184 



Davis. 



the parents. Mature plants are not so large or so stocky. Fewer 

 flowers come to bloom and the flowering season is much shorter. The 

 flowers average much smaller than the mean of the parents. Sterile 

 anthers are ver}- common and the output of pollen is very much re- 



-m.u.rt.c.o,t:a. 



Fig. 14. Inflorescence of hybrid, muricata X biennis. Strongly matroclinous in the 

 bracts projecting beyond the younger buds. At the right is a leaf from near the base 

 of the main stem, patroclinous in form but showing the influence of the muricata parent 

 in being irregularly toothed. Compare with Fig. 8, biennis, and Fig. 9, muricata, and 

 contrast with Fig. ].">, biennis ,■:. muricata. 



duced. The capsules give a very small yield of seeds. Many of these 

 points are noted by DE Vries who also reports the cross biennis X 

 muricata to be extremely susceptible to a rot caused by Botrytis, which 



