[148]

Flora 1879 Dr Carl Kraus "Beitrage zur Kenntniss der Bewegungen &c p. 11.

p. 42 the quantity of water absorbed influences greatly position of periodically moving organs by night & day

p. 43 thinks this cause chiefly determines position of leaves of Polygonum convolvulus, which according to Batalin opens leaves in evening — The appearance very variable & often differs in different individuals.

p. 70 about Cannabis. — seeming to sleep by bending down — sentence unintelligible. —

Preliminary remarks about doubtful cases

Used Ch IV p. 372

[Movement in plants, p. 318: "Carl Kraus has also lately insisted† on the great influence which the quantity of water absorbed has on the periodic movements of leaves; and he believes that this cause chiefly determines the variable amount of sinking of the leaves of Polygonum convolvulus at night; and if so, their movements are not in our sense strictly nyctitropic.
† 'Beiträge zur Kentniss der Bewegungen,' etc., in 'Flora,' 1879, pp. 42, 43, 67, etc."]