48 MISS M. F. EWART ON 
seems to be correlated with the great development of the labellum, 
and in this ease, when the median petal assumes a simple form, 
the anther is found to be well developed. 
Again, according to Masters, ‘‘Cases of partial irregular 
peloria in Cypripedium are not very uncommon ; as, for instance, 
flowers in which the lateral petals (or one of them) assume the 
saccate form of the lip. This may occur without any increase in 
the number of parts.” 
Various instances are also mentioned in the paper by Masters 
already quoted in which the two lateral sepals were distinct, as 
here, and in which the median petal was intermediate between a 
labellum and an ordinary petal, or even became quite simple 
in form. 
The modified flower here described is still zygomorphic, and 
the plane of symmetry still passes through the petal corre- 
sponding to the labellum in other forms and through the sepal 
(here much reduced) which is opposite to it. 
II. Monstrous FLrower oF CypripepiIuM Boxattt. 
This flower presented a very strange appearance owing to the 
reduction and irregularity of its labellum. A sketch of the 
whole flower,as seen from in front, is given in Pl. I. fig. 7. The 
sepals and lateral petals were quite normal and well developed. 
The labellum, however, was very much twisted and contorted, 
and appeared to be much more reduced than was actually the 
case, in consequence of certain infoldings. The upper dorsal 
surface of the labellum had become attached to the lower part of 
the stigmatic surface (0, fig. 7), so that there were two small 
openings into the cavity of the labellum, one on either side of 
the adherent portion, instead of the usual single median 
aperture. 
The column carried two fertile stamens, and the staminode 
was perfectly normal, except that it was slightly turned to the 
left away from the median vertical plane. 
Only the upper part of the stigmatic surface was visible 
(a, fig. 7), since the upper fold of the labellum (c) was firmly 
adherent to the central portion of the stigma, and thus com- 
pletely hid its iower portion from view. 
In order to discover the nature of this attachment of the 
labellum to the stigma, I cut through the column vertically a 
little to the left of the median plane. Fig. 8 represents a view 
