19 



Leaves 5-n(^rved at th(! bas(^ fruit a head of 

 earpels or achenes. 

 Bark fissured, not peeling off in flal<es, leaves 



aromatie ALTiNfjiAcio.E 166 



Bark peelinj; off in flakes, leaves not aromatic. Platanack.e 168 



Pistillate and staminat(^ flowers in one. 



Fruit cLry Tiliace.k 255 



Fruit fleshy Malacb.e 171 



PINACEAE. The Pine Family. 



Trees and shrubs with a resinous sap, which yields rosin, tar, tur- 

 pentine and essential oils. The leaves are linear or scale-like, alternate, 

 whorled or clustered; flowers naked, appearing in the spring; fruit a 

 cone or sometimes berry-like. A large family of trees and shrubs, con- 

 taining over 200 species, fouiul in many parts of the world, and of great 

 economic importance. In Indiana only nine species are native, and the 

 disti-ibution of seven of these species has always been very limited. 



Leaves linear, in clusters of 2, '.i, 5 or more than 5. 



Leaves in bundles of 2-5 1 Pinus. 



Leaves in bundles of more than 5 2 Larix. 



Leaves linear and solitary, or scale-like. 

 Leaves all linear. 



Leaves obtuse S Tsuga. 



Leaves shar])-pointed. 



Leaves green on both sides, alternate 4 Taxodium. 



Leaves glaucous beneath, opposite or whork^d 6 Juniperu..,. 



Leaves all scale-like, or some of the branches with linciar 

 sharp-pointed leaves. 

 Leaves all scale-like, fruit a cone of 8-12 imbricated scales. 5 Thuja. 

 Loaves scale-like or some linear and sharp-pointed, fruit 



berry-like 6 .Juniperus. 



I. PINUS. The Pines. 



Evergreen trees with needle-shaped leaves in bundles of 2-5 or 7; 

 flowers appealing in the spring, the staminate clustered at the base of 

 the season's shoots, the pistillate on the side or near the end of the 

 shoots; fruit a woody cone which matures at the end of the second 

 season, or more rarely at the end of the thii'd season; scales of the cone 

 variously thickened; seeds in paii's at the l>asc of the scales. 



There are about 70 species of pines of which three are native to 

 Indiana. Commercially the pines are classed as soft and hard. In our 

 area the soft pines ;ire repi-esented by the white i^ine, while the gray 

 and Jersey ])incs are classed as hard pines. 



