Rhizostilbella rubra , a by-fruit form of Ascobolus parasiticus &C. 
241 
removed so astonishingly far from the Sclerotium state, viz: — by 
at least a month, so that, as through chance, one has no suspicion of it, 
one would never come to the conclusion that there was any connection. 
I have also found out the cycle of development of these forms only 
through persevering in the above mentioned systematic noting of the 
development of successive moulds in culture pans. 
May it not be possible that, following on the lines of this method, 
one also might be capable of elucidation some of the legion of Sclerotium- 
forms which are to be found in the mould world, of which next to nothing 
is known. 
To resume I have then in this treatise arrived at the result that 
Ascobolus parasiticus has three forms of habitus; they are: 
1 st the Ascobolus fruit form. Ascobolus parasiticus , 
2 nd the Conidia fruit form. Rhizostilbella rubra , 
3 rd the Sclerotium form. Sclerotium omnivorum. 
Explantation of the plate. 
Fig. 1. Rhizomorphes of Rhizostilbella rubra creeping over a piece of earth, and 
upward directed “conidian heads’. Magnified about 2 x. 
Fig. 2. Decayed fruit of Voandzeia subterranea with “conidian heads” of Rhizo¬ 
stilbella rubra which have broken through the fruit-wall. Magnified about 2 x. 
Fig. 3. The same as fig. 2, but with the fruit-wall removed, in order to 
demonstrate the rhizomorphes between fruit-wall and seedskin. 
Fig. 4. Branchlet of Voandzeia subterranea with rhizomorphes spirally creeping 
out over it. Magnified about 2 x. 
Fig. 5. Longitudinal section of a piece of the rhizomorph of Rhizostilbella rubra. 
Magnified about 50 x. 
Fig. 6. Longitudinal section of a conidian-head of Rhizostilbella rubra. About 50 x. 
Fig. 7. Section of the fruit-body of Ascobolus parasitiais. Magnified about 20 x. 
Fig. 8. Branched and unbranched paraphyses of Ascobolus parasiticus. About 80 x. 
Fig. 9. Ascospore of Ascobolus parasiticus. Magnified about 500 x. 
Fig. 10. Seed of Voandzeia with Rhizostilbella rubra and Ascobolus parasiticus 
in order to show the mutual relation of these two. 
Fig. 11. Young riceplant attacked by Sclerotium omnivorum . Natural size. 
Versuche über die Bedingungen der Holz- 
Ansteckung und -Zersetzung durch Merulius 
[Hausschwammstudien V]. 
Von C. W FILMER. 
(Aus dem Bacter. Laboratorium des Techn. - Chern,. Instituts der Techn. Hochschule 
Hannover.) 
Mit 1 Textfigur und 2 Tafeln Photographien. 
2. Die Ursache des Mißerfolges der Mycelimpfungen 1 ). 
Die früher geschilderten Ergebnisse 1 ) waren mir — wie ich offen 
gestehe — unerwartet. Lebende Hyphen des Merulius- Mycels vermochten 
1) Schluß von p. 321, 3, 1913/14, H. 7. 
Mycologisches Centralblatt, Bd. IV. 19 
