Vol. i No. ii 



TORREYA 



November, 1901 



DUPLICATION OF CONTRIBUTIONS ON PHYSI- 

 OLOGY OF TENDRILS 



By D. T. MacDougal 



The author of this note spent some time in making observations 

 and experiments upon the tendrils of Entada scandens, the West 

 Indian filbert, in the Botanic Gardens at Bath and Castleton, 

 Jamaica, in the summer of 1897, and some additional anatomical 

 work was carried out in the laboratory later in the year. A 

 brief note containing the chief results of the experiments was 

 read before the Indiana Academy of Science, December 30, 1897, 

 and a detailed account of the entire investigation was published 

 in the Bulletin of the Torrey Botanical Club in 1898 (25 : 65-72. 

 /. A-F), under the title of " Contribution to the Physiology 

 of Tendrils." 



By reference to the accompanying figures, which were omitted 

 from the original paper it may be seen that the tendrils of En- 

 tada are the transformed terminal leaflets of the large bipinnate 

 leaves. The tendrils are extremely sensitive over their entire 

 surfaces, and curve to the most delicate touch, and the efficiency 

 of this pair of grasping organs is far greater than that of any 

 single tendril, due in part to their rapid action and to their com- 

 bined mechanical "superiority. The detail of the structure and 

 action of these organs is given in the article cited. 



Dr. Haberlandt has recently published in pamphlet form a 

 lengthy treatment of tendrils and other sensitive organs under 



[The exact date of publication of each issue of Torreya is given in the succeed- 

 ing number. Vol. I, No. 10, comprising pages 113-124, was issued October 26, 

 I 901.] 



