PINACE^ 451 



distinguished from P. rigida by its more resinous winter buds, 

 much longer leaves (6-8 or rarely 10 in. long), and less prickly, 

 subglobose cones, which often remain closed for years. The cones, 

 however, are variable in shape. In general characters the two 

 trees agree. 



Native of the S.E. United States, from N. Carolina to Florida, 

 growing in wet flats or sandy or peaty swamps. It was intro- 

 duced, according to Loudon, in 1713, but is very rare in cultivation 

 at the present time. 



Wood very similar to that of P. rigida and used for similar 

 work. Turpentine has been obtained from the tree. 



As a rule it succeeds under moister conditions than P. rigida, 

 but like that tree is not well adapted for the British Isles. It 

 requires a warm temperate climate. 



Sargent, The Silva _of N. America, xi, 119 (1902). 



Pinus sinensis, Lambert. (Fig. 99.) 

 Chinese Pine. 



Pinus Cavendishiana, Hort. ; P. Henry i, Masters ; P. leucosperma, 

 Maximowicz ; P. tabulajformis, Carriere ; P, Wilsoni, Shaw. 



A tree varying in habit according to situation, being sometimes 

 a shapely tree of medium size, or in exposed places a low, flat- 

 headed specimen with gnarled branches. Ba7-k usually dark grey, 

 but occasionally on the exposed upper parts of the tree, red and 

 peelmg off in thin sheets. Young shoots without down, glaucous 

 at first, afterwards light brown. Winter buds oblong, pointed 

 with closely pressed scales. Leaves in pairs or in threes, often 

 varying in number on the same plant, erect or spreading, densely 

 crowded on the branchlets, 4-6 in. long, margins finely toothed, 

 apex a sharp, horny point, stomatic line on both surfaces, basal 

 sheath persistent, about | in. long. Cones ovate, obhque, up to 

 2 in. long, persistent ; scales with the terminal portion shining, 

 pale, tawny yellow at first, gradually changing to a dark nut brown. 



Var. densata, Shaw. 



P. densata, Masters ; P. pronainens. Masters. 



This chiefly differs from the type in its oblique cones, the 

 termmal portions of the outer scales being conspicuously swoUen. 

 The common pine of the mountains of W. Szechuen with an 

 altitudinal range higher than that of any other Chinese species. ^ 



Var. yunnanensis, Shaw. 



P. yunnanensis, Franchet. 



Leaves in threes on all the main shoots and much longer than 

 in the type, up to 10 in. long, slender, drooping. Cones up to 

 3^ in. long. It is the low-level pine of the river valleys of S.W. 



1 Wilson, Plantce Wils. II, i, p. 17 (1914). 



