362 JOURNAL OF THE EOYAL HORTICULTURAL SOCIETY. 



that such plants never produce satisfactory fruit, and they should 

 therefore be pulled up and destroyed as soon as recognised. — H. G. C. 



Tradescantia Laramiensis, n. sp. By L. N. Goodding (Bot. Gaz. 

 xxxiii. No. 1, p. 68). — This is related to T. scopulorum, the flowers being 

 lighter in colour. It is pubescent. — G. H. 



Trees, Scientific Methods of Transplanting: (Gard. Mag. 

 No. 2523, p. 149; 8/3/1902). — An extract from the Scientific American, 

 in which common-sense methods of tree moving are explained. Though 

 differing somewhat in detail, the methods advised agree with those that 

 have been followed in this country for generations. The article is, how- 

 ever, worth reading by all interested in the subject. — W. G. 



Trees, New, of N. America. By C. S. Sargent (Bot. Gaz. xxxiii., 

 No. 2, p. 108 seqq.). — The following are described : Prunus tarda, 

 Cratcegus Bushii, G. edita, C. fecunda, C. Georgiana, C. sordida, C. sera, 

 C. corusca, C. Elhvangeriana, C. gemmosa, G. blanda, C. Bavenelii, C. 

 lacera, and C. floridana. — G. H. 



Trees, New, Of N. America. By W. W. Ashe (Bot. Gaz. xxxiii. 

 No. 3, p. 230). — The following are described : Fraxinus catawbiensis, 

 Tilia ebumea, Cratcegus cibilis, C. altrix, C. obtecta. — G. H. 



Trees, Determination of Age of. By Baymond Roger (Rev. 

 Hort. pp. 21-24 ; 3 woodcuts ; January 1, 1902 ; and pp. 72-74 ; 2 figs. ; 

 February 1, 1902). — Two interesting articles dealing with the ring forma- 

 tion, the reason of its marked character, seasonal effects upon it, and 

 accidental disturbances. — C. T. D. 



Trevoria Chloris. By Sir J. D. Hooker (Bot. Mag. tab. 7805). 

 Nat. ord. Orchidece, tribe VandecB. — Native of the Andes of Colombia. 

 The spike is pendulous, few-flowered ; the sepals are broadly ovate, green ; 

 the petals very narrow, pale yellow ; the whole flower being 2 inches 

 across. — G. H. 



Trichopilia crispa marginata, Warner (Cogniaux in Diet. Icon. 

 Orch. Trichopilia ; pi. 2 ; 2/1902). — A large-flowered variety with a large 

 irregular white border round the sepals and petals and a fine regular 

 white margin round the lip. First appeared in 1862. — C. C. H. 



Trimming- and Pruning* Trees and Shrubs. By J. V. N. Standish 

 (U.S.A. Hort. Soc. Illinois, 1901 ; pp. 277-280).— In this short paper the 

 author shows the necessity of knowledge, skill, and judgment in pruning. 

 The pruner should know something of vegetable physiology and the 

 habits and growth of trees. Many trees may be killed by injudicious 

 pruning. The author proceeds to give some valuable hints, e.g. limbs 

 must be cut off close to the body ; prune trees in June and at no other 

 month : cover the wound, if large, with coal tar or paint. The paper 

 certainly well repays perusal.— V. J. M. 



