430 BIBLIOGRAPET. 



Introduced and Naturalized species. Bombay, 1861. 1 vol. 8vo. 

 pp. 332. Suppl. pp. 112. 



With brief descriptions of the species, but none of Genera and 

 Natural Orders. 



Dattbei^t, C. — On the Power ascribed to the Eoots of Plants of 

 rejecting poisonous or abnormal substances presented to them. 

 Chem. Soc. Quart. Journ. xv. 209. 



On the Physical Forces concerned in the phenomena of 



Vegetation, and especially on those which form the subject of 

 the Memoirs " On Colloid Bodies," contributed by the Master of 

 the Mint. Gard. Chiton. 1074. 1098. 1861. 



Debeaux, O. — Catalogues des Plantes observees dans le territoire 

 de Boghar (Algerie.) Ext. Act. Soc. Linn. Bord. 1861. Svo. 

 pp. 121. 



• Sur la vegetation de quelques localites du littoral de la Chine. 



Eec. Mem. Med. Ser. iii. vi. 334. 1861. 



Some account of the vegetation of Amoy, Shanghai, and 

 Tchefou. 



Decaisne, J. — Sur I'origine organique des vrilles de Cucurbitacees. 

 Bull. Soc. Botan. vii. p. 461. 



Observations upon an anomalous melon flower, in which one 

 of the calycine segments was prolonged into an ordinary curled 

 tendril, — confirmatory of M. Naudin's view that the tendril 

 results from the nerves of a leaf deprived of parenchyma, pro- 

 ceeding from an axillary atrophied branch, and opposed to Dr. 

 Clos' interpretation, that it is due to a collateral ' dedoublement' 

 of its adjacent normal leaf. 



DeCandolle, Alph. — Flora Brasiliensis. Pasc. xxviii. Pars-Bego- 

 niaceae. pp. 337. With 11 plates. 



All the species, 83 in number, are referred to the typical 

 genus Begonia. 



DeCandolle, C. — De la production naturelle et artificielle du Liege 

 ^dans le chene-liege. Ext. Mem. Soc. Phys. Geneve, xvi. 1860. 

 pp. 15. 3 plates. 



Cork of commerce is obtained from Quercus ocddentalis. Gay, 

 in S. W. Prance and Portugal, and Q. Suber in S. E. Prance, Italy, 

 Algeria, and the Mediterranean Islands. M. DeCandolle de- 

 scribes the first formation of true cork in the cortical layers. It 

 is formed of polyhedric cells, square ia section, deposited in 

 annual layers alternating with one or two rows of tabular cells, 

 with rather thicker walls. The square cells constitute the true 

 cork, the tabular ones Periderm. 



The cork formed prior to the first decortication of the oak is 

 valueless : it is termed ' male,' and the operation of its removal 

 ' demasclage.' The cellular tissue, with its subjacent liber laid bare 

 by the process, the workmen call ' la mere,' and it is in this tissue 

 at a variable distance from the surface, that the new cork {liege 

 femelle) first forms, increasing by the addition of annual layers in 



