[65]

shoots thin & flexible

Clematis calycina. March 18 64

It might have been expected from the small leaves that it wd not have been a leaf climber. An old leaf with peduncle is 2 1/2 in. long, & is flat. When young the terminal portion of the peduncle is bowed downwards so that the leaf is slightly hooked. The leaf consists of 3 leaflets. the whole peduncle is sensitive to a piece of string but apparently not to thread; old leaves are not sensitive. Each leaflet is deeply divided but the midrib is not sensitive.

Mar 21. Rubbed on lower side terminal portion of peduncle of two very young leaves: in 2° 30' slightly but decidedly

[65v]

curved downwards & in 5° from commencement terminal part bent parallel to basal part. In 4° afterwards had become nearly straight again. I marked these 2 leaves by a touch of paint on lower side of basal peduncle & these 24° afterwards were much curved down, apparently not from the touch as there was no movement 9° after but from the minute crust of paint.

Several young flexible shoots carrying the above described

[65b]

sensitive leaves revolved in broad ovals with the sun. One shoot taking 5° 30' another at the same time 6° 12'. If these shoots do not twine which I didn't believe, case is odd, for I doubt whether the very young leaves are hooked enough to catch any object. Does not twine (?) but leaves rest laterally against stick when brought by movement against stick & then catch — When a tendril sticks, it bends but these leaves are stiff enough to resist & anchor plant

The leaves strike laterally against vertical

[65bv]

stick, & seize it beautifully

May 4th Sometime takes 2 spiral turns then run straight up or in reversed spire.

The main & terminal peduncles which have mostly firmly clasped stick have become twisted & twice as thick & very strong & cells look swollen.— In Ampelopsis only definite swelling & change of colour. The gain of strength is wonderful, in main peduncle— far more than twice, I cd hardly break, whereas corresponding uncaught leaf quite brittle — Change in swelling very prompt.—

(When plant grown larger the leaves have 2 lateral pairs of leaflets, of which, of course peduncles are sensitive.)