Juglans 277 



JUGLANS CORDIFORMIS, Cordate Walnut 



Juglans cordiforviis, Maximowicz, iWel. Biol, viii, 635, cudi fig. (1872); Shirasawa, Icon. Ess. Forest 

 Jap., text 35, t. 17 (1899); Rehder, Mit/keil. Deut. Dendrol. Gesell. 1903, p. 117 ; Gardeners 

 Chronicle, 1901, xxx. 292, Supplementary Illustration. 



Juglans Sieboldiana, var. cordiforviis, Makino, in Tokyo Bot. Mag. 1895, p. 313. 



A tree attaining 50 feet in height and 6 feet in girth. Bark, according to 

 Shirasawa, remaining smooth for a long time, becoming fissured with age. 



Leaves with eleven to thirteen leaflets, which are sub-opposite, oblong with 

 unequal sides, acute or acuminate at the apex, cordate at the base, sessile or sub- 

 sessile, the petiolule not exceeding ^^ inch, the base of the leaflet extending over the 

 rachis so that the leaflet appears to be more sessile than is the case in J. Sieboldiana ; 

 serrations fine, shallow, irregular, directed forwards and ciliate ; upper surface finely 

 pubescent, with only tufted hairs ; lower surface pale in colour, pubescent, with 

 numerous stellate hairs, dense along the midrib on which the hairs are glandular ; 

 rachis with densely glandular long reddish hairs, sessile glands being absent. 

 Young shoots covered with long white hairs, which are tipped with red glands and 

 are much denser than in J. Sieboldiana ; no sessile glands visible. Leaf-scar as in 

 that species. 



Flowers : male catkins twelve inches long or more ; female catkins about five 

 inches long, bearing seven to twelve flowers. 



Fruit globose ; nut heart-shaped, much flattened, sharply two-edged, with a 

 shallow longitudinal groove in the middle of each flattened side, smooth over the 

 surface, rather thin-shelled. 



Identification 



Readily distinguished in summer by the cordate leaflets and the young shoots 

 densely covered with long white hairs, which bear red glands at the tips. See under 

 Jtiglans Sieboldiana. 



In winter the following characters are available: — Twigs stout, brown, covered 

 with long glandular hairs, which tend, however, to fall oft' from the lower part of the 

 shoot. Leaf-scar large, set slightly obliquely on pulvini which are scarcely elevated, 

 obovate with two lateral lobes and notched above ; the upper margin with a trans- 

 verse raised band of pubescence ; bundle-dots in three groups. Terminal bud conical, 

 but compressed laterally, brown, densely pubescent, the two outer scales lobed at the 

 apex. Lateral buds often two superposed, small, brown, ovoid, arising from the 

 twigs at an angle of 60°, densely pubescent. Pith large, brown, with wide chambers. 



Distribution 



According to Maximowicz, this species occurs in Nippon. Shirasawa says that 

 it is spread along the banks of rivers in the temperate regions of Japan, being rare in 



