Page:TheTreesOfGreatBritainAndIreland vol04B.djvu/363

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Alnus
951

A specimen is growing at Milford House, near Godalming, which was planted by the famous botanist and traveller, Phillip Barker Webb. The present owner, R. W. Webb, Esq., informed us in 1905 that it was very healthy, measuring 8 feet in girth, and estimated to be about 50 feet in height.

There is a fine tree growing near the pond in front of the palm-house in Kew Gardens, which is 71 feet high by 5 feet 8 inches in girth. At Tortworth, a tree measures 60 feet high by 6 feet in girth; and at Waterer’s Nursery, Knaphill, Woking, another is 50 feet by 5 feet 10 inches.

At Nuneham Park, Oxford, a tree, growing on hilly dry ground, on the green- sand formation, measures 51 feet by 5 feet 5 inches, and is very thriving. Elwes has seen a tree at Bicton, measuring 65 feet by 5 feet 10 inches, and another at Melbury, where it grows vigorously and fruits.

In the playing fields at Eton, on the banks of the Thames, there are two trees, the larger of which is 4o feet high by 6 feet 4 inches in girth. These were in full foliage on 17th November 1907, having scarcely lost a leaf, and were bearing fruit. They have not developed tall straight stems, as in the other places where the tree is thriving ; and this is probably owing to their position being exposed to easterly and north-easterly winds. At Ponfield, Herts, a young tree 35 feet by 2 feet 4 inches in 1906 is doing well on dry soil; and there is a good specimen in the Cambridge Botanic Garden. Another at Yattendon Court, Berks, is 50 feet by 3 feet 8 inches.

In Scotland it also grows well at the Botanic Gardens, Edinburgh, where there is a tree 60 feet by 5 feet 10 inches; and in the west at Castle Kennedy, and at Monreith, where Elwes saw a tree 30 feet high, bearing cones in September 1906.

There is a fine specimen in the Glasnevin Botanic Garden, which is 64 feet high by 5 feet 4 inches in girth. (A.H.)

ALNUS SUBCORDATA, Caucasian Alder

Alnus subcordata, C. A. Meyer, Verz. Pfl. Kauk. 43 (1831); Winkler, Betulaceæ, 112 (1904).
Alnus cordifolia, Tenore, var. subcordata, Regel, in Mdém. Soc. Nat. Mosc. xiii. 170 (1861), and in DC. Prod. xvi. 2, p. 185, (1868).

A tree, attaining about 60 feet in height. Bark grey, warty on the surface, ultimately scaling at the base of old trunks. Young branchlets pubescent. Leaves (Plate 268, Fig. 5) about 4 inches long and 2½ inches broad, ovate-oblong, rounded and unequal or subcordate at the base, cuspidate-acuminate at the apex; coarsely serrate or bi-serrate in the upper half, finely serrate in the lower half; nerves, about eight pairs, running to the margin; upper surface dark green, slightly pubescent ; lower surface light green, pubescent throughout, the pubescence densest along the nerves and in the axils; petiole, ¾ inch, pubescent. Staminate catkins, three to five in araceme. Cones solitary or several, ovoid-elliptic, about an inch long; nutlets broadly ovoid, with a very narrow wing.

This is a moderate-sized tree, occurring in the province of Talysch in