conifers. SILVA OF NORTH AMERICA. 147 



PINUS DIVARICATA. 

 Gray Pine. Jack Pine. 



Leaves in clusters of 2, stout, falcate, divergent, dark gray-green, from j of an inch 

 to 1J inches in length. Cones oblong-conical, oblique, usually erect, incurved, from 1-J 

 to 2 inches long, their scales furnished with minute incurved often deciduous prickles. 



Pinus divaricata, Du Mont de Courset, Bot. Cult. iii. Conif. 81. — Henkel & Hochstetter, Syn. Nadelh. 44. — 



760 (1802). — Sud worth, Bull. Torrey Bot. Club, xx. (Nelson) Senilis, Pinacece, 104. — Hoopes, Evergreens, 



44 ; Rep. U. S. Dept. Agric. 1892, 329. 78. — Sendclauze, Conif. 132. — Engelmann, Trans. St. 



Pinus sylvestris, 8 divaricata, Aiton, Hort. Kew. iii. 366 Louis Acad. iv. 184.— Veitch, Man. Conif. 158. — Regel, 



(1789). Buss. Dendr. pt. i. ed. 2, 46. — Schtibeler, Virid. Norveg. 



Pinus Banksiana, Lambert, Pinus, i. 7, t. 3 (1803). — Per- i. 392. — Willkomm, Forst. Fl. 242. — Sargent, Forest 



soon, Syn. ii. 578. — Desfontaines, Hist. Arb. ii. 611. — Trees N. Am. 10th Census U. S. ix. 201. — Watson & 



Nouveau Duhamel, v. 234, t. 67, f . 3. — Aiton, Hort. Coulter, Gray's Man. ed. 6, 491. — Mayr, Wald. Nordam. 



Kew. ed. 2, v. 315. — Pursh, Fl. Am. Sept. ii. 642.— 214, t. 8, f . — Beissner, Handb. Nadelh. 218. — Masters, 



Nuttall, Gen. ii. 223. — Sprengel, Syst. iii. 886. — Lawson Jour. R. Hort. Soc. xiv. 226. — Hansen, Jour. R. Hort. 



& Son, Agric. Man. 345; List No. 10, Abietinece, 35. — Soc. xiv. 350 {Pinetum Danicum). — Koehne, Deutsche 



Forbes, Pinetum Woburn. 13, t. 3. — Hooker, Fl. Bor.- Dendr. 36. 



Am. ii. 161. — Antoine, Conif. 8, t. 4, f. 2. — Link, Lin- Pinus Hudsonia, Poiret, Lamarck Diet. v. 339 (1804). 



ncea, xv. 491. — Spach, Hist. Veg. xi. 379. — Endlicher, Pinus rupestris, Michaux f . Hist. Arb. Am. i. 49, t. 2 



Syn. Conif. 111. — Knight, Syn. Conif. 26. — Lindley & (1810). — Provancher, Fl. Canadienne, ii. 555. 



Gordon, Jour. Hort. Soc. Lond. v. 218 (excl. syn. Pinus Pinus Hudsonica, Parlatore, De Candolle Prodr. xvi. pt. ii. 



contorta). — Dietrich, Syn. v. 400. — Carriere, Traite 380 (1868). — K. Koch, Dendr. ii. pt. ii. 298. — Lauche, 



Conif. 381. — Gordon, Pinetum, 163. — Courtin, Fam. Deutsche Dendr. ed. 2, 108 (1883). 



A tree, frequently seventy feet in height, with a straight trunk sometimes free of branches for 

 twenty or thirty feet, and rarely exceeding two feet in diameter, 1 and long spreading flexible branches 

 forming an open symmetrical head ; often not more than twenty or thirty feet tall, with a stem ten or 

 twelve inches in diameter, generally fruiting when only a few years old, and sometimes shrubby, with 

 stems not more than two or three feet high. The bark of the trunk is thin, dark brown slightly tinged 

 with red, and very irregularly divided into narrow rounded connected ridges separating on the surface 

 into small thick closely appressed scales. The winter branch-buds are ovate and usually abruptly 

 narrowed at the full and rounded apex, the terminal bud being about a quarter of an inch long and 

 an eighth of an inch thick and nearly twice as long as the lateral buds ; they are covered by ovate 

 lanceolate pale chestnut-brown scales with spreading tips; soon becoming reflexed on the lengthening 

 shoots, from which they fall before midsummer, leaving their dark thickened bases to roughen the 

 branches for ten or twelve years. The branchlets are slender, tough and flexible, and pale yellow- 

 green and glabrous in their first season, turning dark purple tinged with red during their first winter 

 and becoming dark purple-brown the following year. The leaves are borne in rather remote clusters 

 of two, with loose sheaths which at first are scarious, pale chestnut-brown below, silvery white above, 

 and nearly an eighth of an inch long, and in their second year are black and often not more than 

 one twenty-fourth of an inch in length; the leaves are finely serrulate, abruptly narrowed at the 

 apex, which terminates in a short callous point, somewhat falcate, rounded on the back, nearly flat or 

 slightly concave on the inner face, spreading from the base, at first light yellow-green but dark green 

 at the end of their first season, usually about an inch but varying from three quarters of an inch to an 

 inch and a quarter in length, from one twentieth to <5ne sixteenth of an inch wide, and persistent 



1 Britton, Bull. Torrey Bot. Club, x. 82. — Merriam, Gard. Chron. n. ser. xx. 503. 



