294 On Forms of the Hop resistant to Mildew 



then we liave worked a stock of our own." In answer to enquiries, 

 M. Benard wrote: "La variete Humulus Lwpulus aureus ni'a ete fournie 

 d'apres ce que je crois me rappeler par M. Heerma Van Voss, pepinieriste 

 a Oudenbosch (Hollande), ce qui explique que je n'en suis pas I'obten- 

 teur" ; and Messrs H. W. van der Bom and Co. (U. J. Heerma Van Voss) 

 wrote : " our Mr Heerma has not introduced the Golden Hop {H. Lufulus 

 var. aureus)." Messrs E. Turbat et Cie wrote : " We are not the originators 

 of it." 



It seems clear from the above information that one stock of the 

 "Golden Hop" was imported from the Continent, and we may perhaps 

 assume that it was at the time mixed, and consisted of an immune 

 female plant — as to the origin of which I have not up to the present 

 been able to obtain any information — and a susceptible male plant, 

 which, as will now be shown, is probably to be identified as the H. Lwpulus 

 aureus described from Germany. 



(2) Another stock of the "Golden Hop" in this country has been 

 distributed from Messrs Dicksons, who very kindly supplied me w^ith 

 plants in 1917. With regard to the origin of this plant the firm wrote: 

 " H. Lwpulus aureus originated from a sport about 1893. It was discovered 

 in a botanic garden in Germany and we bought half the stock which is 

 very limited. We propagated and sent out 3 years afterwards (1896). 

 It is propagated from shoot and root cuttings. The book containing the 

 record has been destroyed. We issued a coloured plate of it, but the 

 supply is now exhausted. This plate does not show the sex of the plant. 

 We have so far as we know only the female form." 



All the plants sent by Messrs Dicksons proved (in the greenhouse) to 

 be susceptible to mildew, and those which flowered the next year in the 

 hop garden (being the same individuals as those which were susceptible 

 to mildew the previous year) all proved to be males. On acquainting 

 Messrs Dicksons with the latter fact, the firm wrote: "Several of our 

 Golden Hops are flowering this year but all are male plants." 



Through help given by Prof. L. H. Bailey, it became possible to 

 identify this male "Golden Hop" obtained from Germany. Prof. Bailey 

 referred me to Die Gartenwelt, iii, 1899, p. 476, from which I transcribe 

 below the more important descriptive parts: " Neue Pflanzen. Humulus 

 Lupulus aureus Von C. Bonstedt, Obergartner des botanischen Gartens 

 in Rostock.... Als neuestes Goldkind, welches sich den Genannten eben- 

 biirtig zur Seite stellt, fiihre ich heute den geschiitzten Lesern eine 

 Schlingpflanze und zwar einen Sport des allbekannten Hopfens {H. Lu- 

 pulus L.) vor. ...H. Lupulus aureus ist bis jetzt nur in mannlichen Pflanzen 



