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Y BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
Camprince, Massacnusetrs, JANUARY 22, 1943 Voi. 11, No, 1 
NOTES ON AMERICAN ORCHIDS 
BY 
Oakes AMEs AND Donovan S. CorRELL 
THIs PAPER includes descriptions of several American 
orchid novelties and a number of miscellaneous orchid 
notes, among them some nomenclatorial changes which 
were found to be necessary. 
Spiranthes Romanzoffiana Chamisso var. porri- 
folia (Lindl.) Ames & Correll comb. nov. 
Spiranthes porrifolia Lindley Gen. & Sp. Orch. PI. 
(1840) 467. 
Gyrostachys porrifolia O. Kuntze Rev. Gen. Pl. 
(1891) 664. 
Orchiastrum porrifolium Greene Man. Bot. Reg. San 
Francisco Bay (1894) 306. 
Ibidium porrifolium Rydberg in Bull. Torr. Bot. Club 
32 (1905) 610. 
Specimens which conform to Lindley’s type of S. 
porrifolia are readily distinguishable from the average 
specimen of §, Romanzoffiana. Usually S. Romanzoffiana 
is comparatively slender, with an elongated lax inflores- 
cence, and is quite different in habit from the Unalaskan 
type. It differs also from the Irish form and from the 
more northern forms of North America which are charac- 
teristically stunted and usually possess a short compact 
inflorescence. 
bt] 
HARVARD 
UNIVERSITY 
LIBRARY 
JAN 26 1943 
