B® to : : 
— setminate in copper sulphate (1 :1,000) in twenty- 
| Pounds ahi 
containing mercury, copper, iron, 
- Pound 
< pe : 
containing oxygen, sodium, 
] Biology of the Uredinee. 451 
re 
te 
re MEDIUM. STRENGTH. RESULTS. 
} [Sn I yen emer 
19 | Potassium bi-chromate i 
i e. I Fairly well. 
: —"? sulphocyanide. 10 Five spores germinated. 
A oul cree I A few spores germinated. 
% Cope t sulphate I Very few spores germinated 
a he oh sublimate o.¥ | A few spores germinated. 
sium bi-chromate. I Success, but not very free: swells 
: t 
: ue nitrate. I Physi 1 
i Sie acetate I Six spores germinated. 
‘ a kad sulphate. I Success , 
otassium chromate. 10 Success. 
a 
oS ala 
ee petions of other species were not sufficiently exten- 
0 justify tabulation. Acidium Fraxini Schw. failed 
and in potassi ; six hours, 
ia. ae bi-chromate (1:1,000) same time, but ger- 
66, oy in the latter solution with a strength of 
ilustratior producing peculiar short bulb-like germ tubes, for 
tof su n of which, see pl. XXXVU, fig. 6. Quite a num- 
dines .. spore-forms, including various aecidia and ure- 
to ten germinated more or less freely in weak solutions (five 
ave .. cent.) of sugar and honey. In only one instance 
Vredo Sih able to grow the spermatia. The spermatia of 
1893, copabaldddied Schwein. budded sparingly, 
ut would areety tout hours in a dilute so ution 
of the res “a germinate in water. This 1s in oe 
A eh : Eevraice y Cornu? and Plowright.” disk 
Certain ut comparison of the results above justil 
conclusions of interest and import Com- 
lea 
firmation 
(w 
I S . . . 
» are inimical to. the growth of 
sul 
Pur and probably carbon and ammonium, in ii 
wth of Uredine®- (3) Alk- 
Portio 
. Ns, are favorable to the gro ; The com- 
aloid rs 
S are injurious to the crowth of Uredine&- 
under group 
*Bull, 
PBiligh ts Soc. de Bot. de France xxi ( 1876). 120-121. 
redinez and Ustilaginex, 14-19- 
