30 m.; but in the figure here given (Fig.
102), its circumnutation is shown during only 21 h. 30 m. During part of
this time (viz., 14 h. 30 m.) the phyllode described a figure representing
5 or 6 small ellipses. The actual amount of movement in a vertical
direction was .3 inch. The phyllode rose considerably between 1.30 P.M. and
4 P.M., but there was no evidence on either day of a regular periodic
movement.
Fig. 102. Acacia retinoides: circumnutation of a young phyllode, traced
from 10.45 A.M. July 18th to 8.15 A.M. 19th. Apex of phyllode 9 inches from
the vertical glass; temp. 16 1/2o - 17 1/2o C.
(11.) Lupinus speciosus (Leguminosae).--Plants were raised from seed
purchased under this name. This is one of the species in this large genus,
the leaves of which do not sleep at night. The petioles rise direct from
the ground, and are from 5 to 7 inches in length. A filament was fixed to
the midrib of one of the longer leaflets, and the movement of the whole
leaf was traced, as shown in Fig. 103. In the course of 6 h. 30 m. the
filament went four times up and three times down.
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