186 REPORT OF THE CONFERENCE ON GENETICS. 
stamens had quite disappeared. In some a single stamen and in others 
two stamens were present. ‘'T'hey differed from the previous set, in that 
they were not so very tall, and the fasciation was absent. Some of the 
flowers had a few carmine spots in the throat. Humble-bees were fond 
of the flowers. They pushed their heads well into the tubes to reach the 
honey. The flowers were not found to be pierced as in the former 
series, 
LF ww 
Fic. 33.—Inriorescences oF (a) Digrranis PURPUREA ALBA x D. LUTE, 
(6) D. tuTEA x D. PURPUREA ALBA. 
The plants of the series having D. lutea as the pollen-parent were equally 
vigorous with those of the reciprocal series. They were easily distinguished 
by the flowers (fig. 33 a) being considerably larger, and ofa different form 
and colour. The mouth of the flower was much wider and the tube more 
capacious. ‘The colour was almost always a very light rose-purple ; in many 
cases, however, the tinge of red disappeared, leaving the colour almost the 
same asin the other series. Carmine spots occurred in the corolla. They 
varied greatly in number and position. A few occurred on the lip, but 
the great majority appeared in the tube near the mouth. The stamens 
were with few exceptions all present, and to outward appearance normal. 
