Polystachya. | CXXXIII. ORCHIDEÆ (ROLFE). 
Front lobe of lip suborbi- 
cular . c 
+{Leaves A in. or more long, 
or proportionally nar- 
row, 
Pseudobulbs ovoid or nar- 
row (unknown in 
57). 
Callus of lip absent 
Callus of lip carinate. 
Inflorescence pube- 
. 54. 
. 5B: 
107 
P, lawrenceana, 
P, Holstii. 
THOUS = . 56. D Kirki. 
Inflorescence villous 57. P. villosa. 
Callus of lip semi- 
quadrate . . 58, P. dixantha, 
Pseudobulbs dorsally flat- 
tened . . 99. P. affinis. 
Scapes 1-flowered . 60. P. cespitifica. 
Flowers over 3 in, long. 
Lip nearly straight . : ` . 
Lip abruptly reflexed about the middle 
Crest of lip large, 4-6-lobed. 
Plant 3-6 in. high; flowers paniculate . 
Plant about 2 in. high; flowers solitary . 
Rhachis zigzag, 
. P. grandiflora, 
. P. reflexa. 
, P, Preussii. 
. P, alpina. 
Stems with a single oblong-linear leaf . 65. P. disticha. 
Stems with oblong-lanceolate leaves . . 66. P. caloglossa, 
Lip very long, narrow, and doubly curved . . 67, P. elastica. 
Pseudobulbs or stems slender, superposed. 
Flowers paniculate. _ 
Leaves oblong or oblong-lanceolate . 68. P. fusiformis. 
Leaves linear or lanceolate-linear . 
Flowers racemose. 
Claw of lip densely seiose . S 
Claw of lip smooth. 
Stems and leaves 21-4 in, long 
Stems and leaves 1—14 in. long 
Pseudobulbs ovoid, distantly arranged 
Slender creeping rhizome. 
Petals minutely tuberculate; front lobe of lip larger 
than the side lobes . 
Petals minutely setose; 
obsolete . 
on e 
front lobe of lip nearly 
. 69. P. superposita. 
. 70. P, spatella. 
=- 41: P. e 
. 72. F. ruwenzoriensis, 
. 73. P. bulbophylloides, 
74, P. micropetala. 
1. P. leonensis, Reichb. f. Otia Bot. Hamb. ii. 112. Pseudobulbs 
globose, depressed, 4 in. diam., closely arranged along the rhizome; 
roots densely white-velvety; apex about 3-6-leaved. Leaves lanceolate 
or oblong-lanceolate, acuminate, 3-8 in. long, 6-13 lin. broad. Scapes 
6-9 in. long, puberulous; racemes simple, lax, many-flowered. Bracts 
acuminate from a broad triangular base, #-1 lin. long. Pedicels 4—5 
lin. long. Flowers light-green, sometimes suffused with brownish- 
purple ; lip white, with some purple on the side lobes behind. Dorsal 
Sepal ovate, obtuse, 14-2 lin. long; lateral broadly triangular, ovate, 
obtuse. Petals oblong, obtuse, 2 lin. long. Lip 
trilobed, 3 lin. long; 
