774 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Oak. Among the young trees which came from these it was noticed that 

 one did not lose its leaves in the winter. From this a large number of trees 

 were propagated by grafting ; their leaves were evergreen, and the trees only 

 made one shoot in the course cf the season instead of two (in May and 

 August), and grew continuously." In the (Gard. Chron. No. 821, p. 221, 

 Sept. 20, 1902, are letters from Mr. W. Napper and Sir W. T. Thiselton- 

 Dyer, giving information about these Oaks, and expressing views which 

 differ from those held by Mr. Elwes. — G. S. S. 



Odontoglossum x Armainvillierense var. ardentissimum. 



By E. A. E. (Orch. Rev. p. 209, fig. ; July 1902).— A photographic 

 illustration of this lovely hybrid, Odontoglossum, which was certificated 

 at the last Temple Show of the Eoyal Horticultural Society as 0. x 

 ardentissimum. The origin of the cross and other particulars are clearly 

 given. — H. J. C. 



Odontoglossum grande Lindl. var. Pittianum hort. By Dr. 

 Kranzlin (Gartenflora, p. 225, pi. 1498; 1/5/02). — A description and 

 plate of this recently introduced pale yellow variety ; the labellum is white. 



J. P. 



Odontogflossum x Wendlandianum. By E. A. E. (Orch. Rev. 

 p. 135 ; May 1902). — Contains some interesting particulars of the 

 parentage of this natural hybrid. — H. J. C. 



Oldenlandia rhodesiana. By Spencer Le M. Moore (Joum. Bot. 

 475, pp. 250, 251; 7/1902). — Description of a new species collected by 

 Dr. Eand at Salisbury, Ehodesia, from specimens in the National 

 Herbarium. — G. S. B. 



Onosma echioides (0. tauricum). By F. W. Heyer (Die Gart. 

 p. 533 ; 9/8/1902 ; with illustration). — A pretty rock plant, with bright 

 yellow, urceolate flowers. Adapted for dry stony soil in exposed sunny 

 position. — G. B. 



Orange in North California. By D. H. Murray (Bull. Bot. Dep. 

 Jam. ix., Pt. 5, p. 75). — This discusses the relationship between the 

 plant and soil, winter rains, temperature, drainage, pruning, and best 

 varieties. — G. H. 



v 



Orange in South California. By J. W. Jeffrey (Bull. Bot. Dep. 

 Jam. ix., Pt. 6, p. 87). — Discusses varieties, cultivation, soil, insects, 

 and marketing. — G. H. 



Orange and Lemon Rot. By C. W. Woodworth (U.S.A. Exp. 

 Stn. California, Bull. 139; 2/1902; 5 figs.). — The fungus Penicillium 

 d 'ujitatum is the cause of the well-known rotting of oranges and lemons. 

 A popular description of the fungus and its growth is given, and the way 

 it et-ters the fruit pointed out. The preventive measures advised are 

 refrigeration, ventilation during storage, wrapping. The fruit affected 

 should be destroyed by fire or deeply buried, so as to reduce the source of 

 infection to a minimum. The curing and packing houses should be dis- 

 infected by thorough drying in the summer, or by whitewashing, or, if this 



