(330) 
Cucurbiteae 
In the development of the pistillate flowers Bryonofsis dis- 
plays in its earliest stages the same features as those which 
characterize fevdllea. A lateral outgrowth becomes flat- 
tened at the end and soon the flat surface becomes concave. 
Almost as soon as the concavity is perceptible the origin of 
the parts of the floral envelope are manifest. Five lobes 
arise in an outer circle, and these lobes are alternate with five 
others in an inner circle. At this time inside of the inner 
circle of organs there is but a very slight concavity and no 
appearance of carpels or staminodia. 
In the formation of the placenta Bryonopszs resembles 
frevillea. Three ridges arise in the concavity and traverse 
its sides vertically at equidistant points. These ridges soon 
meet at the center and ultimately fill all the cavity except 
three narrow spaces running out from the center laterally. 
The placental folds simply come into contact but do not fuse. 
As growth proceeds in the placenta and in the outer tissue of 
the ovary itis retarded in those parts which might be con- 
sidered the bases of the longitudinally running ridges. The 
three radiating narrow spaces between the placentae now 
become expanded at the outer border so that the ovary in 
transverse section appears to be divided internally into three 
parts by radiating fissures with a T-shape extremity. This 
is the beginning of the formation of the free ovule-bearing 
edge of the placenta. These ovule-bearing edges lie in the 
angles of the T. This modification of the internal structure 
is confined to the central part of the ovary and does not ex- 
tend upward through the style. <A triangular passage-way 
is, however, maintained through the style to the stigma, thus 
providing an open stylar canal. 
he angular borders of the placenta soon show a con- 
densation of the protoplasm of their constituent cells, fol- 
lowed by the appearance of the ovules as slight swellings 
along the borders. nly one row of ovules is developed on 
each lobe of the placenta, so that in any transverse section of 
the ovary it would not be possible to find more than six ovules. 
