Trees of Indiana 



I NT HOI) UCTION 



The prcsoiii, cilitioii luis been entirely iX'wi'itteii. While the general 

 plan (if the first edition has been followetl, some changes have been 

 made. 



The numl)er of ti'ees included has been wholly arbitrary. All woody 

 ])lants of the iState which generally attain a maximum diameter of 

 10 cm. (4 inclies) at lireast high are regarded as tree forms. Alrnis 

 rinjoKd whicli so closely resembles Alnvs incaua, is an exception, and a 

 desci'iplion of if is given to aid in the identification of our tree form of 

 Ahiiis. Also several species of C'ratiPgus ai'e included which commonly 

 do not attain tree size. ^Fhe species of all Cratiegiis Ijegin to flower 

 and fruit many years Itefore they attain their maximum size. The 

 genus is mucdi in need of study, and the smaller forms are included 

 to sliniuhite a study of the genus, and in oi'der that the larger forms 

 may be more easily and certainly identified. 



'I'lie number of introduced trees has been limited to those that more 

 or less freely escape at least in some pai'ts of the State. The one excep- 

 tion is Ciitalpa hiyiionioidcs, wliicdi is given to help separate it from 

 our native catalpa, both of which are now commonly planted. 



Itolanic- Dos<Ti|)lioii. — The botanic descriptions have been made 

 from specimens collected in Indiana. In most instances the material 

 has been ([uite ainjile, and collected from all parts of the State. Tech- 

 nical terms liave l)een avoided, and only when precision and accuracy 

 wer(> necessary have a few been used which can be found in any school 

 dictionary, ^i'he length of the description varies in proportion to the 

 im])()i'tance and interest of the species and the number of characters 

 necessary to separate it from other forms. The characters used are 

 those which are the most consjiicuous, and are generally with the 

 spcH'imen at hand. In most instances mature leaves are at hand, and 

 these are most fully described. When leaves are discussed, only mature 

 and noi'mal leaves are considered. The descriptions are not drawn to 

 include the leaf forms, and sizes of coppice shoots or seedlings. 

 Measurements of simple leaves do not include the jjetiole unless 

 mentioned. 



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