1893.] The Organism of Leguminous Tubercles. 231 
in the tubercles of lupines. He as well as Eriksson47 showed 
that two types of structure existed, one represented by the 
tubercles on lupine, and the other by those on peas, etc. 
Schindler,** Tschirch, #9 Benecke,*®® Van Tieghem and 
Duliot,** and Sorauer®? supported Brunchorst’s view. 
Tschirch even went farther and considered the fungus hyphz 
to represent nothing but preliminary stages in the differentia- 
tion of the cell plasma into bacteroids. Lecomte? consid- 
ered that both the hyphe and bacteroids were receptacles for 
the storage of albuminous material. Tschirch** calls the 
tissue in which the bacteroids are found ‘‘bacteroid tissue.” 
out this time in a preliminary paper®® and later 
due to a fun u 
Thus the question hung, 
as it were, in the balance at the 
tose of what might be ter 
med the middle period of investiga- 
But important contributions were soon 
to be “st : 
eee which would remove all doubt of the causal 
Ip of the soil organisms to the tubercles. 
"'Studier : 
(1874) > taba’ Leguminosernas rotkneelar. Lund. 1874. Bot. Zeit. xxxv 
“Weher die h.1,_.- 
sctea, Jour, 1 plogische Bedeutung der Wurzelkncellchen bei den Papilion- 
Ueber di GW. xxx (1885), 
® Berlin, por paurzelkncelichen der Leguminosen. Gesells. Naturw. Freunde 
Usher die Knoaty ene. XH! (1887.) 
88>), 53. neellchen an den Leguminosen-Wurzeln. Bot. Centralb. xxix 
Bites, Bull. d Soe vature morphologique des tubercles radicaux des Légu- 
tmensteti Bot. France, xxxy (1888), 
a als Bakterj “pla neuern Arbeiten tiber die Wurzelknzllchen und 
Pie 308, 8€sprochene Inhaltskcerperchen, Bot. Centralb. xxxt 
“tres c Soc. Bot. q France. : 
Death Bot. dig pais, der Wurzelknolichen der Leguminosen. Ber. d, 
Be i pe Wurzelanschwel] 
ungen d i ? 
ca Bot. Gesells. y (i887). Erlen und Elzagnaceen Pilzgallen 
sata, (1880), oan den Wurzeln von Alnus und den Elzagnaceen. 
; an i8¢ Warzelansc wel jen von Alnus 
"Blea, hwellun iejeni ae 
U _ungen, besonders diejenigen va 
| Aters. Bot. Inst. Tubingen. 11 (1886). ist. 
