anistan, and so highly
prized for its nuts that it is rarely felled for its wood. It grows in
dry regions and rarely attains a height of 20 metres. Attempts to
cultivate this species, even in the milder parts of Great Britain,
have generally failed.

The apophysis of the cone varies much in prominence (figs. 134, 135),
but the peculiar seed is invariable and quite unlike that of any other
Pine. The general color of the trunk at a distance is silver-gray.

Plate XIV.

Fig. 133, Cone. Fig. 134, Cone-scale with adhering seed-wing. Fig.
135, Cone-scale of flatter form. Fig. 136, Seed and wing. Fig. 137,
Leaf-fascicle and magnified leaf-section.

[Illustration: PLATE XIV. P. GERARDIANA (133-137), BUNGEANA (138-142)]

=VI. BALFOURIANAE=

Seeds with long effective wings. Leaves entire, in fascicles of 5, the
sheath deciduous.

The two species known as Foxtail Pines are alike in their short entire
falcate leaves, persisting for many years and forming long dense
foliage-masses. They differ in the armature of their cones and in
their seed-wings. The presence of both adnate and articulate wings in
these closely related species suggests that these two forms of wing
are not fundamentally distinct.

Cone-scales short-mucronate, the seed-wing adnate 18. Balfouriana.
Cone-scales long-aristate, the seed-wing articulate 19. aristata.

18. PINUS BALFOURIANA

1853 P. Balfouriana Balfour in Bot. Exp. Oregon, 1, f.

Spring-shoots somewhat puberulent. Leaves from 2 to 4 cm. long,
persistent for many years; stomata ventral only; resin-ducts external.
Scales of the conelet short-mucronate. Cones from 7 to 12 cm. long,
tapering to a rounded apex, short-pedunculate; apophyses dark
terracotta-brown, tumid, the umbo bearing a short recumbent prickle;
seed with a long adnate wing.

An alpine species growing often at the timber-limit. It is found in
two distinct stations in California, on the northern Coast Range and
on the southern Sierras. It is not often cultivated, but young plants
may be seen in the Arnold Arboretum and in the Royal Gardens at Kew.

Plate XV.

Fig. 147, Cone, seed and enlarged cone-scale. Fig. 148,
Leaf-fascicle. Fig. 149, Magnified leaf-section. Fig. 150, A branch
with persistent leaves.

19. PINUS ARISTATA

1862 P. aristata Engelmann in Am. Jour. Sci. ser. 2, xxxiv. 331.
1871 P. Balfouriana Watson in King's Rep. v