342 BOTANICAL GAZETTE [NOVEMBER 
When the two male cells are equal, it is commonly inferred that 
both function. So far as could be determined, only one male cell 
functions in’ Phyllocladus, and the second male cell, together with the 
other three nuclei discharged into the egg cell from the pollen tube, 
disintegrate as the proembryo develops, as shown in jig. 26. ARNOLDI 
(I) finds in Cephalotaxus that the second male cell remains in the 
upper end of the egg and later goes through a mitotic division. 
The Taxineae are equally divided in regard to the size of the 
male cells. In Torreya taxifolia they are unequal (CouLTeR and 
LAND 9); they are also reported unequal in Taxus by BELAJEFF (3), 
and by JAGER (13); ARNOLDI reports them of the same size in Ceph- 
alotaxus (1); and they are equal in Phyllocladus. Outside of the 
Taxineae they are equal in Juniperus communis (Nor£N 17), Thuja 
(LAND 15), Sequoia (ARNOLDI 2), Pinus Banksiana (COULTER 11), 
and Pinus Laricio (CHAMBERLAIN 6). Miss FERGUSON (12) finds 
them unequal in Pinus Strobus; and one functioning male cell is 
Teported in Podocarpus by CoKER (7). LAND (13) finds in Ephedra 
trijurca that the male cells are equal, both enter the egg, but only one 
functions. 
Ovulate strobilus 
The ovulate strobilus occurs on the side of the phylloclad (in the 
axil of a scale leaf) near its base (fig. 12). It usually occurs sing ys 
but frequently in pairs; never more than one pair was seen upon @ 
single phylloclad. The strobilus consists of six to eight rather fleshy 
scales, each scale bearing a single ovule in its axis. 
The ovule has two integuments, entirely free from the nucellus 
to the very base. The inner one is very thick and consists of tas 
layers: an inner fleshy, a middle stony, and an outer fleshy SR 
of only two layers of cells. The stony layer begins to develop is of 
micropylar end and extends toward the base. At first it consists 
only one layer of cells, but later it becomes much thicker and extends 
all the way around the base of the ovule, where, however, it seit 
much thinner than at the micropylar end. ‘The inner fleshy th 
1S Somewhat crowded out by the growth of the stony layer; and “as 
Outer fleshy layer is finally sloughed off. ‘The integument contains 
vascular strands; these end at the base of the ovule (fg. 15); ve 
tains a number of resin ducts, shown in the cross-section in fig. 16 
