630 DR. M. T. MASTERS: GENERAL VIEW 
The apophysis is lancet-shaped on the free border, rather flat, 
greyish, with a brownish umbo. 
73. Prxvs contorta, Loudon (1838) ; Sargent, Silva, xi. (1897) 
p. 89, tab. 567; Masters in Gard. Chron. 1883, p. 45, fig. 5. 
A species growing near the coasts of Northern California, 
Vancouver, and Alaska. Inland it grows on the mountains of 
the “Sequoia” region at an altitude of 8500 feet, and there 
alters its character, constituting the variety Murrayana, as illus- 
trated by specimens in the British Museum, collected near 
the Colombia River by Macoun. Another variety, with more 
slender foliage and catkins, has received the name Bolandert. 
In the typical P. contorta the cones are ovoid-conic, and the 
small four-sided umbos are provided with a small aculeate 
curved mucro. 
The leaf-section is boat-shaped, flat on the upper surface, with a 
layer of hypoderm beneath the epidermis. The mesophyll-cells 
have infolded walls. The resin-canals are in the substance of 
the leaf and surrounded by stereome-cells. The section of the 
meristele is elliptic and surrounded by an endoderm-layer of 
about 50 cells, both in the type and in the variety Murrayana. 
The two divisions of the fibro-vascular bundle are widely separate 
by intervening cellular tissue. 
SPECIES OF WHICH NO SPECIMENS NAVE BEEN SEEN 
BY THE WRITER. 
Pinus recurvata, Rowlee, in‘ Bulletin’ of Torrey Botanical Club, 
xxx. (1903) p. 107—Rowlee describes from the Isle of Pines a 
species which he says resembles P. palustris; but the cones are 
only half as large, and the depressed umbo and straight prickles 
are not like those of the species named. The cones are even 
more unlike those of heterophylla (cubensis). [Shaw refers this 
to P. bahamensis, Griseb.—Note added March 12, 1904.] 
P. yunnanensis, Franchet, in Journ. de Bot. 1899, p- 253. 
A tree described by Franchet as having the habit of P. longi- 
folia, with three leaves to the tuft, each leaf 18—20 cent. long. 
The cones are smaller than those of P. longiflora, being about 
9-10 cent. long, 6-7 broad, ovoid; apophysis rhomboid, promi- 
nent. The species was collected in Yunnan by Father Delavay, 
and seems to resemble P. Massoniana. 
P. vermicularis, Janka, ex Boissier, Flora Orient. v. p. 698. 
? P. Peuke. 
