evanescent below and persistent imbricating and _ leaf- 
bearing above. Leaves horizontally spreading, distichous, 
linear, fleshy, obtuse and minutely apiculate with a dor- 
sal denticulate mucro, clasping at base, commonly up to 
17 mm. long and 2 mm. wide, rarely as much as 28 mm. 
long and 3.7 mm. wide (these measurements obtained 
by soaking the blade in hot water), with the mid-nerve 
‘arinate beneath especially toward the apex. Inflores- 
cence terminal, abbreviated, apparently sessile, common- 
ly 2-flowered with each flower in the axil of a conspicuous 
conduplicate carinate bract. Flowers small but large for 
the plant, with spreading segments. Dorsal sepal nar- 
rowly lanceolate or oblong-lanceolate, about 9.5 mm. 
long and 2.2 mm. wide, acute or acuminate, 3-nerved, 
dorsally indistinctly carinate. Lateral sepals obliquely 
linear-lanceolate, up to 11 mm. long and 2.2 mm. wide, 
acuminate, 8-nerved, dorsally prominently carinate. Pet- 
als obliquely linear, up to 9.1 mm. long and 1 mm. wide 
in the middle, acute, 3-nerved. Lip adnate to the column 
nearly to its apex; lamina deeply 3-lobed near the shal- 
lowly cordate base, up to 7.9 mm. long in the middle: 
lateral lobes alitorm, semiovate, narrowed to an obtuse 
apex, about 3.4 mm. long and 1.6 mm. wide below, sub- 
erect in natural position; mid-lobe much larger, porrect, 
lanceolate or linear-lanceolate, up to 6.4 mm. long and 
2.1 mm. wide, acuminate to an obtuse apex, 5-nerved 
at base; disc with a pair of dentiform calli at the base. 
Column short, stout, dilated upward, up to 4 mm. long 
at the back, denticulate at the apex, on each side with 
an obliquely triangular porrect tooth. 
Hpidendrum nanum appears to lack close allies. In 
habit it resembles 47. Porpav Reichb.t. 
The collection, Schunke 552, consists of a single plant 
with simple stem and rather larger leaves and flowers 
than in the type collection. 
[ 103 ] 
