Pinus 



1005 



* Leaves serrate, with median resin-canals. 



8. Pinus Cembra, Linnaeus. Alps, Carpathians, North-Eastern Russia, Siberia. 



See p. 1035. 

 Branchlets covered with a dense orange-brown shaggy tomentum. Buds 

 ovoid, acuminate, resinous. Leaves 2\ to 3^ in. long, with few serrations at 

 the tip. 



9. Pinus koraiensis, Siebold et Zuccarini. Amurland, Manchuria, Korea, Japan. 



See p. 1041. 

 Branchlets and buds as in P. Cembra. Leaves with numerous sharp serra- 

 tions at the tip, otherwise as in P. Cembra. 



10. Pinus Armandi, Franchet. China. See p. 1043. 



Branchlets olive green, glabrous or with minute scattered hairs. Buds with 

 free or appressed scales. Leaves 4 to 6 in. long, spreading, and often bent, as 

 in P. excelsa. 



* * Leaves entire in margin, with marginal resin-canals. 



11. Pinus pumila,'R.&g&\. Kamtschatka, Eastern Siberia, Amurland, Saghalien, 



Kurile Isles, Japan. See p. 1045. 

 Buds and branchlets as in P. Cembra. Leaves^ also similar, but usually- 

 shorter and differing in the position of the resin-canals. 



12. Pinus flexilis, ]a.mes. Western North America. Seep. 1046. 



Branchlets glabrous or covered with a minute brown soft pubescence. Buds 

 ovoid, sharp-pointed, resinous. Leaves 2 to 3 in. long, stout, rigid, curved, 

 sharp-pointed. 



13. Pinus albicaulis, Engelmann. Western North America. Seep. 1048. 



Scarcely distinguishable from P. flexilis in the absence of cones, though the 

 branchlets apparently differ in their scattered minute stiff pubescence. 



B. Leaf-sheath entirely deciduous. Leaves in threes. 



§ 3. Gerardian^, Engelmann, Plane-bark Pines. 



Leaves serrulate, with marginal resin-canals. Cones sub-terminal ; scales 

 much thickened, each with a dorsal umbo. Seeds large, edible ; wing reduced 

 to a narrow deciduous rim, remaining on the scale when the seed falls. 



14. Pinus Bungeana, Zuccarini. China. See p. 1050. 



Branchlets glabrous, green, smooth. Buds spindle-shaped, with scales free 

 at their tips. Leaves 3 in. long, shining green, rigid, with the basal sheaths 

 deciduous in the first year. 



15. Pinus Gerardiana, Wallich. Western Himalayas. Seep. 1052. 



Branchlets glabrous, green, smooth. Buds conic, acuminate, resinous. 

 Leaves 3 to 4 in. long, duller in colour and less rigid than in P. Bungeana, with 

 the basal sheaths deciduous in the second year. 



' In the insular form of this species, the leaves are indistinctly serrulate in margin. 



