530 



JOUENAL OF THE EOYAL HOKTICULTURAL SOCIETY. 



buds, those injuring the leaves, and those injuring the fruit. Means of 

 preventing their attacks are also given. (See also " Insects.") — F. J. C. 



Architects and Gardens. By H. P. G. Maule {Garcl Mag. 2,486, 

 p. 391 ; 22/6/1901). — A paper read before the Architectural Association. 

 It deals chiefly with the relation of the architect's work and the garden, 

 a subject that has often before given rise to discussions. The paper 

 deserves perusal by those interested in the subject. — W. G. 



Arctotis Gurabletoni, I^ook. fil. By Sir J. D. Hooker {Bot. 

 Mag. tab. 7796). — Nat. ord. CompositcB ; tribe Arctoticle(B. Native of 

 Namaqualand. Stem and pinnately-lobed leaves tomentose. Flower 

 heads 3 inches across, bright orange, with four united red-brown streaks 

 at the base of the corolla. — G. H. 



Arctotis Species, Reizbare GrifFel v. zwei. By M. von Minden 

 (Flora, vol. Ixxxviii. Pt. 2, pp. 23H-242 ; March 1901).— .4rc^o/is aspera 

 and A. calendulacea, garden plants from S. Africa, have styles which are 

 irritable to contact, bending over to the side touched. — M. H. 



Arctotis stoechadifolia (grandis). {Gard. Chron. No. 763, 

 p. 108, fig. 34; 10/8/1901). — A dwarf shrubby composite, stems and 

 leaves covered with a grey down. The latter are in form so-mewhat like an 

 oak-leaf, but much larger ; the Daisy-like flowers are about four inches 

 in diameter ; the ray florets are whitish shaded with lilac. It was intro- 

 duced in 1799, but had dropped out of cultivation until quite recently. 



G. S. S. 



Asparagus as an Ornamental Plant. By H. R. Hayle (Gard. 



Chron. No. 753, p. 341 ; 1 6 1891). — The names and descriptions of the 

 best species for decorative purposes are given. — G. S, S. 



Asparagus Rust (U.S.A. Exp. St. Hatch, Report 12, 1900-1). 



— The principal feature emphasised in these experiments is, that the 

 summer stage is due to a weakened condition of those plants growing on 

 dry soil, during seasons of extreme drought. (See also p. 501.) — 3/. C. C. 



Assimilation of Carbon Dioxide in Ulva latissima, L., Effect 

 of Salts on. By E. A. Newell Arber, B.A. (Aim. Bot. xv. No. Ivii. 

 p. 39). — In recent work there has been a tendency to call greater atten- 

 tion to the importance of inorganic salts for the maintenance of carbon 

 assimilation, and the author says that the primary object of his research 

 was to obtain '* some idea of the extent to w^hich the power of carbon 

 assimilation is dependent on the absorption of nutrient salts, and of the 

 inhibition caused by the presence or absence of certain salts in the 

 medium." Very important results are obtained, as for instance that 

 common salt is found to be absolutely indispensable for even a moderate 

 amount of carbon assimilation in Ulva. No other salt can take its place. 

 Calcium sulphate and potassium chloride, in distilled water, inhibit carbon 

 assimilation almost completely. — B. I. L. 



Aster Diseases (U.S.A. Exp. Stn. Hatch, Pveports 12 and 13, 1900-1). 



■ — G. E. Stone and R. E. Smith complain of the trouble of growing Asters 



