The. 
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é 
a 
y . 
OF THE GENUS PINUS. 621 
the outer surface. The resin-canals are median, not surrounded 
by stereome-cells. The meristele is elliptic with a branched 
fibro-vascular bundle, the branches separate at the base by fine 
cellular tissue. The cones are clustered, deflexed, obliquely 
ovoid-conic, 7-8 cent. long, with the apophysis thickened equally 
on each side of the terminal, upturned, awl-shaped mucro. The 
scales are not so broad as those in P. attenuata (tuberculata) 
(p. 594). 
65. Pinus cxuausa, Chapman; Sargent, Silva, xi. (1897) 
p- 127, tab. 582; Beissner, Carl Mohr, in Garden and Forest, 
Aug. 20, 1890, also Sudworth in the same journal, April 6, 
1892, p. 162. 
P. inops var. clausa, Engelmann. 
A species native to the coast and sand districts of Florida. 
The section of the leaves is semiterete, convex beneath, flat 
above, with a double layer of hypoderm. The cells of the 
mesophyll have infolded walls. Resin-canals median, sur- 
rounded by stereome-sheath, meristele transversely elliptic ; 
fibro-vascular bundle branched, its branches separated by the 
cells of the pericycle, Endoderm-cells about 49, thickened at 
the points of contact. 
Buds slender, cylindric; male flowers congested; cones 
shortly stalked, spreading or deflexed, 6-8 cent. long, oblong- 
conic, persistent, and often more or less embedded by the 
over-growing wood of the branch; apophysis convex, trans- 
versely keeled, entire, with a central subulate mucro. The 
Scales remain closed for several years, the vitality of the seed 
being thus preserved from five to nine years. The object of 
this serotinous habit is not clearly ascertained. It is discussed 
by Sudworth in the paper above referred to. (See also p. 595.) 
66. P. maritima, Linn.; Miller, Dict. ed. viii. (1768) n. 7 
Poiret, 1804; not of Lambert nor of Aiton. 
P. silvestris, Miller, 1. c. n. 1, not of Linneus. 
P. Pinaster, Solander, in Aiton, Hort. Kew. ed. i. vol. iii. 
p. 367; Parlatore; Sargent, Silva, xi. (1897), adnot. p. 73 
Beissner, et auct. plurim. 
P. Laricio, Santi (1795), not of Poiret. 
P. syrtica, Thore, Promenade en Gascogne. 
This well-known Mediterranean species is generally known in 
cultivation under.the name Pinaster. In Linneus’s herbarium it 
