ioo8 The Trees of Great Britain and Ireland 



and third years. Buds cylindro-conic, an inch long. Leaves 6 to lo in. long, 

 dark green, densely crowded on the greater part of the branchlets. directed 

 outwards and forwards. 

 27A. Pinus ponderosa, Lawson, var. Jeffreyi, Vasey. California and Lower 



California. See p. 1072. 

 Branchlets stout, glaucous, becoming dark-coloured in the second and third 

 years. Buds stout, cylindro-conic, reddish brown, an inch long, with scales less 

 resinous and their points more free than in the type. 



1 1 Leaves less than 6 in. long. 



28. Pinus tuberculata, Gordon. Oregon, California. See p. 1077. 



Branchlets reddish brown, not glaucous. Buds cylindrical, pointed, an inch 

 long. Leaves 4 to 5 in. long, rigid, dark green ; basal sheath \ in. long. 



29. Pinus radiata, Don. Coast of California, near Monterey. Islands of Santa 



Cruz, Santa Rosa, and Guadalupe. See p. 1079. 

 Branchlets reddish brown, not glaucous. Buds cylindrical, pointed, i to f in. 

 long. Leaves 4 to 5 in. long, slender, flexible and soft in texture, light green, 

 densely crowded on the branchlets ; basal sheath \ inch long. 



** Points of the bud-scales free and slightly spreading, not refiexed. 



30. Pinus patula, Schlechtendal et Chamisso. Mexico. See p. 1085. 



Branchlets glaucous. Buds cylindro-conic, ^ to f in. long. Leaves 6 to 9 in. 

 long, filiform, soft and very slender, drooping ; basal sheath, i in. long. 



31. Pinus Teocote, Schlechtendal et Chamisso. Mexico. See p. 1086. 



Branchlets glaucous, the epidermis of the decurrent pulvini peeling off in the 

 second and third years. Buds cylindro-conic, resinous, f in. long. Leaves 

 4 to 8 in. long, rigid, spreading ; basal sheath an inch long. 



32. Pinus rigida^ Miller. Eastern Canada, and North-eastern United States. 



See p. 1087. 

 Branchlets not glaucous. Buds cylindro-conic, i to f in. long. Leaves 

 l\ to 4 in. long, rigid ; basal sheath f to ^ in. long. 



33. Pinus serotina} Michaux. South-eastern and Southern United States. 



See p. 1090. 

 Distinguishable from P. rigida by the different cones and longer leaves, 

 6 to 10 in. long ; but in cultivated trees in England the leaves are as short as in 

 that species. 

 * * * Buds non-resinous ; bud-scales with free, fimbriated, and recurved points. The 

 apex of the second years branchlet is marked with a conspicuous sheath of the 

 persistent recurved bud-scales. 



34. Pinus palustris. Miller. South-eastern and Southern United States. See 



p. 109 1. 

 Branchlets stout, orange brown. Buds i^ to 2 in. long, with silvery white 

 scales. Leaves 8 to 18 in. long, densely crowded on the branchlets; basal 

 sheath f to i in. long. Scale-leaves persistent. 



' Adult trees of both these species are readily recognisable by the adventitious shoots on the old branches and stems. 

 Occasionally the buds in P. Hgida are very resinous, with closely appressed scales. 



