174 
Jager * thought they were of insect origin. 
Woronin?+ considered the fungus to be closely related to 
Nageli’s genus Schinzia. This genus was founded upon a fungus 
which pierced the root rind of various species of Tris, and pro- 
duced flask-shaped bodies at the ends of the threads in the cellst. 
Magnus considered it too different from Schinzta cellulicola 
to be placed in the same genus.§ : 
An article by A. Gravis || entitled, *‘ Observatione anatoml- 
ques sur les excroissances des racines de |’aune” induced Woro- 
nin to make additional researches upon young galls of Adnus. 
The condition of the organism he found here bore such a resem- 
blance to his Plasmodiophora Brassica * that he communicated to 
Gravis his belief that two organisms were frequently present, of 
a Plasmodiophora \ike Myxomyeete, and the other a filamentous 
fungus. Gravis communicated this in ‘“ Note sur les excrols- 
sances des racines de l’aune.?” 
E. Warming ¢ notes the presence of galls on Hippophoe, Ela- 
agnus and Shepherdia which resemble those on A/nus, and fe- 
cords the discovery of what he considers a parasitic Myxomycete 
of like nature with Woronin’s Plasmodiophora. 
H. Moller§ in his earlier studies of these galls used only 
alcoholic material, and probably for this reason overlooked the 
real nature of the fungus. He claimed to have demonstrated 
*Ueber eine krankhafte Verinderung der Bliithen Organe der Weintraube, 
Flora, 1860, S. 49. Quoted from Woronin. 
+ Mem. d. l’Acad. Imp. d. Sciences, VIIe, Tome X., No. 6, 1866, St. Peters- 
burg. 
} Flora, 1842, p. 278. See Sorauer, Pflanzenkrankheiten, Bd. I., p. 743: 
§ Sitzungsberichte des bot. Ver. d. Prov. Brandenburg XXI., June 27, 1am 
Quoted in Sorauer, Pflanzenkrankheiten, Bd. I., p- 748. 
| Bulletin de la Société royale de Botanique de Belgique, Tome XVUL., oe 
partie, p. 50-60. See Berichte der Deutschen Botanischen Gesellschaft, Bd. ILL, 
1885, p. 177. 
* Pringsheim’s Jahrbiicher Bd. XI, , 1897: : d 
+ Compte rendu de la séance mensuelle du Jan. 10, 1880, de la Société royale ¢€ 
botanique Belgique. See Berichte der Deutschen Botanischen Gesellschaft Bd. it. 
1885, p. 177. 4 
¢ Smaa biologiske ogmorfologiske Bidrag. Botanisk Tidsskrift, 3dei Rakke, Be. 
I,, 1876, p. 84. Reference ‘* Wurzelknéllchen bei den Elzagneen, Just’s Jabresbe- 
richt, 1876, p. 439. 
§ Plasmodiophora Alni, Berichte der Deutschen Botanischen Gessellschatt, Bd. 
III, 1885, p, 102-105, 
