cm. long. Petals linear-lanceolate, oblique, broadly ob- 
tuse and minutely apiculate, lightly constricted on each 
side near the thickened apex, 1.2—-1.5 em. long, about 8 
mm. wide below the middle. Lip erect, parallel to the 
column, recurved and about equaling the lateral sepals 
in natural position, conspicuously 3-lobed above the mid- 
dle, about 1 em. wide when expanded, adnate to the 
column-foot near its apex; lateral lobes erect in natural 
position, semiobovate with a minute broadly rounded 
free portion which is irregularly dentate; mid-lobe sub- 
quadrate, lightly retuse at the subtruncate apex, flat, 7-8 
mm. long, about 6 mm. wide; dise traversed through 
the lower half by an oblong-linear tricarinate callus. Col- 
umn lightly arcuate, abruptly clavate above when viewed 
from the side, about 1 cm. long at the back, extended 
into a foot which is subequal to the column. 
This species is apparently allied to Mawzillaria brevi- 
scapa Poepp. & Endl., but has dissimilar petals and lip. 
It has much smaller flowers than MZ. Koehleri Schitr., 
with different petals and lip. It diverges from M. Bau- 
manniana Schltr. in having smaller flowers, different 
petals, a long mentum and a dissimilar mid-lobe of the 
lip. 
The specific name is in allusion to the spur-like men- 
tum. 
Junin: Chanchamayo Valley, ‘‘1924-1927,’’ Carlos Schunke s.n. 
(Type in Herb. Field Mus. No. 571636); same locality, at 1800 me- 
ters altitude, October ‘‘1924-1927,’’ Schunke s.n.; same locality, at 
1800 meters altitude, October 1923, Schunke 558. (This collection 
differs from the usual form in having longer scapes and larger flowers 
which are very imperfect); Schunke Hacienda, above San Ramon, at 
1300-1700 meters altitude, in dense forest, September 1925, Schunke 
ATO. 
Maxillaria crassicaulis C. Schweinfurth nom. nov. 
Ornithidium Weberbauerianum Krinzlin in Fedde Re- 
pert. 1 (1905) 91, non Maaillaria Weberbauerit Schitr. 
1921. 
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