182 



Davis. 



reported by DE Tries. Throu|):hout the entire life history contrasting 

 differences are obvious as presented in the comparison outlined above. 

 Even in the youngest stages the cultures of the reciprocals can be 

 readily distinguished and from the time when the rosettes are half grown 

 the differences become very apparent. The-contrasts are well illustrated 



1/A 



X If It. -nuts 



Fig. 12. Mature plant of hybrid, muricala >( hiennis. Showing few (only one) side 

 branches from the rosette; a foliage of broadly -elliptical, almost plane leaves. Patro- 

 flinous in the form of the leaves which present, however, strong evidence of the influence 

 of the iiiuricala parent in being relatively not so long or so broad as those of biennis. 

 Compare witli Fig. 6, hiennis, and contrast with Fig. 13, biennis X muricata. 



by comparisons of the figures of corresponding stages of development (1) 

 cotyledons. Fig. 1; (2) young rosettes, Fig. 2; (3) mature rosettes, Fig. 10 

 compared with Fig. 11; (4) mature plants and foliage, Fig. 12 comjjared 

 with Fig. l.'J: (."i| inflorescence and foliage, Fig. 14 compared with Fig. 1.5; 



