BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
CampripGe, Massacuuserrs, JANUARY 15, 1935 Voi. 3, No. + 
STUDIES IN STELIS. III. 
BY 
OakrES AMES 
THREE NEW SPECIES of Stelis are described and il- 
lustrated in this paper. 'wo of these species belong to 
the section of the genus that is characterized by stigma- 
tiferous lateral lobes at the apex of the column. The third 
species, Stelis latipetala, belongs to that section in which 
the species have the stigmas confluent on the anterior 
surface of the column beneath the triangular rostellum. 
Stelis crystallina Ames sp. nov. 
Caules secundaril dense caespitosi, erecti vel adscen- 
dentes, monophylli, vaginis tubularibus vestiti. Folium 
anguste oblongum, utrinque attenuatum, apice tridentic- 
ulatum. Racemus gracilis, folium excedens, multiflorus. 
Bracteae racemi infundibuliformes, acutae. Sepala valde 
convexa, elliptica, obtusa, trinervia, intus dense glandu- 
losa, glandulis crystallinis obtecta. Petala suborbicularia, 
uninervia, apice vix incrassata, Labellum a latere visum 
semiglobosum, in circuitu orbiculare, valde incrassatum, 
apice denticulatum, basi callosum. Discus leviter furcato- 
‘arinatus, supra medium excavatus. Columna carnosa, 
petala aequans, antice utrinque lobo carnoso obtuso stig- 
matifero instructa, rostello late triangulo. 
Leat-bearing stems densely caespitose, up to 5 cm. 
long, unifoliate, clothed with several closely appressed 
tubular sheaths, the uppermost one 2.5 cm. long, 3 mm. 
[ 45 | 
