Descendenz und Hybriden. — Morphologie und Teratologie. 309 



ihe true orange, though far less hardy than the trifoliolate pa- 

 rent. In addition to the earlier „nocatee", a hybrid between 

 the tangerine orange and the pomelo is described under the 

 name „tangelo", and is considered to be commercially vakiable. 

 A number of new varieties of tangerine orange are also de- 

 scribed. Trelease. 



Wood, T. B., Note on the inheritance of Horns and 

 Face colour in sheep. (The Journal of Agricultural 

 Science. Vol. I. 1905. p. 364.) 



Suffolk sheep of both sexes are characterised by black faces 

 and the absence of horns. Both sexes of Dorset sheep have 

 white faces and large horns. 



The experiment was made of crossing 30 Suffolk ewes with 

 a Dorset ram. 



In Fl 25 males and 16 females were obtained. All had 

 speckled faces. 



The rams had large horns, but the ewes had none. 



Among 8 lambs reared in Fl- there appeared animals with 

 black, with white, and with speckled faces, and there were 

 both horned and hornless representatives of both sexes. 



The reciprocal cross yielded a similar result in Fi. 



The different types mentioned are illustrated by photo- 

 graphs. R. H. Lock. 



Blaringhem, L., Sur la production des tuber cules 

 aeriens de la pomme de terre. (Rev, gen. de Bot. 

 1905. XVII. p. 501—507.) 



Dans les conditions normales de la grande culture, on voit 

 se produire sur les tiges aeriennes de la pomme de terre de 

 petits tubercules. La „Geante bleue", dans les cas de bonne 

 nutrition et de maturite tardive, produit de Ipngues tiges de 

 1,50 m. avec tubercules aeriens pouvant peser jusqu'ä 100 gr. 

 Ces tubercules sont simples ou ramifies et portent des feuilles 

 reduites sur leurs bourgeons saillants. — Le facteur accidentel 

 influant sur la production de ces tubercules semble etre la 

 rupture partielle des tiges ä leur base, par suite des attaches 

 realisees par les tiges volubiles de Convolviiliis arvensis. II 

 suffit ensuite que l'humidite soit abondante et la Vegetation 

 vigoureuse pour que les tiges incompletement separees se trou- 

 vent dans les conditions qui semblent necessaires ä la formation 

 des tubercules: obscurite relative, transpiration limitee et con- 

 centration süffisante des liquides qui contiennent les produits de 

 l'assimilation. C. Queva (Dijon). 



GiBßS, L. S., Note on Floral Anomalies in Species of 

 Cerastiiinu (New Phytologist. Vol. III. No. 9 and 10. 

 1904. p. 243—247. Fig. 81—84.) 



The author describes the occurence of a secondary whorl 

 of carpels in Cerastliim quaternellum Fenzl., completely en- 



