269 
at its base was pure hawthorn, but became transformed towards 
the extremity into what was identical with, or very near to, 
-m. Asnieresit. 
As an ornamental tree C.-m. Asnieresii is much to be recom- 
mended, flowering freely and possessing an exceptionally graceful 
habit. C.-m. Dardari, whilst the more interesting in its marked 
tendency to sport, is not so attractive a tree. 
A new interest has been aroused in the study of graft hybrids 
owing to the recent researches of Professor H. Winkler of 
Tiibingen i in grafting the black nightshade (Solanum pchaia’ on the 
Tomato (Lycopersicum esculentum) and vice versa. The accounts 
of these experiments have been recently summarised in English by 
Professor D. H. Campbell*, so that it is unnecessary to ‘refer to 
them in detail here. It seems clear however that in some cases the 
hybrids obtained by Winkler were of the nature of “ periclinal” 
hybrids, that is to say, that the outer tissues of the shoot produced - 
by grafting belong to one parent while the inner tissue are those o 
the other. Macfarlanet i in his careful work on the structure of 
Laburnum Adami found that the pepe — were strikingly 
like those of C. purpureus while the imer e like those of the 
aburnum, and an investigation of the Cesta hybrids has 
revealed a similar state of affairs. 
EXPLANATION OF PLATES. 
1. Three sprays gathered from one specimen of Cratae go-mmengeret 
Dardari at Kew on June 1, 1911: C.-m. Asnieresii (top); Medlar, 
Mespilus germanica (middle) ; C.-m. Dardari (bottom). 
Crataego-mespilus Asnieresii at Kew, about 10 feet high, 
photographed June I, 1911 
XXXVI—DECADES KEWENSES 
PLanrarum Novarum 1n Hersario Horti Reais 
CONSERVATARUM. 
DECAS LXI. 
-601. Osbeckia Hildebrandii, Stapf [Melastomaceae-Osbeckieae] ; 
affinis OQ. stellataec, D. Don, sed foliis subtus densius pilosis, bracteis 
amplis, calycis indumento Biot distincta, 
Caulis acute quadrangularis, strigulosus. Folia ovata vel oblonga, 
acuta, basi subacuta vel rotundata, 10-20 cm. longa, 3°5—7 cm. lata, 
herbacea, supra saturate viridia, subadpresse hispidula, infra pallida, 
in nervis venisque hirta, 7-nervia, nervis venisque transversis 
admodum prominentibus, margine rigide ciliata, in costa utrinque 
glandulis purpureis breviter cylindricis vel globosis obsita ; petiolus 
® QCampbell, D. H. “The Nature of Graft Hybrids” in The epee 
Naturalist, xlv., January 1911, , PP- 41-53 ; got hg Baur “ Einfiihrung in 
figs. 
Macfarlane, J. M. ‘ mparison of the aie Structures of Plant Hybrids 
with those of "thelt Parents and its bearing on Biological Problems,” Trans. 
Roy. Soc., Edinburgh, xxxvii., 1895, pp. 203-286. ame 
