IOWA ACADEMY OF SCIENCE 
109 
The 0. grandiflora which was introduced into Kew from Alabama 
in 1760 differs from the Eastern form in a number of minor, tliough 
constant, characters, as shown by cultures. Among these differences 
may be mentioned, (1) in the Eastern form, as figured by Barton and 
as shown in cultures from near St. Anne ’s, England, the stem leaves, are 
much broader than in the present Alabama form of my cultures, though 
the leaves of both agree in being tapering and acute at both ends."^ (2) 
The dowers in the Eastern form are fully as large as in 0. Lamar ckiana, 
the petals being broad and overlapping in the opened flower, as in 0. 
Lamarckiana. In the Alabama form, on the other hand, the flowers (in 
my cultures) are considerably smaller and the petals are narrower and 
^ more cuneate, so that spaces occur between them in the expanded flower. 
(3) In bud characters’, the ^‘Eastern grandiflora/ ^ as determined from 
the English plants, bears on its sepals a short and inconspicuous type 
of hair, while the sepals of the Alaliama grandiflora are entirely glabrous. 
(4) On the other hand, the stems of the Eastern grandiflora are fre- 
quently almost free from hairs either of the long or short type, while the 
Alabama form bears, especially on its branches, many of the long hairs 
arising from papillae.^ (5) The “Eastern” plants average considerably 
larger than the Alabama ones. It is possible that some of these distinc- 
tions are due to environmental differences and are not permanently in- 
herited. 
Among the points in L’Heritier’s description of 0. grancUflora (which 
was evidently carefully written, using the Genera Plant arum as a model, 
though never published) which make it certain that it is this form and 
not 0. Lamarckiana which is described, are the words “folia ovato-lan- 
ceolata, utrinque acuta,” applied to the leaves of the stem. The term 
ovate-lanceolate has also been applied to the early descriptions of 0. 
Lamarckiana, but the stem leaves of O. Lamarckiana are not so broad as 
those of some races of 0. hiennis and 0. grandiflora. The stem leaves of 
0. Lamarckiana Ser., can not be described as acute at both ends, while 
this is perfectly true of 0. grandiflora. The width of the stem leaves, 
however, given as 3 inches, is exceptionallj^ broad. It is interesting to 
note that the cotyledons are described as deltoid-lanceolate. I have not 
observed the cotyledons of 0. grandiflora, but I have observed them in 
a form whose bud characters and other features show its close relation- 
ship to O. grandiflora. These cotyledons become characteristically del- 
toid-lanceolate. This is true, though apparently to a lesser extent, of 
iThe description of O. grandiflora by L’ Heritier (q. v.) shows that his (Alabama) 
plants had very broad leaves. It is therefore probable that both the broad and 
narrow-leaved races occurred in both the Eastern and Southern range of the species. 
Wor other data regarding the types of hairs and their inheritance in certain 
Oenotheras, see Cannon (1909). 
