ally dilated in the middle forming a pair of upcurved 
semiorbicular lobules, then slightly contracted into an 
oblong-subquadrate sulcate anterior portion which is 
retuse at the apex; disc fleshy-thickened in the middle 
and near the apex. Column short, stout, prominently 
angled in front. 
Ayacucho: Aina, between Huanta and Rio Apurimac, at 750-1000 
meters altitude, epiphyte in open woods, May 7, 17, 1929, E.P. Kil- 
lip & A.C.Smith 22612—Junin: Chanchamayo Valley, at 1800 meters 
altitude, September 1929, Carlos Schunke 1844; same data, August 
1930, Schunke 1845. 
Maxillaria parvibulbosa C. Schweinfurth sp. nov. 
Herba terrestris, major. Pseudobulbi perparvi, saepis- 
sime aggregati, in sicco cylindracei, unifoliati. Folium 
conspicue petiolatum; lamina anguste oblonga vel ellip- 
tico-oblonga, acuta, basi cuneata; petiolus elongatus, 
gracilis, profunde sulcatus. Scapi laterales, basales, 
breves, tenues, uniflori, pedunculo vaginis laxis obtecto. 
Flos grandis. Sepalum dorsale lineari-lanceolatum, longe 
acuminatum, tubulari-involutum. Sepala lateralia an- 
guste et oblique triangulari-lanceolata, acuminata, cum 
columnae pede mentum conspicuum formantia. Petala 
sepalis lateralibus similia sed minora. Labellum segmen- 
tis ceteris multo brevius, parte inferiore erecta, prope 
apicem profunde trilobatum; lobi laterales angustissimi, 
apice libero brevi rotundato; lobus medius elliptico- 
lanceolatus, crassus, marginibus valde undulatis. Colum- 
na brevis, a latere visa crassa, in pedem longum extensa. 
Plant terrestrial, rather large. Roots fibrous, filiform, 
glabrous. Rhizome apparently short, creeping. Pseudo- 
bulbs commonly approximate, very small, obliquely cy- 
lindric or ellipsoid-cylindrie and finely striate-rugose 
when dry, somewhat compressed, unifoliate, about 2 ¢m. 
or less long, more or less concealed and much surpassed 
by several distichous sheaths which waste into fibres. 
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