T he N atural H ybrid between the Cowslip & Ox lip. 16 5 
£ 
P 
Text-fig. 6. Transverse section of the flower-scape of the Cowslip. 
Lettering as above. 
The two scapes can thus be very easily recognized in transverse 
section. With regard to the structure of the scape in the various 
hybrids, it is found that the Cowslip has handed on its characteristic 
scape-structures to its hybrid with the Primrose, perhaps owing to 
the fact that the Primrose is practically acaulescent. For a similar 
reason no doubt the internal structure of the scape of the hybrid Oxlip 
Primrose shews all the characteristics of the true Oxlip. But 
in the Cowslip x Oxlip hybrid, where both parents have scapose 
umbels it is of interest to notice that the Oxlip stem-structure is 
dominant over that of the Cowslip, for the narrow band of thick- 
walled sclerenchyma is as well developed as in the Oxlip itself 
(cf. Figs. 1-4). 
