SOME SEGREGATES OF OENOTHERA. 131 



rounded bud and delicate sepal tips are well represented. The sten» 

 leaf in /. 2 is also correct for O. grandiflora, but too broad for 

 0. Lamarckiana. — Vail in " Mutations, variations and relationshipa 

 of the Oenotheras." (Carnegie Pub. 81 : 66. jpl. 11, 12). 1907. 



Usually in cultures a loose rosette of few leaves, or in some 

 cases no rosette at all. Especially when grown in conditions 

 of high temperature and humidity, a much better rosette is 

 formed and the later rosette leaves have a prominent series of 

 basal lobes on each side of the midrib, easily distinguishing 

 them from those of any of the 0, Lamarckiana or 0. biennis 

 derivatives. The stem leaves are usually larger and broader 

 than in 0. Lamarckiana and largely free from crinkHng. 

 Flowers large, about 7 cm. in diameter when open; style- 

 long, protruding the stigma beyond the anthers and prevent- 

 ing pollination before the bud opens; buds smooth with a. 

 small amount of pubescence of short hairs; sepals thin and 

 papery, often wrapped more or less diagonally around the 

 bud: buds slender and rounded owing to thinness of sepals^ 

 and less prominence of the longitudinal median ridge of the^ 

 sepals; sepal tips usually long and very slender. These bud 

 characters easily tlistinguish it from 0. Lamarckiana. Redi 

 glands on stem present or absent. 



Oenothera Lamarckiana Seringe. 



Oenothera biennis. Sowerby's English Botany. 22. -pi. 1534. ISOG.— 

 Probably O. Lamarckiana rather than O. grandiflora, but sepal tips not 

 well represented. 



Oenothera grandiflora Sims, Curtis's Bot. Mag. 46. pi 206S. 1819-— 

 Petals less strongly emarginate and much less cuneate than in this 

 figure. 



Oenothera biennis var. grandiflora Lindl. Edwards' Bot. Register. 19, 

 pi. I6O4. 1833.— Probably O. LamarcHana. Leaf (probably a rosette 

 leaf or one of the lower stem leaves) much too narrowly lanceolate 

 for O. grandiflora; sepal tips also too short and stout. 



Oenothera Lamarckiana. Floral Mag. 2. pi. 7S. 1862.-The reddish 

 buds and stem suggest O. rubrinervis. 



Oenothera Lamarckiana Lemaire.— Illustration Horticole. 9. pi 318.. 

 1862.— Copied, reversed, from the Floral Magazine. 



Oenothera Lamarckiana Ser. DeVries, Die Mutationstheorie. 1 : 213.. 

 / 55, whole plant; 1:227. /. 61, flowering shoot; 1 : 228. /. 62, ro- 

 sette leaf; 1:229. /. 61,, young rosette; 1:230. /. 66, very young, 

 rosette; 1 : 320. /. 99, fruits; 1 : 153. /. l^, flower nat. size; 1 : 169.. 



