SOME SEGREGATES OF OENOTHERA. 



135 



length, usually smooth and free from crinkling. Stem leaves 

 smooth, standing out rather straight from the stem, narrow 

 and more or less furrow-shaped. Buds may be greenish, or 

 with a red color pattern as in 0. ruhrinervis. 



Oenothera brevistylis DeVries. 



Die Mutationstheorie. 2 : 430. /. 80, flower; 2 : 431. /. 5^, flowers; 2 : 431. 

 /. 8S, parts of flowers; 2 : 434. /. 84, whole plant; 2 ; 434. /. 85, fruits. 



Rosette leaves rather broader than in 0. Lamarckiana, 

 with very broad, obtuse, rounded tips. Bracts of ^ terminal 

 rosettes broader and more rounded at tip than in 0. La- 

 marckiana. Style very short, usually not projecting above 

 the calyx tube. Sepal tips very short. Buds may have a 

 red color pattern, as in 0. ruhrinervis. 



Oenothera oblonga DeVries. 



See under 0. Lamarckiana. Die Mutationstheorie. 1 : 163. /. 64, flower- 

 ing shoot; 1:200. /. 50, whole plant; 1:239. /. 71, flowering stem; 

 1:244. /. 74, young rosette: 1:321. /. 100, fruits; 1:384. pi. 6, 

 colored. 

 Rosette leaves smaller than in 0. Lamarckiana, oblong 

 with rounded tip, much crinkled, with a long, broad, unmar- 

 gined petiole. In my cultures, 0. ohlonga has appeared at 

 various times, especially from crosses, but I have never been 

 able to rear it beyond the rosette stage. 



Oenothera albida DeVries. 



See under 0. Lamarckiana. Die Mutationstheorie. 1 : 192. pi. 3, colored ; 

 1 : 248. /. 75, 76, young rosettes; 1 : 320. /. 99, fruits. 



Rosette leaves whitish. Young rosette otherwise very 

 much as in 0. oblonga. Capsules small, with few seeds. 

 Flowers pale yellow. Stems somewhat zigzag and very 

 brittle. 

 Oenothera leptocarpa DeVries. 



Only distinguishable in the adult stage from 0. Lamarck- 

 iana, from which it differs in beginning to bloom later in 

 the season, and in having few branches. The leaves are like 

 those of 0. Lamarckiana, but closely clothe the stem. The 

 capsules are long and thin. 



