*"y 
1887. , 
ro BOTANICAL GAZETTE. 87 
2 . . 
: ys iapelanaa of teachers who give laboratory instruction 
1e exceedingly easy way in which an unlimited 
supply of materi i 
= Able em was provided for this study. A thoroughly 
porcelain dish three inches in diameter and a quarter 
th rj 1 
aan wees speaks of only two nuclei, one of 
tt hin oa a y larger than the other. 
Shai d SR ae 3 7 
Baswer. 3 fe otis but two nuclei. 
“a8, pod oer later works, the larger is called t 
. ith the case in hand the nuclei are all of nearly 
equal si i i 
qual size, As a rule they pass out into, the tube early in 
d in the lower 
nt, 
When only 
one was fre- 
he vegetative 
may undergo a 
t of the pollen 
wo nuclei were 
ir slender tips, 
plate. 
f teachers of physiological bot-. 
his Newe Unter- 
oe 
['Stras a aaewececcan 
fuehiengen hens describes and figures pollen grains with three nuclei in 
2 ne 
3 . peg s Physiological Botany, p. 428. 
‘ . spores of Tradescantia Virginica. 
88 of Fertiiization in Campanula Americana. 
- 
Bort. Gaz. XI, p. 10. 
Bor. Gaz. X, p- 349. 
