The northern limit of the range of P. caribaea extends from the coast of southeastern S. Carolina through southeastern Georgia and southern Alabama to southeastern Louisiana. It is associated with P. palustris, taeda, serotina, echinata and glabra in this part of its range. It continues through Florida, where it encounters P. clausa. On the Bahamas it is the only Pine. On the Isle of Pines it finds in P. tropicalis another associate. It also grows in Honduras and Guatemala. The wood and resin of this species are of such excellent quality that no commercial distinction is made between P. caribaea and P. palustris. Plate XXIX. Fig. 250, Cone from the Isle of Pines. Fig. 251, Small form of cone. Fig. 252, Large form of cone and binate leaf-fascicle. Fig. 253, Conelet. Fig. 254, Magnified sections of leaves from binate and ternate fascicles. Fig. 255, Habit of the tree, contrasted with a tree of P. palustris in the middle-distance. [Illustration: PLATE XXIX. PINUS CARIBAEA] 45. PINUS TAEDA 1753 P. taeda Linnaeus, Sp. Pl. 1000. 1788 P. lutea Walter Fl. Carol. 237. 1903 P. heterophylla Small, Fl. Southeast. U. S. 28 (not Sudworth). Spring-shoots multinodal. Leaves in fascicles of 3, from 12 to 25 cm. long; resin-ducts medial, sometimes with an internal duct, hypoderm biform, endoderm with thin outer walls. Conelets erect, their scales prolonged into a sharp point. Cones from 6 to 10 cm. long, ovate-conic, symmetrical; apophyses dull pale nut-brown, rarely lustrous, elevated along a transverse keel, the whole umbo forming a stout triangular spine with slightly concave sides. The species ranges from southern New Jersey to southern Arkansas, Oklahoma, eastern Texas and southwestern Tennessee, but does not occur in the lower half of the Florida peninsula. It is an important timber-tree, manufactured into all descriptions of scantlings, boarding and finish, but the wood is of various qualities. It may be recognized by the spine of its cone in both years of growth. Excepting the formidable armature of the cone of P. pungens, the spines are the strongest and most persistent of all the species of eastern North America. Plate XXX. Fig. 264, Cone. Fig. 265, Leaf-fascicle. Fig. 266, Magnified leaf-section. Fig. 267. Magnified scales of the conelet. 46. PINUS GLABRA 1788 P. glabra Walter, Fl. Carol. 237. Spring-shoots multinodal. Bark-formation late, the upper trunks of mature trees smooth. Leaves in fascicles of 2, from 9 to 12 cm. long; resin-ducts medial, hypoderm weak, sometimes of a single row, biform when of two rows, endoderm with thin outer walls. Conelets reflexed, mucronate. Cones from 4 to 7 cm. long, reflexed, ovate, symmetrical, deciduous on some trees, persistent on others; apophyses pale dull nut-brown, thin or slightly thickened, the prickle usually deciduous.