[Crown Copyright Reserved.} 
ROYAL BOTANIC GARDENS, KEW. 
BULLETIN 
MISCELLANEOUS INFORMATION, 
No. 5.1 (1918. 
XXV.—GARDEN NOTES ON NEW TREES 
AND SHRUBS. 
(With Plates.) 
W. J. BEAN. 
AIT.—A Himalayan Tree Hazel. 
Corylus Jacquemontii, Decaisne. (C. lacera, Wallich, cat. No. 
2798) [Corylaceae]. 
Owing no doubt to the great heat of the summer of 1911 and the 
consequent thorough ripening of the wood, the crop of hazel nuts at 
Kew in the autumn of 1912 was very abundant. Several trees 
that had never before borne fruit did so then. Amongst them was 
a tree received in 1898 from Messrs. Van Geert as Corylus Colurna. 
The fruit of this proved it to be the interesting tree found wild in 
N.W. India (Cashmere, &c.), named C. Jacquemontii by Decaisne 
and previously C. lacera by Wallich. Wallich’s name, however, 
was never published, whilst Decaisne gave a full description and 
figure in Jacquemont, Voyage dans I’Inde, p. 160, t. 160. 
C. Jacquemontii is undoubtedly very closely allied to C. Colurna 
and J. D. Hooker in the Flora of British India, vol. v., p. 625, 
sinks it under that species without distinguishing it as a variety, 
although from a note on the cover he appears to have contemplated 
doing so. It is distinct from the C. Colurna of Asia Minor, 
Greece and Hungary, as is shown by the drawing published 
herewith. The leaves are larger, being often over 6 inches long, 
sometimes 8 inches, and as much as 5 inches wide ; the blade is not 
so rounded as in C. Colurna and more strictly obovate, the margins 
too are more conspicuously lobed towards the apex, the lobes more 
acuminate and sharply toothed. The most distinctive feature, 
however, is the involucre of the fruit. In C. Colurna this is 
covered densely with gland-tip bristles, especially on the 
subulate lobes, which give the whole often quite a mossy aspect ; 
(29866—6a.) Wt. 212—780, 1125, 7/13, D&S, 
