1902) MICROSCOPICAL JOURNAL. 81 
form readily. -He has only observed them in H. teres on 
sterilized leaves of barley and of beer-wort. (Separate 
Zeitschr. f. Pflanzenk. 11: Heft 1). 
DISSEMINATION OF JEFFERSONIA AND PALLINATION OF 
Apios.—Hildebrand under the caption of Hinige biologi- 
sche Beobachtungen observes that the flowers of Jeffer- 
sonia diphylla are proterogynous, when the weather is un- 
favorable the flowers are cleistogamous. When the fruit 
is mature and the horizontal opening begins to form the 
capsule is erect, as the opening extends the capsule be- 
gins to bend at the base so that there appears a lid. 
When the capsule lies in a horizontal position the seeds 
fall from the upper portion of the placenta on the lower 
lip where they are easily carried by the wind. The cap- 
sule continues to bend from the horizontal position more 
and more downwards till it is entirely erect, and all seeds 
have dropped out. The fleshy arillus no doubt causes 
ants to carry the seed away. The seeds falling to the 
ground the end of July germinate in May, but sparingly, 
The cotyledons in germination remain in the testa. 
In the case of Apios tuberosa the author suggests that 
the reason why so few seeds are set is due to the peculiar 
mechanism of the flower. The insect must reach to the 
bottom of the flower. The wings on the right and left 
of the keel are used by the insect as a support but they 
never free the reproductive organs. The plant largely 
propagates by the underground tubers. (Berichte d. 
deutsch. bot. Gesellsch. 19: 472, 479). | 
ANATOMICAL CHARACTERS FOR SOME GRAMINEAE.—Theo. 
Halm’s anatomical studies of Gramineae and Cyperaceae 
are well known. His latest study: “Some new anatomi- 
cal characters for certain Gramineae” is an excellent con- 
tribution considering as it does the anatomical cbaracter 
of a large number of genera and species. The author 
describes the interesting occurrence of a double parenchy- 
