2644 



PINUS 



PINUS 



Min. long. N. J. to N. C. and Tenn. S.S. 11:584 

 Hardy as far north as Mass., but of little ornamental 

 value. 



39. clausa, Vasey (P. inops var. clausa, Engelm.). 

 SAND PINE. SPRUCE PINE. Figs. 2977, 2978. Tree, to 

 20, occasionally to 70 ft., with slender spreading 



2980. Pinusrigida 



No. 45. 



branches: branchlets red-brown: winter buds oblong, 

 obtuse, not or little resinous: Ivs. slender and flexible, 

 acute, dark green, 2-3 in. long: cones short-stalked, 

 often oblique at the base, conic-ovate, dark reddish 

 brown, 2-3 H in. long, remaining closed for 3 or 4 years 

 after ripening and occasionally becoming enveloped by 

 the growing wood of the st. ; apophysis depressed-pyram- 

 idal, conspicuously keeled; umbo with a short, stout 

 spine. Fla. and Ala. near the coast. S.S. 11:582. G.F. 

 5:161. Little known in cult., and not hardy N. 



40. virginiana, Mill. (P. inops, Ait.). SCRUB PINE. 

 JERSEY PINE. Tree, to 40, or sometimes to 100 ft., with 

 slender horizontal or pendulous branches in remote and 

 irregular whorls, forming a broad open pyramid or 

 sometimes flat-topped : winter buds oblong, dark brown : 

 Ivs. stiff, twisted, spreading, acutish, l%-2% in. long: 

 cones conic-oblong, reddish brown, \yr^A i n - long; 

 apophysis little elevated, with a broad depressed- 

 pyramidal umbo ending in a short recurved prickle; seed 

 pale brown, M m - long. N. Y. to S. C., west to Ky. and 

 Ind. S.S. 11:581. Hardy as far north as Mass., but 

 of little ornamental merit. Valuable in the middle 

 states for covering dry and barren soil. 



41. Banksiana, Lamb. (P. divaricata, Dum.-Cours.). 

 JACK PINE. Tree, to 70 ft., usually lower, sometimes 

 shrubby, with slender spreading branches, forming 

 broad open head: branchlets yellowish to purplish 

 brown: winter buds oblong-ovate, light brown, very 

 resinous: Ivs. stiff, twisted, spreading, acute or obtusish, 

 dark or bright green, about 1 in. long: cones conic- 

 oblong, usually curved, pale yellow-brown and lustrous, 

 unarmed, 1^-2 in. long, remaining on the tree for 12- 

 15 years; apophysis flattened, with a transverse line and 

 a small dark obtuse umbo; seed black, %in. long. Hud- 

 son Bay to N. Y., west to Minn. S.S. 11:588. The 

 most northern of all American pines and quite hardy, 

 but not of much ornamental value. 



42. cont6rta, Douglas (P. Boldnderi, Parl. P. con- 

 tdrta var. Boldnderi, Koehne). SCRUB PINE. Fig. 2979 

 (adapted from Pacific R. R. Report). Tree, to 20, 

 occasionally to 30 ft., with rather stout branches form- 

 ing a round-topped compact or open head: branchlets 

 light orange or orange-brown: buds ovate, dark chest- 

 nut-brown, resinous: Ivs. stiff, twisted, acutish, dark 

 green, 1-2 in. long: cones ovate or conic-ovate, very 

 oblique at the base, often remaining closed for several 



years after maturity, 1-2 in. long, light yellowish brown 

 and lustrous, scales of the upper side with elevated, 

 pyramidal apex, the dark umbo ending hi a slender 

 incurved spine. Alaska to Calif., and the variety east 

 to Mont, and Colo. G.C. II. 19:45. S.S. 11:567. Var. 

 latifolia, Engelm. (P. contorta var. Murrayana, Engelm. 

 P. Murrayana, Balfour. P. Boursieri, Carr.), LODGE- 

 POLE PINE, is the form in the Rocky Mts. and a taller 

 tree of pyramidal habit, to 80, or occasionally to 150 

 ft. tall, with longer, lighter green, 13^-3H-in.-long Ivs., 

 less oblique cones. S.S. 11:518. G.C. 1869:191 and 

 R.H. 1869, p. 278 (as P. Tamrac). R.H. 1854, p. 226. 

 In cult., it is usually a bushy low tree and is hardy 

 N., while the typical form is tender. 



43. muricata, Don. PRICKLE-CONE PINE. Tree, to 

 50, occasionally to 90 ft., with stout spreading branches 

 forming a regular pyramid in young trees, in old age 

 usually round-topped and compact: branches orange- 

 brown: winter buds ovate, dark brown, resinous: Ivs. 

 stiff, usually twisted, acute, dark green, 4-7 in. long: 

 cones usually clustered, oblong-ovate, oblique at the 

 base, chestnut-brown, 2-3 Y^, hi. long; scales of the upper 

 side with elongated conical apex terminated by a dark 

 triangular spiny umbo, scales of the lower side more 

 flattened, with slender straight spines; the cones usu- 

 ally remain closed for several years after maturity; 

 seeds almost black, J^in. long. Calif. S.S. 11:585, 586. 

 G.F. 10:235. F.S. 5, p. 517. G.C. II. 21:48, 49, 53; 

 111.45:259-61. Gn. 59, p. 129. G.M. 54:977 Hand- 

 some pine, with regular, pyramidal head; not hardy N. 



44. serotina, Michx. POND PINE. MARSH PINE. 

 Tree, to 50, or occasionally to 80 ft.: branchlets dark 

 orange-color: Ivs. 3, rarely 4, slender, dark green, 6-8 

 in. long, with stomata on all 3 faces: cones subglobose 

 to ovate, short-stalked or nearly sessile, rounded or 

 pointed at the apex, light yellow-brown, 2-2 }/% in. 

 long, remaining closed for one or two years after 

 maturity; scales thin with depressed apophysis and a 

 small slender, mostly deciduous prickle; seeds with the 

 wing about %in. long. N. C. to Fla. S.S. 11 : 580. Not 

 hardy N. 



45. rigida, Mill. PITCH PINE. Figs. 2980-2983. 

 Tree, to 80 ft., with horizontally spreading branches 

 forming an open irregular pyramid: branchlets light 

 brown: winter buds ovate or ovate-oblong, chestnut- 

 brown: Ivs. stiff and spreading, acuminate, dark green, 

 2-5 in. long: cones almost sessile, often in clusters, 



2981. Pinus rigida, with young cones. ( X *A) 



