472 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
The stamens are always in two sets; a longer set of three on the 
anterior side of the flower, consisting of a pair opposite the lateral 
petal-segments, with a median one slightiy longer, opposite the 
lowest or anterior sepal-segment: the three short stamens 
of the posterior set. have the shortest one always opposite 
the upper blotched petal-segment, flanked by a longer one on 
either side opposite the lateral sepal-segments (гіс. 1); the stamens 
of this pair show about equal length in the short-styled flower, but 
in the long- and mid-styled flowers one is longer than the other, 
so that the three anthers of the shortest sets stand one above the 
other in the narrow tube in such a position that an insect’s pro- 
boscis would almost certainly graze all three when seeking the 
nectar accumulated in the basal portion ot the tube. The longer 
stamens would generally be described as inserted on the perianth 
tube about at the throat, but they may easily be traced as thickened 
ridges down to the base of the tube. 
The stigma of the long-styled form reaches a height of 12-13.5 
mm., averaging (in ten flowers) about 12.5 mm., and correspond- 
ing fairly closely with the height of the longest stamen of the 
mid-styled form, which is 13.5-15 mm., and also with that of the 
longest stamen in the short-styled form, which is 13-14.5 mm. 
The stigma of the mid-length-styled form reaches a height of 7-8 
mm., corresponding with the longest of the mid-length stamens 
of the long-styled form, whose anther stands about 9-10 mm. 
above the base of the ovary, and also with the mid-length stamens 
of the short-stvled form, whose median or shortest another stands 
6.5-8 mm. above the base of the ovary. The stigma of the short- 
styled form is only 2.7-3 mm. above the base of the ovary, and 
the shortest stamen of the long-styled form has the tip of its 
anther 3-3.5 mm. above the base of the ovary, while the anther 
tip of the shortest stamen in the mid-styled form measures 2.6-3 
mm. above the base of the ovary. . Measurements of all three 
stamens of the mid-length sets would show a closer correspond- 
ence with the mid-lenzth style, but it may be noted that the 
stamens of the shortest sets are all generally taller than the shortest 
styles. 
The ratio of the average height of the long pistils to that of the 
mid-length pistils is approximately as 100 to 60; and the average 
height of the long pistils to that of the short ones is as 100 to 22. 
T 
