130 MISSOURI BOTANICAL GARDEN. 



Rosette leaves lanceolate or oblong-lanceolate, acutish, more 

 deeply notched at the long, tapering base, dark green and 

 shiny, sparingly mottled with red. 



Oenothera argillicola Mackenzie. 



MacDougal, Mutants and hybrids of the Oenotheras. (Carnegie Pub. 

 24:11. pi. 7). 1905. 



Flowers large, petals 4-i.5 cm. long (3-4 cm. long, Mac- 

 kenzie); stigma projecting from the unopened bud; buds 

 glabrous (no short hairs?) ; capsules glabrous, tapering. Ro- 

 sette leaves glabrous or nearly so, except the sparingly cili- 

 ate margins, broadly linear to linear-spatulate, sinuate; 

 petioles relatively stout. Stem very leafy; stem leaves 

 linear-lanceolate. 



The " glabrous " buds and capsules of 0. argillicola appar- 

 ently bring it nearer to 0. grandi flora than to any other form. 



Oenothera Simsiana Seringe. 



Oenothera corymbosa Sims, Curtis's Bot. Mag. 45. pi. 1974. 1818. 



Oenothera Simsiana Ser. PI. pub. with Acad. Intern. G6og. Bo- 

 tanique Bull. iii. 9. 1900. — Vail in " Mutations, variations and rela- 

 tionships of the Oenotheras." (Carnegie Pub. 81:68. pi. IS, 14). 

 1907. 



Flowers large, petals 4 cm. long, stigma surrounded by the 

 stamens in the bud; buds densely appressed-pubesccnt (long 

 hairs?); bud cone tapering only in terminal portion; erect 

 free sepal tips mostly unequal. Rosette leaves oblong to 

 obovate, gradually tapering to the broad petiole, Ught yel- 

 low-green; petiole white. Plant straggling in appearance; 

 stem leaves oblong-lanceolate to lanceolate, acute or acumi- 

 nate, coriaceous, very brittle, bright yellow-green, soon 

 turning red. 



Some of the hybrids between 0. Lamarckiana forms and 

 0. biennis, like 0. Simsiana have a short style so that the 

 anthers surround the stigma in the bud, but the petals are 

 smaller than in 0. Lamarckiami. 



Oenothera grandiflora Alton. 



Oenothera grandiflora. Barton, A flora of North America. 1. pi. 6. 

 Philadelphia. 1821.— Probably the most accurate plate. The slender 



