-2\ï IV' CO.NKKUKNCK INTF.HWÏKiWI.K HR (IKM'rriorK . 



/l'oNcs. — Tlu' besl f4'anlen rososarc iimut casilyraispd IVitiii liinls lliaii IViiin 

 socds, and nii a(l\aiilai4c wiiiilil |)r(>lial)l\ lie L;aiiii'd l)y allfinplinf^ lo raisc piiro 

 sccdliiiii liiir^. Il wiiidd ainirar lluM'cruic (liai llio a|)|ilicati()n of f^ciiclics 

 sliould 1)1' dirocicd 1» liio raising ol' ncw and improved variolios. In f)rder lo 

 clcar Hic way l'or lliis, and lo know prcciscly wlial lo use as parents so as lo 

 allain a dcfinile resull, il is necessary firsl oral! lo asceiiain llio gamelic com- 

 posiliim of llio liesl garden varielics; 7)')0 dislincl varielics of ail classes, hâve 

 hcen grown al llie Slation lliis year, and GO of Ihe best of Ihese varielies, 

 represenling Ihe Ilybrid Perpeliial, Ilybrid Tca, Tea, Climber and Rambler 

 classes hâve been selecled for seeding. Nainraily somc years musl clapse 

 before any delinile rcsulls can be recorded. 



ïhere is however anolher problem of greal imporlance lo nursery- 

 nien, which Ihc science of genelics can lielp lo solve, and llial is Ihc raising 

 of cerlain honiozygous lines of Seedling Briar Slocks, on which lo work 

 IIyl)rid Teas and Teas. The présent praclice is lo raise slocks from seeds col- 

 lecled promiscuoiisly from varions wild forms of linsa raïuna and arvcnxis. 

 Tlie varialiilily of Ihese forms is weli known, and Ihe resull is Ihat about 

 .")() per cent of Ihe slocks raised are unsuilable for Ihe purpose. C.onse- 

 quenlly Ihe wasle is considérable, and Ihe nurseryman oniy gels aboni lialfa 

 crop of Rose Irees. 



On Ihe olher hand a crop of Rose Irees worked on the uniform Manelli 

 Stock (raised from cultings) usually yields a full crop of heallhy plants. But 

 only Ihe Ilybrid Perpétuais and a few Hybrid Teas will Ihrive on Ihe iManelti, 

 and the Dog Briar musl be used for Ihe besl of the Hybrid Teas and Teas. 



The })roblem therefore is lo sélect a vigorous hardwooded seedling Briar 

 willi uprighl habit and straighl stem, and raise a homozygous line of tins 

 whicii will |)rovide a uniform stock suitable for working Ihe choicer \ariclies 

 of roses upon. \Ve hâve raised 100000 seedling Briars al the Slation frnm 

 which we are selecling Ihis year, certain spécial types lo breed from. in Ihe 

 iiope of ojjtaining a homozygous line of slocks snilable for Ihe pui'iiose. 



Rhododendrons and A:-aleax. lil varielies of grafted Rhododendrons 



are being grown al the station this year, and ."0 of the best varielies hâve been 

 selecled for seeding, in ordcr lo ascerlain their gamelle composition, wilh a 

 View lo future experiments. Spécial attention has been given lo the recenlly 

 inlroduced « Pink Pearl », a ncw break in Rhododendrons, much superior to 

 olher varielies in size of flowers and gênerai vigour. R is possible Ihat this 

 hybrid, when selfed, may segregate some useful novelties. 



An inleresling yellow variety of Rhododendron has recenlly appeared 

 hère amongsl some hybrid seedlings, which may be the forerunner of a new 

 race of yellow Rhododendrons. \i\ altempl is also being made to secure homo- 

 /vofous lines of some of Ihe liesl forms of Aznlr/i sincn^is in dilTerenl shades of 



Berheri>i. - Bo^beris X stennjdiylla. a garden hybrid of/î. Dfinrinii and H. 

 cmpelrifolia, has been seeded hère in the open for many years. and a report of 

 the extraordinary variability of Ihe seedlings was made al our firsl Conférence 

 in London l'J years ago. .M Ihat lime Mendel's work was of course (juite iink- 

 iiowii, and we did iiol realisi' liien as wc <lo now. Ihat liiis variabilily in Ihe 



