physes.

Plate XXXVII.

Figs. 319, 320, Cones. Fig. 321, Leaf-fascicle and magnified
leaf-section. Fig. 322, Leaf-section from a binate fascicle. Fig.
323, Magnified dermal tissues of the leaf.

[Illustration: PLATE XXXVII. P. MURICATA (315, 316), ATTENUATA (317,
318), RADIATA (319-323)]

=XIII. MACROCARPAE=

Pits of the ray-cells small. Wing-blade of the seed thick. Cones large.
Leaves long and stout.

This group is remarkable for the size of leaf, conelet, and cone. The
peculiar thick seed-wing is more or less obscurely present among the
species of the Insignes, but never attains the development that
differentiates this group from all other Pines. The leaf-section is
notable for the large amount of hypoderm and for the presence of both
thick and thin outer walls of the endoderm-cells, both forms appearing
in the same leaf.

Wing-blade with a short membranous extension.
Leaves in fascicles of 5 64. Torreyana
Leaves in fascicles of 3 65. Sabiniana
Wing-blade with a long membranous extension, leaves
in fascicles of 3 66. Coulteri

64. PINUS TORREYANA

1855 P. Torreyana Parry ex Carriere, Trait. Conif. 326.
1860 P. lophosperma Lindley in Gard. Chron. 46.

Spring-shoots uninodal, pruinose. Leaves in fascicles of 5, from 20 to
33 cm. long, very stout; resin-ducts medial, hypoderm uniform or
somewhat multiform and of many cells. Conelets large, mucronate. Cones
from 10 to 15 cm. long, on stout peduncles, broad-ovate, symmetrical,
somewhat persistent; apophyses chocolate-brown, prominently pyramidal,
the umbo salient and capped with a small mucro; seed-wing short, very
thick, the dorsal surface of the nut spotted with the black remnants of
the spermoderm.

A tree 10 or 12 metres high, often semi-prostrate in exposed
positions, confined to a restricted area on the coast north of San
Diego, California, and to the Island of Santa Rosa. This species
resembles P. Sabiniana in the length of its seed-wing and in the color
of its cone, but is distinct in the short triangular umbo, in its
pentamerous leaf-fascicles and in the mottled dorsal surface of its
nut.

Plate XXXVIII.

Fig. 324, Cone and seed. Fig. 325, Magnified leaf-section.

65. PINUS SABINIANA

1833 P. Sabiniana Douglas in Trans. Linn. Soc. xvi. 747.

Spring-shoots multinodal, pruino