Nos. 455-456.] NOTES AND LITERATURE. 



A comprehensive biological account of the island of La Mocha, by 

 Reiche and others, forms No. i6 of the Anales del Museo Nacional de 

 Chile. 



Notes by Bessey \w Science oi July 22 show that each plumed akene 

 of Taraxacum weighs on an average .00044 g"i-) and that a medium 

 sized tree of Populus deltoides bears not far from 28,000,000 seeds, 

 of an average weight of .00065 g™- each. 



An interesting paper on the adventitious epiphytic occurrence of 

 terrestrial plants in Norway has been distributed by Holmboe from 

 No. 6 of the current volume of the Christiania Videnskabs-Selskabs 

 Forhajidlingar. 



The thermotropism of Rhododendron is described and illustrated 

 by Johnson in Country Life in America for November. 



A prehminary paper on electrotropism of roots, by Plowman, is 

 published in The American Jourtial of Science for August and Sep- 

 tember. 



A popular account of carnivorous plants, by Shreve, is contained 

 in The Popular Science Monthly for September. 



A new and enlarged edition of Pammel's " Flower Ecology " has 

 been published from the J. B. Hungerford Press of Carroll, Iowa, 

 under the title "Ecology." Seventeen chapters deal with the chief 

 topics. 



Professor Kraemer has issued separates of a paper on the origin 

 and nature of color in plants from Vol. 43 of the Proceedings of the 

 American Philosophical Society. 



A note on the pollination of Calepogon pulchellus is published by 

 Klugh in The Ottawa Naturalist of August. 



A syllabus of the economic plants of the temperate zones repre- 

 sented in the Dahlem garden is given by Engler in Appendix 14 of 

 the Notizblatt des K. botanischen Gartens und Museums zu Berlin. 



A key to the genera of the forest trees of Indiana, based chiefly 

 upon leaf characters, by Coulter and Dorner, has been issued by the 

 authors from Lafayette, Ind. 



Under the title " Getting Acquainted with the Trees," a tasty and 

 beautifully illustrated little book by McFarland has recently been 

 issued by The Outlook Company, of New York. 



