760 



JOUKNAL OF THE EOYAL HORTICULTURAL SOCIETY. 



Anisophylly, Contributions to our Knowledge of. By E. 



Heinricher {Ann. Jard. Bot. Buit. 3rd supp. 2nd pt. 1910, pp. 649- 

 664; 6 plates). — Several new cases of anisophylly (i.e. unequal leaves 

 developed on the two sides of an obliquely-growing shoot) are reported 

 in this paper. The tropical species Oreocnida major Miq., Mallotus 

 florihundus Muell, Macaranga tomentosa Wight, Pangium edule 

 Reinw., and Hevea hrasiliensis Muell, are first dealt with. The 

 author then adds some further remarks to his former account (1907) 

 of the occurrence of a rare case of anisophylly in the mistletoe. The 

 concluding section of the paper is occupied with an interesting descrip- 

 tion of the unequal development of leaves on the two sidles of plants of 

 Sempervivum. If plants of Sempervivum, growing on the side of a 

 sloping bank facing west or south, be observed it will be seen that the 

 upper leaves of the rosette — viz. those lying highest on the bank — are 

 considerably larger than the lower leaves. Heinricher 's experiments 

 indicate that the inequality in the size of the leaves depends upon their 

 uneven illumination. He does not believe, however, that light, as such, 

 is the active factor in evoking the phenomenon, but that the heat which 

 accompanies the light is the true cause. The upper leaves (and the 

 ground around them) are much more warmed by the direct insolation 

 than the more shaded lower leaves, and thus the growth of the.form.er 

 is favoured. — R. B. 



Antirrhinum, A Giant (Rev. Hort., March 1, 1910, p. 100).— 

 Description of a giant Antirrhinum which was gi.ven to the Botanical 

 Gardens in Upsala as having originated from a seed of a plant of 

 ordinary size. The first season it reached a height of about 4 feet; 

 but, having been preserved in a cold-house during the winter, it reached 

 a height of no less than 11 feet the next season, with exceptionally 

 large flowers of a deep reddish-purple. — C. T. D. 



Aphis Wash Formulas Recommended. By M. E. Zacharewicz 



(Pom. Frang. Feb. 1910, p. 55). — Summer treatment, appHed prefer- 

 ably in miorning. — Soft soap 3 kilos., dissolved in 25 litres boihng 

 water; paraffin 2 litres, poured slowly into the preceding solution; 

 water to make the total 100 litres. Wmter treatment, at end of January. 

 — Soft soap 1 kilo., paraffin 4 litres, sulphate of copper 1 kilo, to 

 100 litres of water; mix as previously recommended. — C. H. H. 



Apiculture, The Status of, in the United States. By E. F. 



Pliilhps, Ph.D. [U.S.A. Dep. Agr. Bur. Entom., Bidl. 75. pt. vi-. 

 Jan. 25, 1909). — The bulletin deals largely with the sources of loss to 

 the bee-keeping industry, and the necessity for scientific and economic 

 research. 



Of the former, contagious diseases demand most attention, although 

 swarming, winter loss, and waste of wax are important items which 

 nnist not be overlooked. 



The author considers tliat agricultin-o as an industry is benefited 

 only by the making of expert bee-keepers iiiinncially inierested in tlie 



