VOLUME LIX NUMBER 1 
A Bi 8 
POTANICGAL GAZETTE 
FANUARY 1915 
THE MORPHOLOGY OF ARAUCARIA BRASILIENSIS 
Ill. FERTILIZATION, THE EMBRYO, AND THE SEED 
L. LANCELOT BURLINGAME 
(WITH PLATES I-III) 
Since the publication of the author’s account of the male 
(3a) and female (3b) gametophytes of Araucaria, certain additional 
facts have been observed. They will be recorded here by way 
of preface to the following account of the embryo and seed. 
In the paper on the male gametophyte the pollen was described 
as lodging on the ovuliferous scale and then growing over the sur- 
face to the micropyle, and a figure was given showing a number of 
pollen tubes. These pollen tubes were shown pursuing a more 
or less direct course to the micropyle. It was stated that they 
sometimes crossed from the upper surface of the scale on which 
they had germinated to the under surface of the scale above. 
Since that was written Eames has described the behavior of the 
pollen tubes of Agathis (8). The very interesting behavior of these 
tubes led me to re-examine those of Araucaria. It was found that 
while they do not, apparently, penetrate the tissues of scale and 
cone axis in the remarkable fashion characteristic of the sister 
genus, they do, nevertheless, branch much more profusely than 
had been supposed. It is often possible to separate a branching 
tube from the adjacent scales without breaking many of these 
branches. From this it appears that they are comparatively. 
superficial. There is usually one main branch of the tube that, 
goes more or less directly to the nucellus. From this numerous,, 
I 
