15O 44- ORCHIDACEAE 



55. (37.) Inflorescence terminal. Leaves folded lengthwise before expansion. 56 

 Inflorescence lateral 65 



56. Pollen-masses 8, without an appendage. Lip saccate at the base. Leaves 



jointed at the upper end of the sheath. Inflorescence head-like.' — 

 Species i. Madagascar and Seychelles. [Tribe GLOMEREAE.] 



Agrostophyllum Blume 

 Pollen-masses 2 — 4 57 



57. Column extended below into a foot forming with the base of the perianth 



a chin or spur. Pollen-masses attached to a short, sometimes scarcely- 

 perceptible stalk arising from the rostellum. Mostly epiphytic plants. 



[Tribe POLYSTACHYEAE.] 5» 



Column not extended into a foot. Pollen-masses without appendages. 

 Sepals and petals usually bent backwards. [Tribe LIPARIDEAE.] 61 



58. Lip spurred, 3-lobed. Pollen-masses 2, grooved. Leaves not jointed, 



linear. Joints of the stem swollen. — Species 6. South Africa. (Under 



Eidophia R. Br.) Acrolophia Pfitz. 



Lip not spurred. Leaves usually jointed 59 



59. Lip undivided. Chin weakly developed. Column short and thick. Stem 



slender. — Species i. German East Africa. . . Neobenthamia Rolfe 

 Lip 3-lobed 60 



60. Lateral sepals forming with the column a weakly developed chin. 



Side-lobes of the lip embracing the column. Column slender. Stem 

 shghtly thickened. — Species 6. Tropical and South-east Africa. Some 



are used as ornamental plants Ansellia Lindl. 



Lateral sepals forming with the column a strongly developed chin. Side- 

 lobes of the lip small. Column short and broad. Stem usually thickened 

 into pseudo bulbs. — Speciesi20. Tropical and South Africa. Some are used 

 as ornamental plants. (Including Epiphora Lindl.) Polystachya Lindl. 



61. Anther erect. Leaves not jointed 62 



Anther inclined to horizontal 63 



62. Anther adnate to the rostellum ; cells widely diverging, opening laterally. 



Column long. — Species i. West Africa Orestia Ridl. 



Anther deciduous, opening inwards. Column short. Lip uppermost. — 

 Species 4. West Africa and Comoro Islands. . Microstylis Nutt. 



63. Leaves not jointed. Lip more or less distinctly clawed. Column slender. — 



Species 30. Tropical and South Africa. . . . Liparis L. C. Rich. 

 Leaves jointed between sheath and blade. Lip not distinctly clawed. 64 



64. Stem with pseudobulbs. Leaf-blade horizontally flattened. — Species i. 



Mascarene Islands. {Cestichis Thouars, under Liparis Rich.) 



Stichorchis Thouars 



Stem witJKAit pseudobulbs. Leaf-blade placed vertically, fleshy. Lip 



uppermost, concave at the base. — Species i. Tropics. Oberonia Lindl. 



65. (55.) Leaves with convolute praefoliation (i.e. lolled lengthwise in the bud, 



one edge overlapping the other). Stem not swollen, or several joints 

 of the stem equally thickened. Mostly terrestrial herbs. ... 66 



