No. 397-] VZSITORS OF THE CAPRIFOLIJACEX. 5I 
WEIGELIA THUN. 
The eastern Asiatic species of Weigelia are often referred 
to Diervilla, but are regarded as distinct by Britton! An 
immense number of varieties have been produced in cultivation 
by selection and hybridization, which are remarkable for their 
wide range of coloration. There are white and deep-red forms 
with every intermediate shade; white when opening but chan- 
ging to rose ; deep red in bud but rose-colored in bloom ; flower 
pale rose at first, changing to deep red; yellow; light yellow, 
changing to white; pale yellow, changing to pale rose; and 
reddish-purple. The leaves are also frequently.highly varie- 
gated with yellow and white. 
Weigelia rosea Lindley. 
The trumpet-shaped flowers were observed by Müller in 
Germany to be visited by Osmia rufa L., 9, and also by 
Halictus leucopus K., 9, and H. sexnotatus K., 9. These 
small bees creep into the corolla tube, the mouth of which is 
8 to IO mm. in diameter, to obtain the nectar. They come in 
contact first with the stigma, which surpasses the anthers, and 
then with the pollen-covered anthers. The flowers are stated 
to be proterogynous, but not to the exclusion of self-fertiliza- 
tion. Knuth saw Bombus agrorum F., 9, frequently visit the 
flowers in his garden. There is not, however, sufficient room 
for the larger bees to enter the flower conveniently.? 
! Britton and Brown, ///ustrated Flora, vol. iii, p. 242. 
? Knuth, Handbuch der Blütenbiologie, Bd. ii, Nr. 1, p. 525. 
