BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
VoL. 8, No. 4 
CamBripGe, Massacnusetts, Marcu 19, 1940 
A CONTRIBUTION TO OUR KNOWLEDGE 
OF THE ORCHIDS OF THE 
SOUTHEASTERN UNITED STATES 
BY 
Donovan S. Corre. 
THIs paper presents a summary of the results of sev- 
eral years research on the Orchidaceae of the southeastern 
United States. In 1897, Chapman’s Flora of the South- 
ern United States (ed. 8, pp. 477-491) contained sixty-six 
species and varieties of orchids. Since that time, however, 
our knowledge of the southern flora has been greatly in- 
creased. Consequently, in 1938, Small (Manual of the 
Southeastern Flora, pp. 363-399), with a rather liberal 
treatment of the Orchidaceae, included one hundred and 
fifteen species for this region. In the present conservative 
treatment of this family, forty-three genera and one hun- 
dred and ten species and varieties of orchids are recog- 
nized in the southeastern states which include North 
Carolina, Tennessee, Mississippi, Louisiana and those 
states south of the North Carolina-ennessee boundary. 
The Table records the species which have been found 
in each of the southeastern states and is based upon 
a critical examination of specimens found in forty-nine 
herbaria in the southern, eastern and central United 
States. The herbarium material examined was supple- 
mented by five extensive collecting trips which I made 
in this region. The occurrence and degree of abundance 
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