Pinus 1009 



35. Pmus Taeda, Linnd&us. South-eastern and Southern United States. Seep. 1094. 



Branchlets glaucous. Buds | in. long, with brown scales. Leaves 6 to 9 in. 

 long, spreading ; basal sheath nearly i in. long. Scale-leaves persistent. 



36. Pinus canariensis, Smith. Canary Islands. See p. 1096. 



Branchlets yellow, not glaucous. Buds f in. long, with reddish brown 

 scales. Leaves 7 to 12 in. long, densely crowded on the branchlets, slender, 

 flexible. 



7. Leaves in twos ; in one species, clusters of three leaves also occur. 



See § 8 and § 9. 

 § 8. Banksia, Mayr. 



Cones lateral. Shoots multinodal, a vigorous branch showing a whorl of buds, 



branchlets, or cones in the middle of each year's shoot, in addition to the 



subterminal whorl. 



* Leaves in twos and in threes, on the same branch. 



37. Pinus echinata. Miller, South-eastern United States. See p. 1098. 



Branchlets slender, brittle, glaucous, with the bark in the third year 



exfoliating in large flakes. Buds \ in. long, brownish, shining, with resinous 



appressed scales. Leaves 3 in. long, resin -canals median ; basal sheath 



f in. long. 



** Leaves always in pairs. 



f Buds non-resinous, with free and recurved points to their scales. 



38. Pinus halepensis, Miller. Mediterranean region, Caucasus. See p. 1099. 



Branchlets glaucous. Leaves 2J to 4 in. long ; resin-canals marginal ; 

 basal sheath ^ in. long. In var. Brutia the leaves are 4 to 6 in. long. 

 1 1 Buds resinous, with appressed scales. 



39. Pinus muricata, Don. California. See p. 1 104. 



Branchlets stout, reddish brown. Buds cylindrical, f to i in. long ; scales 

 encrusted with white resin. Leaves 4 to 6 in. long, stout, rigid ; resin-canals 

 median ; basal sheath \ in. long. 



40. Pinus pun£-ens, Michaux. Alleghany Mountains. Seep. 1106. 



Branchlets shining brown. Buds cylindrical, | in. long. Leaves 2 to 2^ in. 

 long, stout, rigid, very sharp - pointed ; resin -canals median; basal sheath 

 I in. long. 



41. Pinus virginiana, Miller. Eastern United States. Seep. 1107. 



Branchlets slender, glaucous violet. Buds cylindrical, | in. long. Leaves 

 \\ to 3 in. long ; resin-canals median ; basal sheath ^ in. long. 



42. Pinus Banksiana, Lambert. Canada, east of the Rockies ; United States, 



Minnesota to Maine, Seep. 1 109. 

 Branchlets slender, greenish. Buds ovoid, \ in. long. Leaves i in. long ; 

 resin-canals median ; basal sheath i to ^ in. long. 



§ 9. Pinaster, Mayr. 



Cones subterminal. Shoots uninodal, a branch, even when vigorous, 

 showing only one whorl of branchlets, buds, and cones, in each year's shoot, 

 close to its apex. Leaves always in pairs, 

 v 



