Fig. 1. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
ON ABNORMAL CYPRIPEDIUM FLOWERS. 
EXPLANATION OF PLATES I. & Ul. 
Prats I.—Cypripedium Sedent. 
The modified flower, from the front. 
p,. Median petal. 
Py Ps. Lateral petals transformed into labella. 
8, 8,. Lateral sepals (distinct). 
. The modified flower, postero-lateral view. 
s,. Median sepal, here fused with a bract, 5. 
f, b,. Floral bud and subtending bract, next youngest in age to 
the modified flower. 
Other letters as in fig. 1. 
Ovary with attached bract, &c., from the front. 
b. Bud seen through the lamina of the attached bract, which has 
been rendered semitransparent by spirit. 
c.b. Outer border of bract formed by the overlapping edges of its 
lamina. 
e. Bifid extremity formed by the apex of the bract and by the 
apex of the fused median sepal, s,. 
Side view of column, after removal of perianth. 
an. Anther. 
st. Stigmatic surface. 
Semi-diagrammatic view of the ovary and attached bract, the anterior 
part of the lamina being partially removed in order to show the contents 
of the lower chamber in situ. 
6. Flower-bud subtended by the attached bract. 
c'. Its ovary cut across, 
6,. Younger flower-bud ; s’, its subtending bract. 
a. Apex of the floral axis. 
Front view of the column, after removal of the two labella. 
8,. The median sepal, forming the upper chamber. 
View of complete flower, from the front. 
a. Upper part of stigmatic surface. 
6. Part of stigma to which the labellum adheres. 
ce. Adherent portion of labellum. 
Upper part of column, cut through vertically a little to the left of the 
middle line to show insertion of labellum. 
a, b, c, as in fig. 7. The downgrowth of the labellum is seen in 
the opened canal. 
Prats II.—Cypripedium Boralli. 
Diagrammatic view of flower, cut in half longitudinally. The sepals 
and lateral petals have been removed, and the labellum with its down- 
growth is shown in outline. 
b, c, as in figs. 7 and 8. 
The figures (1). .. . (6) represent transverse sections of the flower taken at the 
levels correspondingly numbered in fig. 9. 
