I5<S 44. ORCHIDACEAE 



Leafy stems witli determinate apical growth ; annual shoots arising later- 

 ally at their base and forming a sympodium. Mostly epiphytes with 

 pseudobulbs. Up more or less distinctly articulated with the foot of the 

 column 86 



74. Lip not spurred. Sepals and petals long and narrow, spreading. Pollen- 



masses without an appendage. Leaves broad. — Species 2. Island of 



Reunion Bonniera Cord. 



Lip spurred 75 



75. Lateral sepals inserted on the foot of the column, forming a chin. Lip 



entire, smooth, shortly spurred. — Species 10. Madagascar and neigh- 

 bouring islands, Cameroons. Some are used as ornamental plants. 



Aeranthus Lindl. 



Lateral sepals inserted on the apex of the ovary. Column not prolonged 



into a foot 76 



76. Pollen-masses upon a single, sometimes 2-cleft or almost imperceptible 



stalk 77 



Pollen-masses with 2 stalks, which are entirely chstinct or united by the 

 gland only 81 



77. Stalk of the pollen-masses 2-cleft. ■ — Species 10. Äladagascar and the 



neighbouring islands, West Africa. (Including Ancistrorhynchus Finet, 

 Dicranotaenia Finet, and Monixus Finet, under Angrecum Thouars). 



Aerangis Reichb. fil. 

 Stalk of the pollen-masses simple 78 



78. Stalk of the pollen-masses broadened above or throughout, sometimes 



almost imperceptible. Lip with a long and thin spur. — Species 120. 

 Tropical and South Africa. Some are used as ornamental or medicinal 

 plants. (Including Lepervenchea Cord., Radinocion Ridl., and Rhaphi- 



dorhynchus Finet) Angrecum Thouars 



Stalk of the pollen-masses thread-like 79 



79. Lip hood-shaped, entire, covering the column. Sepals and petals conni- 



vent. — Species i. West Africa (Cameroons). (Under Angrecum Thou. 



or Saccolahium Blume) Calyptrochilus Kraenzl. 



Lip not covering the column 80 



80. Lip directed upwards. Flowers fleshy, rather small. — Species 4. Mada- 



gascar and neighbouring islands. Equatorial East Africa. Used as 



ornamental plants. (Under Saccolahium Blume). Acampe Lindl. 



Lip directed downwards. — Species 3. Madagascar and neighbouring 



islands, West Africa. Used as ornamental plants. Saccolabium Blume 



81. Pollen-masses affixed to the surface of two oblong scales. Lip entire, 



with a long spur. — Species 20. Madagascar and neighbouring islands, 

 West Africa. Some are used as ornamental plants. (Under Angrecum 



Thou.) Macroplectrum Pfitz. 



Pollen-masses affixed to thin, not scale-like, but sometimes very short 

 stalks 82 



