shaft of the column; stigmatiferous lobes porrect, de- 
flexed, much reduced; rostellum linguiform, obtuse, 
longer than or equalling the stigmatiferous lobes, Pollinia 
two. 
Stelis Storhit is closely allied to S. tenaissoma Schltr. , 
but differs from that species in habit and in the structure 
of the column. The sepaline nerves are variable in num- 
ber. Usually there are three nerves in the dorsal sepal 
while only two occur in the lateral sepals. The callus is 
conspicuously raised above the floor of the dise and some- 
what pandurate in outline; at the distal end it is bilobed 
or suleate where it slopes obliquely toward the apex of 
the labellum. 
Costa Rica, Santa Maria. May 15, 1928. H.E.Stork 21035 (Tyee 
in Herb. Ames No. 40701): San Cristobal Road. At 8,000 feet alti- 
tude. Flowers yellowish green. May 27, 1928. H.E.Stork 2226, 
[59 ] 
