NOTES AND ABSTRACTS. 



147 



quences of introducing methyl-blue into the ovaries of Carnegiea and of 

 Oenothera.— G. F. S. E. 



Honey, Production and Care of Extracted. By E. F. 



Phillips, G, A. Browne, and G. F. White {U.S.A. Dep. Agr., Bur. of 

 Ent., Bull. 75, parts i. iii. iv., 1907-1908). — body of information for 

 the scientific bee-keeper. — M. L. H. 



Hyacinth, Tetramerous flowers of. By H. Fischer {Beih. 

 Bot. Cent. Bd. 27, Abt. i. Heft 1, pp. 52, 53).— The author found the 

 two lowest flowers of a white hyacinth bloom to be tetramerous. He 

 found the number of perianth segments to be less in the flowers higher 

 up, the inflorescence diminishing fro^i 8 to 7 and finally 6. He found 

 in cases of peloria the number of spurs to be always greatest towards 

 the base of the inflorescence, and he is inclined to attribute the abnor- 

 mality in both cases to an excess of nourishment. 



He considers light favours carbon-assimilation, which favours flower 

 formation, and refers to Klebs' discovery of the relation between sugar 

 contents and abundance of flowers. — G. F. S. E. 



Impatiens Herzogrii {Bot. Mag. t. 8396). — German New Guinea. 

 Family, Balsaminaceae. Herb, glabrous. Leaves, 2^-5^ inches long. 

 Inflorescence, simply pedicelled. Flowers, showy, 1|-2J inches across, 

 scarlet. — G. H. 



Insect Pests, Destruction of. By U. Dammer {Gartenflora, 

 vol. Ix. pt. xxii. pp. 501-3). — Thripsoline, a German preparation, is 

 recommended as an efficient insecticide. — S. E. W. 



Insects and Diseases affecting- Horticultural Crops, The 



Control of. By H. E. Fulton, W. J. Wright, and J. W. Gregg 

 (U.S.A. Exp. Sta., Penn., Bull. 110; April 1911).— This bulletin con- 

 tains descriptions of the principal insect enemies and fungoid diseases 

 of fruit and vegetables, with formulae of sprays and washes. — V. G. J, 



lonopsidium acaule. By Ad. van den Heede {Rev. Hort. Beige, 

 p. 185, June 15, 1911). — A plea for the more extended culture of this 

 plant which is enthusiastically described, and which is said to make a 

 charming companion to Spergula pilifera or Sagina suhulata. One 

 peculiarity of lonopsidium is the wonderful rapidity of its growth. 

 Eight or ten weeks after it is sown the plant will be in flower, and it 

 remains so for several months. Successional sowings would keep up 

 a continuous supply of this pink or white flower with its delicate scent. 

 It should be raised in boxes and pricked out, and it might be raised in 

 pots in quantities for market purposes, as musk used to be at one 

 time.— M. L. H. 



Iris tenuissima, sp. nov. By W. E. Dykes {Gard. CJiron. p. 18, 

 Jan. 13, 1912). — Description and, Latin diagnosis of a Californian Iris 

 approaching Iris Purdyi. — E. A. B. 



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