1350 



PINUS 



r. yiiniber of Irs. !i : resi 

 d u c t s parenchymaiot 



Pseiidostrobi 



CO. ifumber of Ivs. S, occasion- 

 all ij 4-5: resin-ducts usu- 

 ally parenchymatous. 

 Toedce. 

 T>. Branchlets gl an cons: 

 color of Ivs. bluish or 

 grayish green. 

 E. Jyvs. slender, droopinij. 

 EE. Lvs. stout, 6-12 in. long: 

 seeds long-winged 1 



DD. Branchlets not glaucous: 

 color of lvs. dark yel- 

 lowish or bright green. 

 VI. Length of lvs. 5-12 in.. 



IC>. Torreyana 



3. Cones not prickly.. 'i\. divaricata 



3. Cones prickly 32. olausa 



33. oontorta 



J. 35. muricata 

 .i6. Laricio 

 37. Pinaster 



green, G-8 in. long: cones eylindric on 1-2 In long 

 stalks, G-IO in. long: seed brown, 4 lines long. Hinial. 

 Gn. 31, p. 195. A.G. 19: 149. -Handsome tree, of some- 

 what loose habit, with graceful pendu! 

 as far north as Mass. in sheltered po- 

 sitions. Var. zebrlna, Bailly, has the 

 lvs. with a whitish zone near the tip. 



2. Peilce, Griseb. (P. exc(lsa,\&T. 

 Peuce, Griseb.). Attains 50 ft., 

 with ascending short branches form- 

 ing a narrow dense pyramid: branch- 

 lets greenish, glabrous, not glaucous: 

 wiuter-liuds ovate: lvs. straight, blu • 

 ish green, 3-4 in. long: cones short- 

 stalked, eylindric, 3H-6 in. long, 

 with obovate scales: seed 4 lines 

 long. S. E. Eu.-An ornamentui 

 hardy Pine of dense, regular habit 

 and slow growth; forms a narrower 

 and denser pyramid than No. 3. 



3. StrdbuB, Linn. White Pine. 

 ■ Pigs. 1815, 1819, 1820. Attains lOli. 



occasionally 150 ft., with liorizontMl 

 bi-anohes in fegnlar wt,..i-N f-rii,ii - 



iiul liiirdy i'me of rapid grc 

 uug, picturesque in old age: 



break up the monotonous skv- 

 rtliern p;irks. There are 

 M-i..in,llv .■nltiviitpd. Viir. Alba, 



brevifdlia, Loud. 



, II<.rt.l. Dwarf, 



\:ir. fastigiita. 



prOStrAta, Arlj. Krw, ln^ar|■, ]irM,-nnilirnl loin:. .iilVose 

 and trailing on the f^rinn].!. \'ar. umbraculifera, Knif,'lit. 

 Dwarf, Hat-topped bush, with short lvs. K.H. I,W9, p. 

 38. There are also forms with variegated and with yel- 

 low foliage. 



4. monticola, Don. Moitntain White Pine. Tree, to 

 100 or occasionally 150 ft., with slender, spreadhig, 

 somewhat pendulous branches forming a narrow open 



G. Bt 



-hie 



glauc 



39. Pinea ~^= 



.40. 



41. Halepensis 



42. Massoniana 

 GO. Branch lets g I a n - 



cons 43. densiflora 



EE. Length of lvs. %-2}4 in. 44. sylvestris 

 45. montana 

 1. .Stroius, 



1. exc^lsa. Wall. {P. Aepali'nsis, Chnmhr.). Attains 

 150 ft., witli spreading and slightly ascending branches 

 forming a broad open pyramid : branchlets greenish, 

 glabrous, glaucous ; winter -buds eylindric -obovate, 

 acute: lvs. slender, flaccid, drooping, grayish or bluish 



1830. Pinus Strobus (X 34). 



pyramid: branchlets puberulous, yellowish or reddish 

 brown: winter -buds ovate, acute: lvs. stiff, bluish 

 green and glaucous, IJ^^ in. long, with few inconspic- 

 uous or no lines on the hack: cones short-peduncled, 

 eylindric, slender, slightly curved, 5-11 in. long, yellow- 



