. Trees of Texas; an illustrated manual of the native and introduced trees of the state . the beginning of an acquaint- 20 Bulletin of the University of Texas aneeship with it. It serves merely as our introduction. An inti-mate acquaintance depends on a knowledge of its distribution,family relationship, characteristics, soil and water requirements,products, economic or horticultural value—in short, all that maybe learned about it. The writer hopes that no one will be foundwho retains the hopeless attitude that to know more aboutplants causes a lessening of our appreciation of their beauty. HOW
. Trees of Texas; an illustrated manual of the native and introduced trees of the state . the beginning of an acquaint- 20 Bulletin of the University of Texas aneeship with it. It serves merely as our introduction. An inti-mate acquaintance depends on a knowledge of its distribution,family relationship, characteristics, soil and water requirements,products, economic or horticultural value—in short, all that maybe learned about it. The writer hopes that no one will be foundwho retains the hopeless attitude that to know more aboutplants causes a lessening of our appreciation of their beauty. HOW TO USE THE KEY The number of species which occurs in our tree flora is sogreat that descriptions alone would not enable the beginner todetermine the name of a tree without long and tedious effort,which in the end would frequently prove uncertain. Accord-ingly, the key has been arranged in such a way that if followedstep at a time the investigator may arrive at the proper de«scription with relative ease and Suppose, for example, I. Outlines and Bases of Simlpe Iieaves. I. 1. Linear. 2. Lanceolate (iance-shaped). 3. Oblong. 4. Oval. 6. Ovate (egg-shaped). 7. Oblanceolate. 8. Spatulate(spatula-like). 9. Obovate (leversed ovate). 10. Cuneate (wedge-siiaped). one wished to find the name of the American elm. The firstchoice to be made is between leaves needle, scale or awl-like;fruit a cone of dry scales or a berry-like cone, and leaves withexpanded blad(^s, fruit not as above. This choice is easilymade in favor of the latter. Under I, leaves compound, orII, leaves simple, the beginnei- will find it necessary to consultthe glossary and illustrations to determine just what is meant by 77k Trees of Texas 21 these terms, when his decision will Ix^ in favor of II. Ilicn hemust determine^ whether the leaves are opposite or alternate onthe stem. Here his decision jioes to B, leaves alternate. UnderB, the choice goes to 2, leaves with netted veins. then tob, leave
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