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Empa'orium purpureum L. July 31, 1896. Round Lake. 
Solidago, one species. August 6, 1896. Cedar Lake. 
Euthamia graminifolia (L.). Nutt. August 1, 1896. Cedar Lake. 
Aster macrophyllus L. August 6, 1896. Round Lake. 
Inula Helenuum L. August 6, 1896. Round Lake. 
Silphium trifoliatum L. July 31, 1896. Round Lake. 
Rudbeckia laciniata L. September 2, 1897. Cedar Lake. 
Bidens Becki: Torr. August 6, 1896. Round Lake. 
Bidens trichosperma (Michx.). Britt. August 6, 1896. Round Lake. 
Erechtites hieracifolia (L.). Raf. September 2, 1897. Cedar Lake. 
Cardwus muticus (Michx.). Pers. September 2, 1897. Cedar Lake. 
SomE UNRECOGNIZED Forms or NatTIvE TREES. 
By STANLEY COULTER. 
In the case of certain of our familiar forests there is a popular or com- 
mercial recognition of certain well-marked forms which have either es- 
caped the attention of botanists or have been considered of such slight im- 
portance as to receive no mention in descriptive works. Some of these 
forms are so distinct and so persistent as to raise the question as to 
whether they may not be entitled to varietal rank. Certainly in a study 
of our forest flora they must be taken into account. I desire in this paper 
to call atention to some of these botanically unrecognized forms, hoping 
by this means to receive added information upon this point. 
ASIMINA TRILOBA DUNAL. 
The papaw has two easily distinguishable forms, which may be char- 
acterized as— 
1. A large-fruited form, becoming a rich yellow upon ripening. 
2. A small-fruited form, remaining white upon ripening. 
Among the evident fruit differences the following are to be noted. In 
the large-fruited form the pulp is much softer and more yielding than in 
the small-fruited form; it possesses a much stronger flavor and odor; the 
