660 Order 127.— -CONIFERJE. 



§ Leaves fascicled In 5s. Cono scales not thickened at the end, unarmed. .No. \ 



§ Leaves in 8s. Cone scales at the. end thickened and prickly or spiny Nos. 2 — 4 



§ Leaves in 2s (rarely '6s). — Scales at the end thickened and spiny Nos. 5 — T 



— Scales at the end thickened, but unarmed. Nos. 8, 9 



1 P. strobus L. White Pine. "Weymouth Pine. Lvs. in 5s, Blender, with 

 very short sheaths ; cones solitary, cylindric, loose, pendant longer than the lvs. — 

 A most majestic and useful forest tree. Can., N. Eng. to Penn. and Wis. The 

 trunk is perfectly straight, covered with a comparatively smooth bark, and, ia 

 some instances, 5 — 7f in diameter, and 80 to lOOf in height without a limb ; then, 

 sending out a few branches, it forms a tufted head far above the surrounding; 

 forest. Branches whorled only in tho young trees. Leaves about 4' long, nume- 

 rous, slender, of a bluish green, forming an extremely soft and delicate foliage. 

 Wood soft, fine-grained, easily wrought, very durable, used in immense quantities 

 in architecture. Tho largo trunks aro ia particular sought for the masts of ships. 

 May. 



2 P. palustri3 Lamb. Long-leaved or Broom Pine. Lvs. in 3s, very long, 

 crowded at the ends of the branches, with elongated,, ragged, half -persistent sheaths ; 

 cone subcylindrical, nearly as long as the leaves ; scales tipped with small, recurved 

 spines. — N. Car. to Fla., very abundant and valuable. Tho trunk is 15 to 20' diam., 

 arising with a slight diminution 40 or 50f to tlie branches, thence 20 to 40f to 

 the summit. Bark slightly furrowed. Lvs. dark green, 10 to 15' in length. Buda 

 very long, whitish. Sterilo aments violet colored, 2' long. Cone 8 to 10' long. 

 Sds. with a thin white testa. Timber strong, compact, resinous and durable, 

 used at tho south in vast quantities. Tho young troes look like brooms. The old. 

 are festooned with the long moss. They }ield nearly all the turpentine and resin 

 of commerce. As fuel it burns with fragrance, splendor and heat. 



3 P. Taeda L. Loblolly Pine. Old-field Pine. Lvs. in 3s, long, light green, 

 with long, subentire sheaths; cones oblong-ovoid, deflexed, half as long as the leaves, 

 the scales tipped with a short inflexed spine. — Abundant in pino woods and sandy 

 fields as a second growth, Va. to Fla. A tall tree, 50 to 80 or even 1001' high, 

 with a wide-spreading summit. Bark thick and very rugged. Lvs. 6 to 10' long, 

 rigid, sheaths blackish, 6" long. Sterile aments 1' long, densely clustered, lighi- 

 reddish. Cones 3 to 5' long. — Less valuable for turpentine or timber than P. 

 palustris, but equally excellent as fuel and light. 



j3. serotina. Pond Pixe. Cone ovoid, thick (as largo as a gooso egg), pol- 

 ished and shining, nearly unarmed. Tree smaller. 



4 P. rigida Miller. Pitch Pine. Lvs. in 3s, rigid, with short sheaths; cones 

 pyramidal-ovoid, clustered; scales with short, thick, reflexed spines. — Common in 

 barren, sandy plains, which it often exclusively occupies. It is of moderate height 

 at the north (25 to 30t), but attains a great height (40 to 7 Of) in the 8. States. 

 The trunk, which is seldom straight, is covered with a very thick and rough bark 

 cleft with deep furrows. Lvs. 4 to 6' long. Cones usually several together, 2 

 to 3' long. Tho wood is heavy with resin, is used in architecture for flooring, 

 and in ship-building, and is excellent as fuel for steam engines. 



5 P. mitis Mx. Yellow Pine. Spruce Pine. Lvs. in pairs (sometimes in 

 3s), slender, channeled, with elongated sheatlis, scattered all over the Iranchlets; 

 cones not generally clustered, oblong-ovoid, half the length of the shortish lvs. ; 

 scales with a short, weak, slightly incurved prickle. — Widely diffused throughout 

 the country. A treo of slow growth, 30 to 50 to SOf high. Bark rough, broken 

 into broad plates. Lvs. 3 to 5' long, bluish green, in 33 on young trees or the 

 moro vigorous shoots. Cones 18 to 30" long, rugged with the projecting point 

 of the scales. Timber close-grained, moderately resinous, used in immense quan- 

 tities for all kinds of architecture. 



(5. ? paupera. Bark smoother than tho pines in general, the branches resem- 

 bling those of tho beech ; lvs. short, (3 to 4') and thinly scattered ; cones 

 smaller than a hen'3 e^, with minute, straightish spines; barren aments 

 6" long.— Ga. Treo 40 to 50f high. (P. glaber Walt. ?) 



6 P. puagens Mx. Southern Mountain Pine. Lvs. in pairs, short, rigid, actrte, 

 somewhat channeled, rough-edged; sheaths very short; cones ovoid, longer than 

 the Itavis ; scales tipped with a long, recurved and hooked spine. — Lookout Mt. I 

 Tenn. and Table Mt., Grandfather Mt. 4c., N. Car. and Va. Tree with rough 



