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JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



sulphur, copper sulphate, sodium borate, strawsonite, and other reputed 

 fungicides were experimented with but none proved of avail. 

 Eaw night-soil was found to encourage the disease. — F. J. C. 



Primula Littoniana {Bot. Mag. tab. 8341). — Nat. ord. Primu- 

 laceae; tribe Primuleae. Western China. Herb, 1-2 feet high; leaves 

 obtuse, narrowed at base, 8 inches long; scape 2 feet high, with a dense, 

 many-flowered spike, 3-5 inches long and 1| inch across ; flowers 

 reflexed, densely crowded, violet-blue. — G. H. 



Pyracantha ang-ustifolia {Bot. Mag. tab. 8345).— Nat. ord. 

 Rosaceae; tribe Pomeae. South-Western China. Spring-flowering 

 shrub ; leaves clustered, 2 J inches long ; corymbs few-flowered ; petals 

 white, sub-orbicular; fruit depressed globular, orange-yellow. — G. H. 



Rhodazalea, or Yellow Rhododendron. By J. G6r6me {Le 

 Jard. xxiv. 566, p. 279; September 20, 1910; with 3 figs.) x Rhodazalea 

 Crouxii and its double variety, the product of a rhododendron crossed 

 with Azalea 7nollis, are hardy yellow rhododendrons. Rhodazalea 

 differs from the hybrids of rhododendrons and azaleas known as 

 Azaleodendron by the number of its stamens, which are 5, while the 

 latter has 10. This difference in the number of the stamiens keeps the 

 two groups {Rhododendron and Azalea) distinct in horticulture. The 

 author goes on to discuss nomenclature of hybrids, and the alterations 

 in the rules of successive International Congresses. — F. A. W. 



Roridula dentata. By Dr. E. Marloth {Gard. Mag., No. 2961, 

 July 30, 1910, p. 588). — A description of this shrub, often called 

 the Fly-bush, was given before the Eoyal Society of South Africa. It 

 grows one to four feet tall and produces leaves with stalked glands 

 which secrete a viscid fluid, trapping many insects. It is not, however, 

 as previously supposed, an insectivorous plant, as the fluid has no 

 digestive properties and must not, therefore, be included amongst them. 

 The viscid fluid is probably only a protection against slugs and creeping 

 insects, &c. — E. B. 



Rosa Moyesii {Bot. Mag. tab. 8338). — Nat. ord. Rosaceae; tribe 

 Roseae. "Western China. Shrub, 8-10 feet high; leaves with 7-13 

 leaflets, 3-7 inches long; flowers deep blood-red, petals paler outside, 

 2| inches across; fruit deep orange, 2^ inches long. — G. H. 



Rusts of Tsuga canadensis. By P. Spauldmg {Phyto- 

 pathology, i. pt. 3, pp. 94-96; June 1911; figs.) The author has 

 found Peridermium Peckii to be the most abundant and widely distri- 

 buted of the Tsuga rusts, occurrmg on both T. canadensis and T. 

 caroliniana, attacking the leaves. A second form has been described 

 as P. fructigenum Arthur {Caeoma Tsugae Perley) ; it attacks the 

 cones. A form on the shoots not differing morphologically from that 



