Arhoricultural Notices. 181 



Art. Vn. Arhoricultural Notices. 



Disbarring Timber Trees to increase the Durability of the Timber is useful in 

 the case of the resinous tribe, but injurious with trees that are non-resinous. 

 This is the result of extensive experience in the South of Fi'ance by M. Laure 

 of Toulon. This gentleman has also found that the trunk of the white oak 

 (Quercus pedunculata), disbarked when in full sap, has a power of reproducing 

 the bark. Soon after disbarking, some drops of a fluid ooze out, which 

 thickens and takes a green colour as soon as it comes in contact with the 

 atmosphere ; and this process of oozing out, thickening, and colouring, con- 

 tinues till the surface of the trunk, which had previously been laid bare as far 

 as the soft wood, is covered with a rough granulated surface of a greyish 

 colour without, and of a herbaceous green within. By degrees, a very thin 

 pellicle is formed on the surface of this exuded matter, which ends in becom- 

 ing the epidermis of a new bark ; and this bark, by the end of the first 

 summer, becomes of sufficient thickness to admit of the descent of the sap 

 from the branches to the base of the trunk. {Ann. (THort. Soc. de Paris, 

 torn. xxxi. p. 17.) [We have known the same thing take place in the case of 

 a pear tree, the trunk of which had been laid completely bare to the white 

 wood all round, and for between 3 ft. and 4 ft. in length.] 



Raising American Trees from Seed. — Mr. Charl wood's annual Catalogue of 

 American Tree Seeds, just printed, is this year unusually rich in the genera 

 Andromeda, /uglans, Carya, MagnoKa, Pinus, i^hododendron, and various 

 others ; and, as packets of these seeds may be sent by post to any part of the 

 United Kingdom, there never was so fine an opportunity for provincial nur- 

 serymen and country gentlemen to enlarge their arboretums at little expense. 

 We would recommend first procuring a catalogue from Mr. CKarlwood, and 

 next marking the species wanted, and returning it with an order at the rate of 

 ]5. for every species marked. We mention this mode, because a gentleman 

 with whom we have been conversing on the subject has complained to us that 

 some of the kinds are sold only by the bushel, and that he only wants a few 

 plants to extend his collection. — Cond. 



Nuts with a bony Shell, such as those of the olive, holly, hawthorn, &c., 

 which at present lie a year in the ground before they germinate, have been 

 found to grow the first year when the nut is broken, provided the kernel is 

 not injured. This has been effected in France, in the case of the olive, by the 

 aid of a small press or a vice, with which, it is said, a female can break 2000 

 olive nuts in one day, without injuring the kernels. We doubt if this could 

 be done so easily with the nuts of the holly or the hawthorn, but the sugges- 

 tion is worth trying. {Annates d'Horf. de Paris, tom.xxxi. p. 13.) 



Paid6w7ii2L ijnperidlis, in the Jardin des Plantes, showed flower-buds in the 

 autumn of 1841, which stood the winter and came into flower on the 29th of 

 April, 1842 ; thus proving the great hardiness of the tree when it can ripen 

 its wood. The flowers are of a fine blue, somewhat like those of Gloxinz« 

 caulescens, and they have an agreeable smell like those of Philadelphus. The 

 Paul6wn/« has been propagated to an amazing extent in France, so much so, 

 that it is said already to have produced more money to commercial gardeners 

 than any other plant known. The price has fallen from 5 guineas to 2s. 6d. 

 (Annates d''Hort. de Paris, torn. xxx. p. 406.) 



Balsam Poplars. — The following kinds are described by Dr. Fischer of St. 

 Petersburg in the Garten Zeitung, vol. ix. p. 401., and also in the Botanical 

 Register for March, 1843. We trust some nurseryman or private gentleman 

 connected with St. Petersburg will endeavour to procure living plants of 

 such of them as are not already in this country, or rather of the whole of 

 them ; for, though there are several of the names in Messrs. Lodd^es's col- 

 lection, yet the plants arc too small to enable us to judge how far they answer 

 Dr. Fischer's description. Should this meet the eye of Dr. Fischer, or of 



