conspicuous nerves and two or three outer less prominent 
ones. Petals deeply bilobed ; posterior lobe subquadrate, 
about 5 mm. long and 3-3.5 mm. wide, unequally 3- 
toothed at the slightly dilated apex, 2- to 3-nerved; 
anterior lobe smaller, at right angles to the posterior lobe, 
triangular-ovate, oblong-ovate or lanceolate, more or less 
oblique, about 3.1 mm. long, obtuse. Lip linear, fleshy, 
more or less recurved (occasionally geniculate), strongly 
longitudinally convex, 8-lobed at the base (rarely merely 
angled on each side at base); lateral lobes minute, den- 
tiform, reflexed, occasionally uncinate, about 1.2 mm. 
long; mid-lobe about 10-11.5 mm. long, rounded at the 
apex. Spur very slenderly cylindric, 2.7-8.1 cm. long. 
Anther canals long and slender. Stigmatic processes 
short, stout. 
Habenaria dentifera has several superficially close al- 
lies, among which are H. autumnalis Poepp. & Endl., 
H.avicula Schltr. var. peruviana C.Schweinf., H.odon- 
topetala Reichb.f., and HZ. pleiophylla Hoehne & Schitr. 
It differs from all these concepts, however, in the form 
and lobing of the petals. From H. pleiophylla it further 
differs in having broader leaves and relatively shorter 
floral bracts. 
Junin: East of Quimiri Bridge, near La Merced, at 800-1300 meters 
altitude, in dense forest, perianth segments light green, June 1-3, 
1929, E.P.Killip & A.C.Smith 23841. (Tyrer in Herb. Field Museum 
No. 622198; Dupricare typk in Herb. Ames No. 38278.)—Loreto: 
Mishuyacu, near Iquitos, at 100 meters altitude, in forest, flowers 
light green, April 1930, G. K/ug 1217 (plant immature).—San Martin: 
Zepelacio, near Moyobamba, at 1100 meters altitude, terrestrial, in 
mountain forest, flowers yellow-green, June 1934, G. Klug 3691. 
Habenaria ligulata C. Schweinfurth sp. nov. 
Herba terrestris, elata. Caulis robustus, foliosus. Folia 
oblongo-lanceolata vel elliptica, adscendentia. Racemus 
longus, dense multiflorus. Flores mediocres. Sepalum 
[ 47 ] 
