MUTANTS AND HYBRIDS OF THE OENOTHERAS. 21 



being distinctly paler in the terminal parts, which were of a yellowish - 

 green color. All of the stems and branches were terminated by tufted 

 rosettes. The following characters were exhibited by the flowers 

 (PI. XVII, fig. 5): 



Petals 27 to 31 mm. long and 27 to 33 mm. wide, deeply emargi- 

 nate ; calyx-segments 30 mm. long, being more than half the length 

 of the hypanthium, which was 48 mm. in length, slender, and gla- 

 brous, except for a few scattering hairs; ovary 12 mm. long, glabrous, 

 except for a few scattered hairs ; stamens nearly as long as the 

 pistil. The capsules were 29 to 32 mm. long, 6 to 7 mm. in thick- 

 ness, being about four times as long as broad, distinctly four-angled, 

 and shallowly channeled ; oblong and narrowed in the apical region ; 

 sparingly appressed pubescent. This type was noted as producing 

 perfect seeds in apparently smaller numbers than the other types of the 

 hybrid, although some branches bore several well-filled capsules. 

 (PI. XV, fig. 2.) 



(IV) A fourth type was represented by individual No. 2.32, 

 which was not recognized in the rosette stage, although the leaves 

 are much narrower than in 0. biennis, and are not so deeply toothed 

 in the basal portion. The aspect of the adult plant (PI. XIV, fig. 2) is 

 very marked, however, and it is easily recognizable. The lateral 

 branches are numerous and nearly as long as the main axis, with the 

 stems deeply channeled. The larger leaves of the rosette are narrowly 

 oblong-lanceolate and yellowish-green, with prominent reddish mid- 

 veins. The stem leaves are lanceolate and broadest about the middle 

 and deeply toothed. The entire plant is pubescent and shows a tinge 

 of reddish color even when young, which becomes much intensified 

 with age. (PI. XIV, fig. 2.) 



The bracts are oblong-ovate, the hypanthium longer than its seg- 

 ments ; the petals are about 20 mm. long and 24 mm. wide, with wedge- 

 shaped bases. The stamens, pistil and petals are about of the same 

 length. The green capsules are about 26 to 27 mm. long and 6 to 7 mm. 

 thick, oblong, tapering from near the base to the narrow apex, and 

 shining green, being only sparingly pubescent. The general outline of 

 the capsules is irregular ; in cross-section they appear distinctly four- 

 angled. (PI. XVI, fig. 3.) 



Seven individuals of this type were brought to maturity and all 

 conformed, with only minor divergences, to the above structures. 



The hybrid progeny in the cultures made in the New York Botanical 

 Garden and in Amsterdam was thus seen to include a series of types 

 which ranged, in the aggregate of characters included, from those 



