NOTES AND ABSTRACTS. 



595 



that the control of the water supply is a very important factor in the 

 prevention of the occurrence of disease. This and the destruction of 

 diseased plants, the selection of resistant plants, and the application of 

 fungicides, such as Bordeaux mixture, offer the best means open to the 

 grower in dealing with the diseases. Full descriptions of the fungi 

 and the diseases they produce are given, and the fungi are figured. 



F. J. C. 



Cucumbers. By L. C. Corbett (U.S.A. Dep. Agr. } Bull. 254).— 

 Cucumbers in the States are grown for market, much as in England, 

 in the open, in cold frames, in hot-houses, and also for pickling. The 

 American type of cucumber is short and somewhat triangular in cross- 

 section. It is marketed when about 10 inches long and 2 inches in 

 diameter, and is especially useful for early slicing, and for pickling 

 purposes. The larger "English" type is almost exclusively grown in 

 forcing-houses. Bordeaux mixture (3 lb. copper sulphate to 6 lb. fresh 

 lime to fifty gallons of water) is used against mildew and other diseases. 



C. II. L. 



Cymbidium erythrostylum. By B. A. Rolfe.— Nat. ord. 

 Orchidaceae ; tribe Vandeae ; Annam. Erect epiphyte, \\ foot high ; 

 sepals lj inch long, white; petals white; lip broadly obovate, three- 

 lobed, yellowish-white, with red-purple lines. — G. II. 



Delphinium candidum. By W. B. Hemsley (Bot, Mag. tab. 

 8170). — Nat. ord. Banunculaceae ; tribe Ilelleboreae ; Tropical Africa. 

 A dwarf perennial ; leaves palmately 5-lobed ; flowers pure white, with 

 purple anthers, 2Jj inches across ; spur cream-coloured. — G. H. 



Delphinium maerocentron. By W. B. Hemsley (Bot. Mag. tab. 

 8151). — Nat. ord. Banunculaceae ; tribe Ilelleboreae; mountains of East 

 Tropical Africa. Stems 5 feet high ; flowers hairy, blue and green or 

 yellowish and green, 2 inches long. — G. II. 



Dendrobium Ashworthiae. By R. A. Rolfe {Bot. Mag. tab. 8141). 

 Nat. ord. Orchidaceae ; tribe Epidendreae ; New Guinea. Epiphyte 

 1 foot high ; flowers cream-white with purple streaks at base of lip ; 

 sepals 1] inch long ; petals obovate, § inch broad. — G. H. 



Deutzias : New Species. By Hort. (Le Jardin, vol. xxi. No. 497, 

 p. 325 ; November 5, 1907 ; 1 fig.). — Deutzia discolor carnea (hybrid 

 from D. scabra and D. discolor grandiflora), with beautiful rose-red 

 blooms ; D. discolor lactea (from D. scabra and D. discolor grandijlora), 

 milky-white flowers ; D. gracilis candelabra (from D. gracilis and 

 D. Sieboldiana), remarkably graceful, flowers creamy-white, with bright 

 yellow stamens. — F. A. W. 



Dioscorea Batatas. By l'Abbe Meuley (Jour. Soc. Nat. Ilort. 

 Fr. ; 4th Series, vol. viii. ; May 1907). — A complete account of the best 

 method of cultivating the Sweet Potato (Dioscorea Batatas), which is 

 described as a valuable vegetable, giving more trouble in cultivation than 

 the potato, but superior to it in nourishment, more delicate in flavour, 



