PINACEAE. The Pine Family. 
Trees with a resinous juice; leaves linear or seale-like, clus- 
tered, or borne alternately on branches, mostly evergreen: 
fruit a dry cone, or scmetimes a berry. A family with about 
250 speeies distributed throughout the world, but confined 
principally to temperate regions. They are of great economic 
importance as a source of resin, tar, turpentine and pitch as 
well as for lumber and ornamental planting. 
Leaves all needle-shaped. 
Leaves borne in clusters of two to five.......... 1 Pinus. 
Leaves scattered on the stem. 
NL MMA ACUAT GARG ap os ori, = acs o siel’'s 6 win sie oes «800s 2 Taxodium. 
LS ECT ED Ea ote 1 SR a i a a ae ae a a 3 Pseudotsuga. 
Leaves scale-like and appressed to the stem, or 
some of them awl-shaped, spreading. 
Fruit a small cone consisting of a few scales: 
Peete OI) 10 ODLONE . (20. aa. 5 c ais.¢ eke vide ee ee 4 Thuja. 
PIOUS eae rat keh Ste. Be «hy asse 5 Chamecyparis. 
Fruit fleshy, berry-like. 
Leaves awl-shaped, .spreading on mature 
Emme COMCR. AXMIATY.. 67 ckiec sce sce ee 6 Juniperus. 
Leaves’ scale-like, appressed on mature 
pranenes cones terminals: .. ose... 0. cs. 7 Sabinia. 
1 PENUS:; <The Pines. 
Monoecious, evergreen trees or rarely shrubs of great eco- 
nomic importance. The leaves are borne in clusters of two 
to five upon minute dwarf branches. The main stem pro- 
duces branches regularly in whorls which decrease in length 
towards its apex. thus giving the tree a conical appearance. 
Flowers borne in the spring; the fruit, a woody cone, not 
ripening until the season following. The seeds are borne in 
pairs at the base of the cone scales. 
Leaves in 5’s with a deciduous sheath at base, 
CONC SCAlGS MINATINEG 2.0520. . ons. eet bok 132 Pex tlis: 
Leaves in bundles of three. 
Cones subterminal, cylindrical or conical— 
oblong, slightly curved, armed with small 
DEE tts TTICUION on eis plc area ciea ou ede 2. P. palustris. 
Cones lateral, ovate-oblong, armed with short, 
MB EE ERT MO er ccn <2, es cheat in A he we. oily aie ante LAB: 
3—Trees. 
