‘ 
BULLETIN 
TORREY BOTANICAL CLUB. 
Vol. 21. Lancaster, Pa., July 20, 1894. No. 7. 
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The Comparative Anatomy of Corema alba and Corema Conradii.* 
\ 
By Marion C, MCEWEN. 
(PLATE 210.) 
The Order Empetracez includes but five species, all small ever- 
green plants with dicecious inconspicuous flowers and drupaceous 
fruit. They closely resemble one another and all have the gen- 
eral appearance of certain Ericacee. Of the genera now in- 
cluded in the Empetracez, Jussieu knew but one, and its resem- 
blance to the Ericaceze was so marked that he referred it to that 
order. Nuttall, on the contrary, in his description of the Empe- 
tracez, in 1818, considered them closely allied to the Coniferz, while 
Don believed them to hold an intermediate position between Eu- 
Phorbiacee and Celastracee. Dr. Gray, in the earlier editions of 
a his Manual, placed the order between Euphorbiaceae and Urtica- 
cee, while in the later editions it is put between Salicacea, with 
- which it has little or no morphological connection and Ceratophyl- | 
laceze, 
In his description of the order, Dr. Gray indicates the ques- 
tionable position of Empetracee by saying that it has the foli- 
age, aspect and compound pollen of heaths, the drupaceous © 
fruit of Arctostaphylos, but the divided or laciniate stigmas, etc,, of 
Certain Euphorbiacez, and that it is “ probably only an apetalous 
and polygamous or dicecious degenerate form of Ericacex.”’ 
et SS 
* Investigation conducted at the Botanical Laboratory of Barnard College. 
