ABSTRACTS. 



1145 



sugar to invert sugar. These changes proceed rapidly soon after the 

 apple is removed from the tree, so that the fruit should be placed in cold 

 storage as soon as possible. — F. J. C. 



Coloured Leaves of Polygonum (Beth. Bot. Cent. bd. xiii. ht. 2, 

 pp. 203 210). — Dr. Anton J. M. Garjeanne gives an account of the 

 coloured abnormal leaves of various species of Polygonum near Amsterdam 

 (seven figures in the text.) — G. F. S.-E. 



Cornus alba L. By G. Ugolini (Bull. B. Soc. Tosc. Ort. 11, p. 343, 

 November 1902). — The name Cornus is derived from the horny character 

 of the wood of the old shoot. The present species is one of the most 

 beautiful, on account of the blood -red colour of the shoots and branches 

 exhibited on the fall of the leaves. The specific name is derived from 

 the colour of its timber, but corresponds also with the white, somewhat 

 pleasant-tasting, berry. The plants form a cheerful and almost brilliant 

 feature amid the pale dull monotony of a winter landscape. 



Other species, almost all North American, have been adopted for 

 planting in large shrubberies : C. car idea, with azure, primrose fruit ; 

 C. florida, with very large foliage, and a small yellowish flower, sur- 

 rounded by a kind of rosy-white involucre affecting the appearance of a 

 large corolla ; C. canadensis with herbaceous stem 10-15 cm. in height, 

 whose flowerets are furnished with a similar involucre to that of the 

 preceding species ; C. paniculata, whose clustered reddish fruits adorn 

 the plant until springtime. All the Dogwoods are hardy and almost all 

 soils suit them, save the excessively sandy or calcareous kinds. They are 

 easily propagated both by cuttings and by seed. — W. C. W. 



Corydalis thalictrifolia, and other Species. By A. Henry 

 (Gard. Chron. No. 825, p. 288, fig. 91 ; and Supplement, Oct. 18, 1902). 

 This charming rock plant has lately been introduced into cultivation by 

 Messrs. Jas. Yeitch & Sons. It is a native of Ichang, in Central China. 

 " Kept in a greenhouse, it remains in flower through the winter months ; 

 placed in the open, as at Kew Gardens, it flowers all the summer." A full 

 description of the plant is given, from which it appears that the flowers 

 are of a yellow colour and from J to 1 inch in length, and are borne in 

 racemes. Short descriptions are given of three other species from the 

 same neighbourhood. — G. S. S. 



Cranberry Insects. By Dr. J. Smith ( U.S.A. Exp. Stn. New Jersey, 

 Bep. 1901, pp. 511-526). — An account is given of the method of investiga- 

 tion adopted in determining the life-history of the Cranberry Katydid 

 (Scudderia texensis). The insect lays eggs in the leaves of plants grow- 

 ing in Cranberry bogs, preferably in those of species of Panicum, during 

 the month of September. Burning over the area surrounding the bogs is 

 recommended as a means of getting rid of the pest, and a " cyclone 

 burner" is described. — F. J. C. 



Crinum natans. By Sir J. D. Hooker (Bot. Mag. tab. 7862).— Nat. 

 ord. AmaryllidecB, tribe Amaryllece. Native of Guinea. This is the only 

 species with submerged leaves, closely allied to C. purpurascens of the 



