Manito eBooks

The two terminal leaflets in the daytime include rather less than a
right angle; but their divergence increases greatly whilst they
* I am informed by Mr. Dyer that Mr. Bentham believes that C. floribunda (a
common greenhouse bush) is a hybrid raised in France, and that it comes
very near to C. laevigata. It is no doubt the same as the form described by
Lindley ('Bot. Reg.,' Tab. 1422) as C. Herbertiana.
[page 370]
sink downwards and rotate, so that they stand laterally at night, as may be
seen in the figure. Moreover, they move somewhat backwards, so as to point
towards the base of the petiole.
Fig. 154. Cassia corymbosa: A, plant during day; B, same plant at night.
Both figures copied from photographs.
In one instance we found that the midrib of a terminal leaflet formed at
night an angle of 36o, with a line dropped
[page 371]
perpendicularly from the end of the petiole. The second pair of leaflets
likewise moves a little backwards, but less than the terminal pair; and the
third pair moves vertically downwards, or even a little forwards.


Pages:
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622