No. 547] GENET1CAL STUDIES ON (EN OTHER A 395 



To my surprise, with the appearance of the main stem 

 from the rosettes two classes of plants became at once 

 denned in the culture of these F, hybrids: Class I, repre- 

 sented by 12 plants with red glands on the ovaries and 

 the green portions of the stems, and Class II, repre- 

 sented by 168 plants in which the papillate glands simi- 

 larly situated lacked the red coloration. There were 

 apparently no intermediates, with respect to this char- 

 acter of gland coloration, between these two well-defined 

 types which usually differed in other respects, as noted 



below. 



The mature plants of the two classes could generally 

 be sharply contrasted with one another in the following 

 respects. 



Class I (12 Plants) 

 Papillate glands colored red on the 

 ovaries and green portions of the 



Mature plants (Fig. 6) symmetrical 

 in habit, collar at base of the long 



Lower leaves (Fig. 7) narrowly el- 



tions of the plant. " ? 

 Bud cones 4-angled. 

 Stigma lobes 6-7 mm. long. 

 Capsules about 3.3 cm. long. 

 Bracts persistent, developing on 



Class II (168 Plants) 

 Eed coloration absent from the 

 papillate glands on the ovaries 



straggling in habit, collar at base 

 spicuous. 



Lower leaves (Fig. 9) broadly el- 



We have said above that the two classes of plants 

 could usually be sharplv contrasted with respect to the 

 characters listed. There were found no exceptions as 

 regards the coloration of the glands, but with resect to 

 the other characters some variation was exhibited, espe- 

 cially among the large number of plants in Class II. For 

 example, the plant of the culture most resembling 

 (Enothera Lamarckiana (11.35La, to be described later) 

 was representative of Class II in all respects except that 



