free apices of the lateral lobes. Column short, stout, sub- 
cylindric, about 4 mm. high at the back, extended into 
a short stout concave foot. 
This species is closely allied to Mawillaria tafallae 
(Reichb.f.) C. Schweinf., but differs in having larger 
flowers with sharper sepals and petals, and with a cune- 
ate, not subcordate, base to the lip. 
The specific epithet is in allusion to the shape of the 
lip. 
Cuzco: Prov. of Paucartambo, between Sta. Isabel and Asuncién, 
at 1800 meters altitude, January 4, 1946, C. Vargas 5532 (Tyrr in 
Herb. Ames No. 63310). 
Maxillaria Woytkowskii C. Schweinfurth sp. nov. 
Herba epiphytica, mediocris. Rhizoma abbreviatum 
ut videtur. Pseudobulbus breviter et crasse cylindricus 
vel oblongo-ovoideus, valde anceps, unifoliatus. Folium 
distincte petiolatum; lamina elliptico-oblonga, acuta, 
infra cuneata; petiolus gracilis. Inflorescentiae breves, 
vaginis laxis pluribus omnino obtectae. Flos pro genere 
mediocris. Sepalum dorsale oblongum, apice rotundatum 
sed mucronatum. Sepala lateralia lanceolato-oblonga, 
obtusa sed mucronata, leviter obliqua. Petala oblongo- 
lanceolata vel elliptico-lanceolata, supra et infra angus- 
tata, acuta. Labellum tubulari-involutum, expansum in 
circuitu anguste ellipticum, supra medium leviter trilo- 
batum cum lobo medio ovato-oblongo et multo incras- 
sato; discus medio unicallosus. 
Plant epiphytic, medium-sized. Rhizome apparently 
abbreviated. Roots fibrous, flexuous, glabrous, slender. 
Pseudobulb oblong-cylindric or oblong-ovoid, strongly 
ancipitous, unifoliate, about 2.5-8 em. long, finely ru- 
gose in the dried plant, surrounded below by two pairs 
of imbricating concave sheaths which are secarious and 
non-leaf-bearing, the upper one being much larger. Leaf 
distinctly petioled ; lamina elliptic-oblong, acute, cuneate 
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