852 ADDENDA AND CORRIGENDA. 



P. 790. — For Trichiacea read Trichiaeeae. After Trichia add : — 



Family Plasmodiophore^e. 



Plasmodiophora, Woronin. 



Brassiere, Woronin. — On roots of Candytuft {Iberis umbel- 

 lata). Det. by Miss E. M. Wakefield. 



This disease is the well-known " Finger-and-toe " or " Club- 

 root " of Cruciferous plants (Cabbage, Turnip, &c. ), and has 

 recently been found attacking very badly plants of Candytuft in 

 Brisbane gardens ; probably introduced with seed of European 

 origin. In a paper by Mr. G. Massee in the " Proceedings of the 

 Royal Society," and reprinted in the " Kew Bulletin," 1895, pp. 

 130-132, he makes the following remarks: — "The germs of the 

 disease are present in the soil that has produced a diseased crop, 

 and retain their vitality for at least two years. For the purpose 

 of sterilising infected soil, experiments prove that either a dressing 

 of lime or a manure containing potash-salts is effective, the last 

 being most valuable, as it not only destroys the germs in the soil 

 but also arrests the disease in seedling plants, and at the same 

 time supplies one of the ingredients necessary for the healthy 

 growth of turnips." 



P. 792. — Alter Rhizomorpha add: — 

 Ozonium, Link. 



auricomum, Link. — On dead logs of Poinciana regia, Brisbane 

 (C. T. White). Det. by Miss E. M. Wakefield. 



Order ALGJE. 



P. 795. — Chaetomorpha : After tortuosa, Kuetz., add: — 

 aerea (Dillw.), Kuetz., De-Toni, Syll. Alg. i. 273. 



Hab. Coolangatta, C. T. White. Det. by A. D. Cotton, Royal 

 Botanic Gardens, Kew, England. 



NUMBER OF KNOWN QUEENSLAND PLANTS. 



Phsenog. Gen. (Indig.) 1,222, (Nat.) 119; total 1,341 Sp. 4,259 Var. 437 Nat. 307 

 Crypt. Gen. .. .. .. .. .. .. 818 Sp. 3,606 Var. 283 



