300 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



of bottles. The depression at the bottom catches and holds water, and 

 if cress is planted between the bottles and watered daily it thrives well. 



If attacked by small green caterpillars, a spray of nicotine 1 in 10 will 

 remove them. — F. A. W. 



Cucumber Beetle, The Striped. By F. H. Chittenden {U.S.A. 

 Dep. Agr., Div. Entom., Circ. 31). — A revised edition of the circular dealing 

 with the beetle Diabrotica vittata, which does considerable damage to 

 cucumbers and allied plants. — F. J. C. 



Cucumber Disease, Introduction of a new, into Germany. 



By Dr. Ewert (Internat. phytopath. Dienst. vol. i. No. 1, 1908, p. 8). — 

 Records the first appearance of the "false mildew" Pseudoperonospora 

 cubensis (B. et. C.) var. Tweriensis in Germany. The fungus, or a variety 

 of it, has long been known in America, and causes great damage there. 



G. H. P. 



Cunningfhamia sinensis. By A. G. Radde (Die Gart., p. 329; 

 July 10, 1909 ; fig.). — This belongs to the Coniferae, and is not alone rare 

 in European gardens but is nearly exterminated in its native habitat (but 

 see Mr. Wilson's remarks, p. cxxiv). It is quite hardy in a cool position, 

 slightly sheltered from winds. The leaves are evergreen, broad, glaucous 

 green. The specimen described and figured is in the Dendrolog. Gard. 

 at Aix-la-Chapelle, Germany. There is also a fine old specimen in the 

 garden of the Grand Duke of Baden at Baden-Baden. — G. E. 



Dioon, Anatomy Of. By Bernhardt Thiessen (Bot. Gaz. vol. xlvi. 

 pp. 357-380 ; November 1908 ; plates 23-29). — A very full account of 

 the histology of the seedling of Dioon edule. — G. F. S.-E. 



Eleagnaceae, Monograph Of. By C. Servettaz (Beih. Bot. Gen- 

 tralbl. vol. xxiv. Abth. 2, Heft 1, pp. 1-128 ; August 1909 ; 15 figs.).— The 

 author describes fully, and gives the distribution of all the species in this 

 order which he restricts to the three genera Hippophae, Shepherdia, and 

 Eleagnus. The area of H. rhamnoides extends from W. Europe to W. 

 China and from 67° N. lat. to the Mediterranean. It does not occur on 

 the Atlas. It is found from sea level to 2,000 metres alt. in mid Europe 

 and up to 4,000 m. in the Himalayas. It grows best on an argillaceo- 

 siliceous soil which is permeable to water. The place must be sunny and 

 not covered by turf. A particularly favourable situation is the bare 

 slope of a ravine. The author doubts Koppen's view that it existed on 

 the shores of all the tertiary seas, and hence reached the Alps, Caucasus 

 and Himalayas during the period of upheaval of these mountains. The 

 fossils Folliculite and Carpolithes are supposed by him to be seeds of 

 Stratiotes, and other leaves ascribed to Hippophae are very like Pimelea 

 or Gomus. Several new species of Eleagnus are described (by the 

 subdivision of E. latifolia and from new discoveries). The distribution 

 is interesting, for each group of allied species belongs to a definite 

 geographical area, although the respective areas of two different groups 

 may overlap. The author admits E. arcticus, Heer, from the miocene 

 of Greenland as a true Eleagnus. The seeds may be distributed by 



