completely concealed by leaf-sheaths. Leaf solitary at 
apex of pseudobulb, also several distichously arranged at 
base of pseudobulb, linear-ligulate, obtuse, coriaceous, 
articulate, 2.5-6.5 em. long, 5-10 mm. wide; sheaths 
thick, strongly conduplicate, with hyaline margins, 8-15 
mm. long. Inflorescence from axil of leafat base of pseu- 
dobulb, much shorter than the leaves, erect-ascending or 
spreading-pendent, several-flowered, up to 4 em. long; 
peduncle and rachis angular. Floral bracts triangular- 
ovate to triangular-lanceolate, acute, concave, scarious, 
3-5 mm. long. Flowers small, with stout sigmoid-arcuate 
3-winged pedicellate ovaries which are about 8 mm. long, 
with the wings of the ovary continuous into the sepals. 
Sepals free, elliptic to elliptic-lanceolate, acute, dorsally 
‘arinate, longitudinally concave, 6.5-7 mm. long, 2—-2.3 
mm. wide; dorsal sepal erect-arcuate to form a hood over 
the column; lateral sepals spreading, oblique. Petals el- 
liptic to oblong-elliptic, obtuse to subacute, slightly con- 
‘ave, somewhat directed forward, 5.5-6 mm. long, 2.2- 
2.8mm. wide. Lip spreading, elliptic, lightly retuse at the 
apex, with the slightly recurved margins minutely un- 
dulate, prominently 3-nerved with the nerves branched, 
about 6 mm. long and 8.5 mm. wide at the middle; disc 
provided at the extreme base with a deeply concave gla- 
brous callus with very fleshy margins which are open in 
front, with a subquadrate slightly suleate puberulent cal- 
lus in front of the concave base, the entire callus about 
38 mm. long and 1 mm. wide. Column fleshy, clavate, 
about 8mm. long, provided on each side about the mid- 
dle with a small obliquely triangular obtuse arm which 
projects forward. Capsule on a slender pedicel, obovoid- 
ellipsoid to broadly ellipsoid, beakless, triangular in cross- 
section with the three angles prominently winged, about 
1.5 cm. long. 
Superticially, 1. Johnstonii is most closely allied to L. 
[ 25 ] 
