962 JOUKNAL OF THE ROYAL HOETICULTUEAL SOCIETY. 



PcRonia alhiflora. — The rare, true, large, single white-flowered. 

 Anemonopsis macrophylla. — Resembling as much a large Anemone as 

 a Clematis ; exceedingly rare. — G. E. 



Polystachya pubescens, Rchb. f. (Cogniaux in Diet. Icon. 

 OrcJi., Folyst., pi. 1 ; 11/1901). — A small species from South and S.E. 

 Africa, introduced in 1840. Flowers fragrant, golden-yellow, with crimson- 

 purple lines. — C. C. H. 



Pomelos. By H. H. Hume (U.S.A. Exp. Stn. Florida, Bull. 58 

 6/1901 ; 7 plates). — Gives an historical account of the plant {Citrus 

 decumana) and of its popular name ; a description of the tree and of the 

 chief varieties (the fruits of which are illustrated), and a summary of the 

 composition of the ash of the fruit, with a note as to the best fertilisers 

 to be used in its cultivation. — F. J. C. 



PotatOS (Woburn, 2nd Bep. 1900, p. 228).— The trial of planting 

 them at different times — end of March, end of April, and end of May — 

 showed the result that those planted at mid-season did best. Those planted 

 early produced proportionately the most misshapen Potatos. As to 

 size of seed, medium size yielded best. These experiments must year by 

 year be of greater value to fruit farmers and gardeners, and gratitude is 

 due to the Duke of Bedford for carrying out such practical and scientific 

 experiments for the benefit of the country. — C. H. H. 



Potatos. Spraying Potatos to prevent disease and to increase the 

 yield. By Henry F. Hill {Qii. Agri. Journ. ix. p. 3 ; September 1901). 

 Spraying with strawsonite was not quite so successful as usual in pre- 

 venting the disease in the Rubers, but had a very decided and beneficial 

 effect on their size and the yield of the crop. Spraying has the effect of 

 prolonging the life of the haulms, so that the period of storage for starch 

 and other materials in the tuber is much increased, and the sprayed plots 

 asually yield a larger and more regular sample than the unsprayed. The 

 produce per acre was 7 tons 12 cwt. unsprayed, and 9 tons 14 cwt. 

 sprayed, showing an increased yield of 2 tons per acre. — M. C. C. 



Potatos, Sweet— Ipomea Batatas {Joitr. Imp. Dep. Agr. W.I. 

 vol. ii. No. 4, p. 293). — The Sweet Potato is said to be the most important 

 of all West Indian home-grown food stuff's, and only second to sugar-cane 

 in general importance. They are largely grown by the peasants owing 

 to the ease with which they are propagated, the poor soil in which they 

 will thrive, the small amount of attention they require, and the short 

 time in which they will come to maturity. The crops are represented as 

 enormous, but there is great difficulty in storing the tubers, which keep 

 only a short time. Experiments are now being made with a view to 

 establishing mills for converting the Potatos into flour in order to meet 

 the difiiculty of scarcity of food during the dry seasons of the year when 

 the peasants are reduced to the greatest straits. The flour when 

 properly made is said to be quite palatable and satisfactory, but it requires 

 the utmost care in preparation and absolute dryness of storage. Both 

 tubers and foliage are also good for fodder for cattle and for horses. A 



