230 Domestic Notices : — Englajid. 



centripetal developement that produces the cork. The parenchyma of the 

 bark has no share in the production of this substance, unless we consider it as 

 furnishing liquid nourishment, for the extraordinary developement of the 

 cellular tissue. It is proved, by this mode of growth, that cork is entirely 

 composed of transverse rows of small cells, of which the oldest are on the 

 outside, and the last formed on the inside. The tissue formed by their assem- 

 blage is disposed in layers. Each of these layers corresponds to one year's 

 growth. 



There is also a variety of the elm which produces cork ; but it is orily found 

 on the branches, which are from eight to ten years old. After this age the 

 production of cork ceases. It is particularly in this sort of cork, which differs 

 little from that of Quercus (Suber, that M. Dutrochet has observed the mode 

 of growth of this substance. 



The interior of the prickles upon roses and brambles is occupied by true 

 cork, of the same nature as the preceding. The same is the case in the 

 prickles of Xanthoxylum juglandifolium. Among monocotyledonous plants, 

 we find an instance of the production of cork in the T^mus elephantipes. It 

 is upon the enormous rootstock of this plant that the formation takes place ; 

 and it is absolutely the same as other cork. (Li" Hermes, Jan. 14. 1837.) 



A hybrid Apple. — M. Legall, president of the Society of Science and Arts 

 of Rennes, has made known a vei'y extraordinary instance of hybridity. It 

 occurred in a variety of apple sprung from seeds probably fecundated by the 

 pollen of a variety different from that which bore the flower. These apples 

 were grown at the Chateau of Brequigny : they are very large, and somewhat 

 oblique at their base ; of a fine red on one side and yellowish or greenish on 

 the other. The two sides are of unequal thickness, and have a different 

 odour. The flavour is also different ; that of the red side being acid, whilst that 

 of the yellow side is very sweet. It may be called an apple formed by the 

 union of half a sweet apple, and half a sour apple. The seeds are scarcely 

 ever perfectly developed, as in most hybrids ; being commonly reduced to the 

 envelopes, which, however, are very thick, (/cf., Jan. 14. 1837.^ 



GERMANY. 



Palms for Sale at Hamburg. — Messrs. Ecklon and Zeyher collected many 

 plants of Encephalartos in South Africa in 1835; and the following species 

 are now at Hamburg for sale, at prices varying from 50 to 1200 marcs, ac- 

 cording to the size of the plants : — 



Encephalartos Frederic? Guiielmi Lehm., from 1ft. Sin. to 8 ft. 2 in. high; 

 from 3 ft. 4 in. to 4 ft. Sin. in circumference; price from 200 to 1200 marcs. 



E. Altenstelnz'i Lehm., from 5ft. 2 in. to 10 ft. 6 in. high; from 3 ft. to 4ft. 

 3 in. in circumference; and price from 300 to 1000 marcs. 



E. Caffer Lehm., from 4 ft. 1 in. to 9 ft. 7 in. high ; from 3 ft. 6 in. to 4 ft. 

 10 in. in circumference; and price from 400 to 700 marcs. 



E. horridus Lehm., from 1 ft. 4 in. to 2 ft. 7 in. high ; from 2 ft. 6 in. to 3 ft, 

 5 in. in circumference ; and price from 50 to 200 marcs. 



E. pungens, from 2ft. 5 in. to 2ft. 9 in, high; from 2ft, 9 in, to 3ft, 4 in. in 

 circumference ; and price from 200 to 250 marcs. 



These are the dimensions of the naked stems, without any leaves ; the 

 plants being at present lying in a dry room, and, consequently, in a fit state 

 for transportation. A marc is nearly Is. 3d. 



Art. Ill, Domestic Notices. 



ENGLAND. 



The Popuhis viridis Hort., P. nigra var, viridis Arb. Brit., p, 1652., I be- 

 lieve to be a native of Suffolk, and to have been first discovered by a person 

 of the name of Nurse, who lived at Bealings, near Woodbridge, Whether he 



