sepals not markedly spathulate; small plants with leaves 
up to 8 cm. long 
Spur nearly 4 mm. long; rhachis about equalling the pe- 
duncle, 6-17-flowered ; lateral sepals 4.5-5.5 mm. long; 
leaves broadly ligulate, 6-10 mm. broad 
7. dolabriformis 
Spur about 2 mm. long; rhachis shorter than the pedun- 
cle, 6-7-flowered; lateral sepals 3.5-4.5 mm. long; 
leaves linear, 2-6 mm. broad . ... . . 8. tridens 
Spur longer, often much longer, than the lip, usually not 
much swollen at the apex 
Petals broader than long (length measured from apex to 
base of central vein) 
Leaves small, elliptical-lanceolate or oblong, up to 5 
em. long and 12 mm. broad; inflorescences 4—6 cm. 
long; rhachis about as long as peduncle, about 5-7- 
flowered ; lateral lobes of lip slightly longer than the 
middle lobe; spur about twice as long as the lip, not 
atallswollen . ....... =... 41. ischnopus 
Leaves large, strap-shaped, 20-35 em. long, 2.5-3.25 
em. broad; inflorescences at least 10 cm. long, rha- 
chis much shorter than peduncle, 10—20-flowered ; 
lateral lobes of lip distinctly shorter than middle 
lobe; spur longer than the lip, swollen at the apex 
4. macrophylla 
Petals longer than broad 
Leaves broadly strap-shaped or elliptical-oblong, scarce- 
ly curved, 10-24 mm. broad; petals 3-nerved 
Leaves elliptical-oblong, 4-10 em. long, 10-24 mm, 
broad, with two slightly unequal rounded lobes at 
the apex; inflorescences up to 15 em. long, rhachis 
2-4.5 em. long, 7-13-flowered ; lip about 4.5 mm. 
long, lateral lobes much shorter and narrower than 
the middle lobe, spur 5-8 mm. long _ 5. elliptica 
Leaves broadly strap-shaped, 9-15 cm. long, 11-22 
mm. broad, unequally lobed at the apex; inflores- 
cences 12-22 cm. long, rhachis 4—9 cm. long, 10- 
25-flowered ; lip about 6.5 mm. long, lateral lobes 
nearly as broad and as long as the middle lobe, 
spur about 16 mm. long . . . . . . 6. trifurca 
Leaves narrowly strap-shaped, usually somewhat 
[ 245 ] 
