613 



are exceedingly beautiful, and none more so than that of O. Morio, 

 which I have occasionally met with in the vicinity of Leominster, in 

 Herefordshire. In some instances the flowers were of a pure, unmix- 

 ed white, while in others the green lines, which serve as an excellent 

 distinguishing character of the species, were not only present but 

 very conspicuous, greatly increasing the beauty and remarkable ap- 

 pearance of the flower. — E. N-l 



BOTANICAL SOCIETY OF LONDON. 



August 7, 1846. — John Edward Gray, Esq., F.R.S., &c.. President, 

 in the chair. 



Donations to the library were announced from Mr. A. Ilenfrey, Mr. 

 G. Rich and the Leeds Philosophical Society. 



British plants have been received from Dr. Bromfield, Mr. C. E. 

 Broome, Mr. James Lynam, Mr. Thomas Moore and Mr. John 

 Thompson. 



The following papers were read : — 



" On the Potato Murrain," by Dr. Lhotsky, and " Notice of the 

 discovery of Uredo Melampyri {Ayres)^^ by Dr. P. B. Ayres. This 

 new Fungus was discovered by Dr. A. at Anerley, near Croydon, Sur- 

 rey, in July last. A specimen was presented. — G. E. D. 



A few words on the first appearance of diseased Potatoes in a 

 Garden. By Hewett C. Watson, Esq. 



With reference to two remarks on the ' Potato Fungus,' in the 

 * Phytologist ' for this month (p. 586 and wrapper), I beg to say a few 

 words. Curious to watch the first appearance of diseased tubers, 

 with reference to weather and ground, 1 became the practical potato- 

 provider for my small household, taking up, with ray own hands, all 

 the potatoes used during the first two months of the season, from the 

 open ground, namely, from the first week in June, to the second week 

 of August, excepting a few days of absence from home. Being very 

 much engaged otherwise about the middle of August, I transferred 

 the duty of potato -digging into the hands of the gardener. 



During the whole of that period, of about nine weeks, I did not 

 find a single diseased tuber, nor did I observe any trace of the "fun- 

 VOL. II. 4 G 



