CHAP. IV. 



DICOTYLEDONS. 



247 



(20.) Allamanda Scliottii (Apocynese, Fam. 144). The young 

 leaves of this shrub are elongated, with the blade bowed so much 



Fig. 110. 



Cyclamen Persicum : circumnutation of leaf, traced from 6.45 A.M. June 2nd 

 to 6.40 A.M. 5th. Apex of leaf 7 inches from the vertical glass. 



downwards as almost to form a semicircle. The chord that 

 is, a line drawn from the apex of the blade to the base of the 

 petiole of a young leaf. 4f inches in length, stood at 2.50 P.M. on 



