ing of the lip is often yellow. They are strongly fragrant 
with the scent of coumarin, in contrast to the flowers of 
var. cernua, which, in the geographical zone of contact 
in the midwest, at least, are generally scentless, or, when 
aromatic, exhibit usually but a faint fragrance strikingly 
like the scent of fresh Cypripedium roots. In well de- 
veloped specimens of the two taxa, the inflorescences are 
strikingly different due to differences in the orientation 
and shape of the flowers. ‘The nodding of var. cernua is 
accentuated by a general curvature of the dorsal sepal, 
whereas in S. magnicamporum this segment is arcuate 
only near the base. ‘The orientation of the lip also varies: 
in S. magnicamporum it is rather uniformly arcuate along 
its length, although the apex is often abruptly reflexed, 
whereas in var. cernua the lip is often rather geniculate 
at about the middle. These differences in flower shape 
and orientation lend different aspects to their respective 
inflorescences. In var. cernua, the general impression is 
of an ornate inflorescence, an impression often accentu- 
ated by the retlexed tips of the sepals and petals. In iS. 
magnicamporum, the more linearly organized flowers pro- 
duce a strikingly scalariform inflorescence. The popula- 
tions of typical S. magnicamporum which I have studied 
produce monoembryonic seeds, although polyembryony 
appears to be frequent in some areas. ‘The seeds of this 
species tend to be short and broad, generally oblong- 
quadrate and truncate but occasionally vary toward the 
more fusiform seeds of var. cernua. The living plants 
of typical S. magnicamporum available for study were 
not apogamous, whereas | have found that var. cernua 
characteristically sets seed without pollination. 
These taxa vary vegetatively as well. A salient feature 
of S. magnicamporum is the absence of leaves at anthesis. 
these senesce two to several weeks before the inflores- 
cence appears. In var. cernua, however, they persist dur- 
[ 290 | 
