l6 MUTANTS AND HYBRIDS OF THE OENOTHERAS. 



The individuals of the hybrid as made in the New York Botanical 

 Garden in 1903 were seen to be furnished with narrower leaves in the 

 earliest stage of the seedlings, all of which but one were destroyed by 

 insects before the main axis was formed. The plant was recognizable 

 at some distance throughout its entire existence by its light yellowish- 

 green color. The leaves of the young rosettes were ovate-lanceolate, 

 obscurely and remotely repand-denticulate, blunt at the apex, with the 

 laminae extending down the petioles to the bases in the form of wings 

 1 to 2 mm. in width. (Plate XII.) 



The leaves of the mature rosette were narrowly lanceolate-oblong, 

 being broadest above the middle and tapering to both ends, with the 

 petioles winged. The laminae were approximately denticulate in the 

 apical portion and irregularly so in the basal half. All of the leaves 

 of the rosette and stem were minutely pubescent. 



The stem attained a height of about 55 cm. and bore a number 

 of short, spreading branches arising from the base of the main stem 

 and reaching half of its length. Numerous shorter branches arose 

 from the entire stem from a short distance above the base. The 

 apical portions of all branches were tinged with red. The stem leaves 

 were narrowly oblong-lanceolate, tapering to both ends and acute at 

 both ends; 9 to 11 cm. long, and 14 to 17 mm. wide. The terminal 

 rosettes were dense, close, symmetrical, and spreading. The first 

 flower was shown on August 12, about six weeks later than the begin- 

 ning of the blooming of either parent. 



The petals were recurved after the manner of 0. cniciata and were 

 from 9 to 1 1 mm. long, varying from linear-oblong to irregularly 

 obcordate or truncate, being entire, obscurely emarginate or irregu- 

 larly notched near the apex. Furthermore, these various forms might 

 be illustrated in a single flower (see Plate XII, figs. 6a, ya, and 8). 

 The definite tips of the calyx-segments were spreading in the bud and 

 were 3 to 15 mm. long. The stamens varied in length, being 

 shorter than the pistils in some flowers, and longer in others. The 

 ovaries were about 9 mm. long, slightly hirsute, and the hypanthium 

 was glabrous. The bracts were lanceolate-acuminate. The calyx- 

 segments were much shorter than the hypanthium. The hypanthium 

 showed a purplish tinge and the petals were flesh-color, except at the 

 tips. The capsules were rounded, obscurely angled, 20 mm. long 

 and 4 to 5 mm. in thickness, tapering from near the base to the tip, 

 and bearing a few spreading hairs. (PI. X.) 



This hybrid agrees quite well with 0. critciata varia as described 

 by De Vries, which he thought was a hybrid between muricata and 

 cruciata. Whether it is actually identical with this form can not be 



