 
2. T. persimilis 
3. T. scabra 
4. T. inconspicua 
5. T. varia 
6. T. erecta 
7. T. decipiens 
8. T. botrytis 
1. T. favoginea (Batsch) Pers. Sporangia crowded on a membra¬ 
nous hypothallus, obovoid, or globose, 0.6 to 0.7mm. in diam., j^ellow, 
sessile. Elaters long, even, yellow, 7 to 8mmm. in diam., with four or five 
spiral bands, smooth or spinulose; the spirals connected by light longitudi¬ 
nal ridges, the ends of the elaters conical, terminating in a smooth point. 
Spores yellow, prominently and coursely reticulated, giving a border 1.6 to 
2mmm. wide, 12 to 15mmm. in diam. 
Common on rotten wood. 
2. T. persimilis Karst. Sporangia crowded, on a membranous hypo¬ 
thallus, globose, 0.5 to 0.8mm in diam., dark yellow, shining, sessile. Elat¬ 
ers 6 to 8mmm. in diam., marked with four spiral bands, usually spinulose; 
the ends of the elaters conical, acute or with the spiral bands produced 
outward at the end into sharp divergent spines. Spores yellow, irregularly 
reticulated, giving a broken border 11 to 14mmm, in diam. 
Common on rotten wood. 
3. T. scabra Rost. Sporangia crowded upon a membranous hypothallus, 
globose, 0.6 to 0.9mm. in diam., orange yellow or brown, shining, sessile. 
Elaters long, 4 to 6mmm. in diam., bright yellow, marked by four or five 
spinulose spiral bands; the ends conical, acute, or with the bands produced 
into slender divergent points at the ends. Spores yellow, closely reticulated, 
without a border, 9 to 12mmm. in diam. 
Common. 
4. T. inconspicua Rostafinski. Sporangia crowded or gregarious, 
subglobose, 0.5 to 0.6mm. in diam., dull red-brown, sessile. Hypothallus 
absent. Elaters long, simple or branched, slender, 3 to 5mmm. in diam. with 
four or five distinct and regular spiral bands; often swollen behind the 
