NOTES AND ABSTRACTS. 



121 



Cotton Anthpacnose, The Perfect Stag-e of the. By 0. W. 



Edgerton (Mycologia, i. p. 115-; 1909). — The author discovered the 

 mature form of the fungus ColletotricJium .gossypium on cotton bolls 

 after a period of very warm and very wet weather. He proposes the 

 name Glomerella gossypia for it, and describes it. He suggests the 

 possibility that the forms now included under the genus Glomerella 

 may possibly find a resting-place in Physalospora. — F. J. C. 



Cotton-Boll Weevil in 1909, The Status of the. By W. D. 



Hunter (U.S.A. Dep. Agr., Bur. Entom., Circ. 122; Dec. 1910; 

 1 map). — The weevil is spreading to the east and north. Practically 



11 the State of Louisiana is within the infested area. 



Although the advance to the east and north seems to be certain, 



t is only with great difficulty, if at all, that the weevil can make its 



^ay westwards. 



In the high open plains of Western Texas, where cotton produc- 

 ion has enormously increased during the last ten years, the weather 

 onditions will probably serve as an elfective barrier against the weevil, 

 dded to this, there is very little timber in which the insects may 

 btain shelter from the severe winters, and the dryness of the sum- 

 ers, causing small plants and little shade, will act as an equally 

 trong check. — V. G. J. 



Cotton, Relation of Droug-ht to Weevil Resistance in. By 



0'. F. Cook {U.S.A. Dep. Agr., Bur. PI. Ind., Bull. 220; August 

 911). — It has been found that dry weather gives a distinct advantage 

 n the production of cotton in the presence of the boll weevil, which 

 'oes not prosper during drought because the young larvse are killed 

 "hen the infested buds fall ofi and lie on the hot, dry ground. But, 

 zithout a supply of moisture in the soil, the same drought that hinders 

 ' e reproduction of the weevil will also stop the growth of the plants, 

 ■hus reducing the advantage that might be gained from the dry weather. 



If, however, the land is well and deeply cultivated, the roots can 

 btain sufficient moisture to grow and set their crops during periods of 

 rought.— y. G. J. 



Cruciferae, Genealogry of the. By Dr. A. von Hayek (Beih. 

 ot. Cent., Bd. 27, Abt. i. Heft 2, pp. 127-335; 5 plates).— This paper 

 endeavours to classify this order according to phylogenetic origins. 

 The systems of Schweidler, Bayer, Oalestani, and others are fully 

 described. The author gives full descriptions of the genera, and dis- 

 cusses the phylogeny of the order. — G. F. S. E. 



Cruciferae, Nectaries of the. By Prof. Jos. Heinr. Schweidler 

 {Beih. Bot. Cent. Bd. 27, Abt. i. Heft 3, pp. 337-90; with 1 plate).— 

 This is an historical and critical study of the type and systematic 

 mportance of the cruciferous nectary. The works of Hildebrand, 

 illani, Velenovsky and. Bayer are detailed and discussed. The author 

 then describes the leading types of nectary. 



