Geneti^al Studies on (knolhcra. V. 



183 



(6) buds, Fig. 16. Only in flower structuie as HE Vries has reported, 

 are differences between the reciprocals difficult to determine. The flowers 

 of my cultures have presented such wide variations in size and relations 

 of parts that I have been unal)le to distinguish constant contrasting 

 characters worthy of note. 





Fig. 13. Mature plant of hybrid, biennis ;< muricata. Showing absence of side branches 

 from the rosette; a foliage of narrow elliptical, revolute or keeled leayes. Patroclinons 

 in the form of the leaves which present, hoTvever, evidence of the influence of the 

 biennis parent in being relatively somewhat longer and broader than those of muricata. 

 Compare with Fig. 7, muricata, and contrast with Fig. 12, murirala )< biennis. 



A striking feature of the reciprocal crosses is the diminished vigor 

 expressed thi'oughout their entire life histories. Young rosettes are 

 smaller than those of the parents of corresponding age. Mature rosettes 

 are markedly smaller and fail to send up numerous side shoots as do 



