ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 429* 



explains the use of the ash by the natives of Australia for mixing with 

 Pituri, — the dry leaves and twigs of Dubosia Hopwoodi, for mastication. 

 The effect of the alkali is to liberate the alkaloid piturine, the physio- 

 logical action of which has been shown by Langley and Dickenson to 

 be identical with that of nicotine. Dubosia belongs to the natural order 

 Solanaceae. 



Bobzi, A. — Produzione d'indolo e impollinazione della Visnea Mocanera L. (Pro- 

 duction of indol and pollination of VUnea Mocanera.) 



[An account of the experiments made to determine the nature of the un- 

 pleasant scent which attracts hies to the inconspicuous flowers of this plant r 

 and of the methods employed to demonstrate that the odoriferous substance 

 belongs to the indol group.] 



Atti. R. Accad. Line. Roma, xiii. (1904) pp. 372-5. 



King, Sir G., & Gamble, J. S. — Materials for a Flora of the Malayan Peninsula 

 — continued. 



[Contains an account by Mr. Gamble of the few species belonging to the order 

 Caprifoliacese which have been collected in the Malay Peninsula and 

 adjacent islands ; and a joint account by the authors of those species of 

 the order Rubiaceae which have more ovules than one in each cell of the 

 ovary.) Journ. Asiatic Society Bengal, lxxii. (1903) pp. 112-229. 



Pantanelli, E. — Studi sull' albinismo nel Regno Vegetale. IV. Sul turgore delle 



cellule albicate. (Studies on albinism in the vegetable kingdom. IV. On the 



turgidity of the colourless cells.) Malpighia, xviii. (1904) pp. 97-105. 



Pizzetti, M. — Sulla localizzazione dell' alcaloide nel Nuphar luteum Smith e nella 

 Nymphsea alba. (On the localisation of the alkaloid in Nuphar luteum, and 

 Nymphxa alba.) 



[The alkaloid is protective, and occurs more or less in all parts but the seed.] 



Malpighia, xviii. (1904) pp. 106-9. 



Schaffner, J. H. — Ohio plants with extra-floral nectaries and other glands. 



[A review of the various kinds of extra-floral glands known to occur on Ohio 

 plants, with a list of the plants on which they occur, and suggestions as to- 

 their use.] Ohio Naturalist, iv. (1904) pp. 108-0. 



CRYPTOGAMS. 



Pteridophyta . 



Structure of Leaves of the Bracken Fern in Relation to En- 

 vironment.* — L. A. Boodle gives the -results of his observations on 

 the structure of the leaf of the bracken in different natural habitats. 

 He finds that in dry exposed situations the leaves are xerophytic and 

 have a hypoderm, while in well sheltered and shaded habitats they show 

 the characters of delicate shade-leaves, having no hypoderm, and either 

 weakly developed or no palisade tissue. This range of structure may be 

 shown by different leaves on the same plant, or by different parts of the 

 same leaf when opposite external conditions are sufficiently localised. 

 A plant grown first in a damp green-house and then in the garden, pro- 

 produced shade-leaves in the former and sun-leaves in the latter. The 

 leaves developed in the green-house showed reduction of the indusia. 



* Journ. Linn. Soc. (Boh) xxxv. (1904) pp. 659-69 (figs, in text). 



