Britain.

Plate XXXVI.

Fig. 307, Cone. Fig. 308, Conelet. Fig. 309, Leaf-fascicle and
magnified leaf-section. Fig. 310, Branchlet with drooping leaves.

[Illustration: PLATE XXXVI. P. PATULA (307-310), GREGGII (311-314)]

61. PINUS MURICATA

1837 P. muricata D. Don in Trans. Linn. Soc. xvii. 441.
1848 P. Edgariana Hartweg in Jour. Hort. Soc. Lond. iii. 217.

Spring-shoots multinodal. Leaves binate, from 10 to 15 cm. long;
resin-ducts medial, hypoderm biform. Scales of the conelet prolonged
into a triangular spine. Cones from 5 to 9 cm. long, in verticillate
clusters, sessile, reflexed, ovate-conic, oblique, serotinous; apophyses
lustrous nut-brown, abruptly much larger on the posterior face of the
cone, each armed with a formidable spine varying in size with the
varying size of the apophysis.

This species grows on the coast of California, in scattered stations
between Mendocino and San Luis Obispo Counties, and on the northwest
coast of Lower California and on Cedros Island. It is recognized by
its oblique cones, conspicuously spinose, indefinitely persistent and
very serotinous. The unequal development of its cone-scales
distinguishes the cone from the more symmetrically developed cone of
P. pungens. Fruiting trees of P. muricata may be seen in the Royal
Gardens at Kew.

Plate XXXVII.

Fig. 315, Cone. Fig. 316, Leaf-fascicle and magnified leaf-section.

62. PINUS ATTENUATA

1847 P. californica Hartweg in Jour. Hort. Soc. Lond. ii. 189,
(not? P. CALIFORNIANA, Loiseleur).
1849 P. tuberculata Gordon in Jour. Hort. Soc. Lond. iv. 218,
f. (not D. Don).
1892 P. attenuata Lemmon in Mining & Sci. Press, lxiv. 45.

Spring-shoots multinodal. Bark-formation late, the branches and upper
trunk smooth. Leaves ternate, from 8 to 16 cm. long; resin-ducts medial
or with one or more internal ducts, hypoderm biform. Scales of the
conelet prolonged into a triangular spine. Cones from 8 to 16 cm. long,
in verticillate clusters, sessile, reflexed, long-ovate, oblique,
persistent and remarkably serotinous; apophyses lustrous tawny yellow,
abruptly larger and more prominent on the posterior face of the cone,
where they are usually prolonged into acute pyramids with a small
incurved spine.

A tree of slender habit and gray-green foliage, the trunk studded with
persistent nodal cone-clusters; growing on dry mountain slopes, from
sou