478 



JOURNAL OF THE ROYAL HORTK 'ULTTTRAL SOCIETY. 



Rhododendron sutchuenense {Bot. Mag. tab. 8362).— Cen 



tral China. Family, Ericaceae ; tribe, Rliodoreae. Shrub, 8-10 feet 

 high, flowering when 2 feet in height leaves, 3-10 inches long; flowers 

 densely corymbose, 3 inches across, corolla rose-coloured. — G. H. 



Rose, *Mme. Jules Grolez.' By V. Jablanczy {Oester. Gart 

 Zeit. vol. V. pt. 12, .pp. 471-2).— This rose deserves to be more 

 generally grown. Its only weak point is that it has but shght scent 

 The foliage, bud, and flower leave nothing to be desired. It is seen 

 to best advantage in low groups. — S. E. W. 



Roses, Malformed. By K. Josefsky (Oester. Gart. Zeit. vol. vi 

 pt. 3, pp. 106-110). — A sudden fall of temperature checks the develop- 

 ment of the buds, preventing them from opening or producing mal- 

 formed blossoms. The following roses are peculiarly susceptible: 

 ' Auguste Mie,' ' Mme. Moser,' ' Mme. Damaizin,' ' Mme. Boll,' * La 

 Eeine Hermosa,' 'Jules Margottin,' 'James Bougoult,' ' Eobert 

 Lebaudy,' ' Olio,' 'Marie Guillot,' ' Etoile de Lyon,' and ' Clotilde 

 Soupert.'— 5^. E. W. 



Roses, Novelties (Oester. Gart. Zeit. vol. vi. pt. 2, p 73). — Two 



new hybrid teas are well worth growing ; ' Eeine Mere d'ltalie ' has fine 

 foliage, oval buds on long stiff stalks. The colour of the bud is apricot, 

 the flower resembles ' Soleil d'Or * in colour. ' Mrs. Edward Powel ' 

 is a strong grower bearing purple flowers with scarlet markings. 



S. E. W. 



Rusts, South African Cereal. By J. B. Pole Evans (Jo7ir. Agr. 

 Sci. vol. iv.. pt. 1, pp. 95-104).— Four rust fungi, Puccinia^ graminis 

 Pers. , P. triticina Eriks/, P. coronifera Klebahn, P. dispersa Eriks., 

 attack various cereals in S. Africa, the first being the worst. The 

 aecidiospore form does not occur, and so far the teleutospores have 

 not been found capable of germination. Inoculation experiments havie 

 revealed some curious results, e.g. P. gra^nims attacks rye late in the 

 season, and always on the stalks, not on the ears. Eepeated inocu- 

 lation of the leaves has failed to induce infection thereon.. The' form 

 which occurs on wheat and barley fails to attack oats and rye, and it 

 will not attack barley during the winter, although in summer barley is 

 readily attacked. The form on oats will not attack wheat or barley. 

 It is found that cereals which are rust-resistant in America, Australia, 

 England, and India do not retain this quality in South Africa, or, at any 

 rate, not through the whole area of cultivation there. The author 

 crossed resistant varieties with rusted ones and found the hybrids much 

 more susceptible to rust than the parents were. The spores from the 

 more vigorous parasite on the hybrids proved capable of iiifectingl 

 both parents in a very virulent fashion, the hybrids thus acting as] 

 " bridging " varieties. It would thus appear that the infection of thei 

 "resistant" varieties in South Africa is, at least to some extent, 

 owing to a change in the constitution of the fungus, and not wholly,] 



