Lip free, clasping the column or broadly concave at the base. Column slender.--Species 7. Madagascar and neighbouring islands, West Africa. Some are used as ornamental plants or yield dye-stuffs. =Phaius= Lour. 73. (65.) Leafy stems with indeterminate apical growth; side-shoots weakly developed or wanting. Inflorescences or solitary flowers axillary. Epiphytes without pseudobulbs. Lip continuous with the base of the column. [Tribe SARCANTHEAE, subtribe AERIDINAE.] 74 Leafy stems with determinate apical growth; annual shoots arising laterally at their base and forming a sympodium. Mostly epiphytes with pseudobulbs. Lip 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 Réunion. =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 neighbouring 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 distinct or united by the gland only. 81 77. Stalk of the pollen-masses 2-cleft.--Species 10. Madagascar 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 _Rhaphidorhynchus_ Finet). =Angrecum= Thouars Stalk of the pollen-masses thread-like. 79 79. Lip hood-shaped, entire, covering the column. Sepals and petals connivent.--Species 1. West Africa (Cameroons). (Under _Angrecum_ Thou. or _Saccolabium_ Blume). =Calyptrochilus= Kraenzl. Lip not covering the column. 80 80. Lip directed upwards. Flowers fleshy, rather small.--Species 4. Madagascar and neighbouring islands, Equatorial East Africa. Used as ornamental plants. (Under _Saccolabium_ 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