122 CONIFERJE. Pinus. 



Wood light, soft, not strong, brittle, close-grained, compact ; bands of 

 small summer cells not broad, resinous, conspicuous ; color light brown, 

 the very thick sap-wood nearly white ; locally somewhat used for fuel. 



369. Pinus tuberculata, Gord. 

 Knob-cone Pine. 



Valley of the Mackenzie River, Oregon, south along the western slope 

 of the Cascade and Sierra Nevada Mountains, and in the California Coast 

 Ranges from the Santa Cruz to the San Jacinto Mountains. 



A tree 18 to 22 metres in height, with a trunk 0.60 to 0.90 metre in 

 diameter, or, rarely, reduced to a low shrub ; dry, gravelly ridges and 

 slopes from 2,500 (San Bernardino Mountains) to 5,500 (Mount Shasta) 

 feet elevation ; not common. 



Wood light, soft, not strong, brittle, coarse-grained, compact; bands of 

 small summer cells very broad, not conspicuous ; resin passages numerous, 

 large, prominent ; medullary rays numerous, thin ; color light brown, the 

 thick sap-wood nearly white or slightly tinged with red. 



370. Pinus Taeda, L. 



Loblolly Pine. Old-field Pine. Rosemary Pine. 



Southern Delaware, south to Cape Malabar and Tampa Ray, Florida, 

 generally near the coast, through the Gulf States to the valley of the 

 Colorado River, Texas, and extending north to the valley of the Arkansas 

 River. 



A tree 24 to 46 metres in height, with a trunk 0.90 to 1.50 metres in 

 diameter ; low, wet clay or dry, sandy soil ; springing up on all aban- 

 doned lands from Virginia southward, and now often replacing in the 

 Southern pine-belt the original forests of Pinus palustris ; in eastern 

 North Carolina rarely on low, rich swamp ridges, here known as rose- 

 mary pine and attaining its greatest development and value. 



Wood light, not strong, brittle, verj coarse-grained, not durable; bands 

 of small summer cells broad, very resinous, conspicuous; resin passages 

 few, not prominent; medullary rays numerous, obscure ; color light brown, 

 the very thick sap-wood orange, or often nearly white ; largely used for 

 fuel and manufactured into lumber of inferior quality. 



371. Pinus rigida, Mill. 



Pitch Pinr. 



New Brunswick to the northern shores of Lake Ontario, south through 

 the Atlantic States to northern Georgia, extending to the western slope of 

 the Alleghany Mountains in AVest Virginia and Kentucky. 



A tree 12 to 24 metres in height, with a trunk 0.60 to 0.90 metre in 

 diameter ; dry, sandy, barren soil, or less commonly in deep, cold swamps ; 

 vci\ common. 



