PINACEAE. PINUS KORAIENSIS 15 



belong to the New and 23 to the Old World. Sargent (Silva N. Am. XI. 2 [1897]) 

 gives the total number of species as about 70; Elwes & Henry (Trees Gr. Brit. 

 & Irel. V. 1003 [1910]) estimate the number at 80. In Japan six species are in- 

 digenous, of which three also grow on the mainland of eastern Asia. 



KEY TO THE JAPANESE SPECIES 



Wood soft, close-grained; bark thin, smooth, as a rule scaly on the trunks of old trees; 

 leaves normally five in each fascicle with one fibro-vascular bundle, sheaths 



deciduous Soft Pines. 



Seeds wingless. 



Cone indehiscent, subsessile, deciduous; shoots densely hairy. 

 Leaves serrate; resin-ducts medial, confined to the angles; cone from 7 to 15 cm. 



long P. KORAIENSIS. 



Leaves remotely serrulate; resin-ducts usually external; cone from 3 to 5 cm. 



long P. PUMILA. 



Cone dehiscent, long-peduncled; shoots glabrous; leaves serrulate; resin-ducts exter- 

 nal, external and medial, or medial; cone from 4.5 to 20 cm. long. 



P. Armandi. 

 Seeds winged. 



Cone dehiscent, persistent, subsessile; shoots pubescent or glabrous; leaves with 



resin-ducts external and dorsal P. parviflora. 



Wood heavy, coarse-grained; bark thin and scaly on upper parts, deeply furrowed on the 

 trunk; leaves normally two in each fascicle, with two fibro-vascular bundles, sheaths 



persistent Hard Pines. 



Bark on upper parts of the trunk reddish, terminal buds reddish; shoots more or less 



pruinose; leaves slender, gray-green; resin-ducts external . . P. densiflora. 



Bark blackish gray; terminal buds long, very white; shoot yellow-brown; leaves stout, 



dark green; resin-ducts medial P. Thunbergii. 



PINUS KORAIENSIS S. & Z. 



Plates VI and VII 



Pmus koeaiensis Siebold & Zuccarini. Fl. Jap. II. 28, t. 116 exclude fig. 1-4 

 (1844). Endlicher, Syn. Conif. 172 (1847). Lindley in Gard. Chron. 1861, 

 1114. J. G. Veitch in Gard. Chron. 1862, 309. Murray in Proc. Hort. Soc. Lond. 

 II. 266, fig. 1-12 (1862); Pines & Firs Jap. 5, fig. 1-12 (1863). Miquel in Ann. 

 Mus. Lugd.-Bat. III. 166 (1867); Prol. Fl. Jap. 330 (1867). Franchet & Sava- 

 tier, Enum. PI. Jap. I. 465 (1875). Masters in Jour. Linn. Soc. XVIII. 504 

 (1881). Veitch, Man. Conif. 178, fig. 40 (1881). Mayr, Monog. Abiet. Jap. 

 73, t. 5-6, fig. 18 (1890); Fremdl. Wald- u. Parkb. 386 (1906). Shirasawa, Icon. 

 Ess. For. Jap. I. 12, t. 2, fig. 17-32 (1900). Palibin in Act. Hort. Petrop. XIX. 

 135 (Consp. Fl. Kor.) (1901). Komarov in Act. Hort. Petrop. XX. 183 (Fl. 

 Mandsh. I.) (1901). Matsumura, Ind. PI. Jap. II. pt. 1, 14 (1905). Clinton- 

 Baker, III. Conif. I. 28, t. (1909). Elwes & Henry, Trees Gr. Brit. & Irel. V. 

 1041 (1909). Nakai inJour. Coll.Sci. Tokyo, XXXI. 379 (Fl. Kor. pt.2) (1911). 

 Shaw, Gen. Pinus, 26, t. 8, fig. 85, 86 (1914). 



f Pinus Strobus Thunberg, Fl. Jap. 275 (not Linnaeus) (1784). 



Pinus Cembra, p excelsa Maximowicz in Bull. Phys.-Math. Acad. Sci. St. Peters- 



bourg, XV. 141 (1857). 

 Pinus mandshurica Ruprecht in Bull. Phys.-Math. Acad. Sci. St. Petersbourg, XV. 



