118 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



alarming spread of harmful insects through the importation of 

 infected stock is beginning to attract the attention of cultivators and 

 politicians in Algeria. The Ficus trees which line the boulevards in 

 Algiers have been seriously injured by an invasion of red scale. 

 Ghrysomphalus, after spreading over Southern Spain, the Eiviera, 

 Corsica, Sicily, and Liguria, is now invading North Africa. It is the 

 more to be dreaded that it appears to attack indifferently every green 

 tree that grows: Orange, Palm, Yucca, Agave, Aloe, Ficus, Lemon, 

 Ivy, Araha, &c. 



Instant destruction of all infected plants is the only certain method 

 of checking the ravages of this pest, and unfortunately it is suspected 

 that it has already found a breeding-ground in the ivy which is so 

 common in the country round Algiers. In orange- gardens fumigation 

 with hydrocyanic a.cid is recommended, and lime-sulphur sprays may 

 also be tried, but cultivators are anxiously awaiting more stringent 

 laws against the importation of infected stock, more adequate inspection 

 of nurseries, and compulsory destruction of diseased trees. — M. L. H. 



Cirsium, Mexican and Central American Species of. By Herr 



Fr. Petrak {Bcih. Bot. Cent. Bd. 27, Abt. ii. Heft 2, pp. 207-55; 

 2 plates). — Gives a careful description and critical discussion of the 

 systematic characters of the twenty-five species of this genus found in 

 the above region. There is also an analytical key to the species. 



G. F. S. E. 



Citrus aurantium, A Variety of Cladosporium herbarum on, 

 in Florida. By H. S. Fawcett and 0. F. Berger (Phytopathology , i. 

 5, pp. 164-6). — A variety of Cladosporium herbarum for which the 

 authors propose the name var. citricolum has been isolated from 

 ' scaly bark ' of oranges. On inoculation with the fungus the disease 

 has been reproduced on small branches of the orange. The fungus 

 passes through the Hormodendron stage, produces microsclerotia, and 

 developed a ' packet spore ' or Coniothecium stage. (See also U .S.A. 

 Exp. Stn. Florida, Bull. 106.)— F. J. C. 



Citrus, Reputed Hardy Orang-eCG^arti. Chron. p. 170, March 16, 

 1912; with fig.). — A variety of Japanese origin, known as Satsuma, 

 Ooushin, and Kii Seedless, sent by Messrs. T. Eivers and Son. 



E. A. B. 



Clematis Chrysocoma (Bot. Mag. t. 8395).— China. Family, 

 Ranunculaceae ; tribe, Olematideae. Shrub, of low stature. Leaves, 

 3-foliate. Flowers, solitary or 2-3. Sepals 1, f inches wide; white 

 with a rosy margin. — G. H. 



Clusia grrandiflora [Bot. Mag. t. 8387). — Guiana. Family, Gut- 

 tiferae ; tribe, Clusieae. Shrub, 10-20 feet in height, epiphytic. Juice 

 yellowish. Leaves, opposite, 6-12 inches long, 3-6 inches wide, 

 glabrous, dark green. Cymes terminal, 2-3 flowered. Male, sepals 



