GAMOPETALA 163 
aérial stems are all flowering scapes. The leaves are 
radical with a reddish petiole, the leaves having a de- 
current margin, oblong, obovate, or ovate toothed, 
wrinkled, downy beneath, tapered below, the margin 
revolute, undulate. The midrib is hollow above, 
keeled below. 
The flowers are pale yellow, single, erect. The 
tubular calyx is angular, the teeth subulate, incurved 
above. The corolla is tubular. The styles vary in 
length. 
The Primrose in flower is 6 in. in height. The 
flowers bloom from March to May. 
The flowers are dimorphic, there being a long-styled 
and a short-styled form. The stamens are united to 
the corolla above the stigma in the short-styled form. 
The pistil is longer than the stamens, and is as long 
as the tube in the long-styled form, the stamens being 
half-way down, the stigma dilated, filling the mouth 
of the corolla, whilst in the short-styled form the 
stigma is half-way down the tube. An insect visiting 
a long-styled form is covered with pollen at half the 
distance of the tube, whilst in the short-styled form it 
becomes dusted just opposite the entrance. 
The two forms are found on different plants, there 
being about an equal number of each, the long-styled 
being pollinated with pollen from the short-styled 
forms owing to the above arrangement. In the 
former the stigma is rough and globular, depressed 
in the latter, and in the long-styled forms the pollen 
is smaller. 
