Glands of the rostellum enclosed by the processes of the anther or naked, rarely covered by a thin pellicle proceeding from the rostellum and carried away with the glands upon removal. [Subtribe GYMNADENIINAE.] 27 22. Glands enclosed in 2 separate pouches. Lip not spurred, usually convex, gibbous and hairy.--Species 10. North Africa. The tubers yield medicaments (salep) and mucilage. =Ophrys= L. Glands enclosed in a common pouch. 23 23. Glands 2, free. Lip spurred.--Species 20. North Africa. The tubers yield medicaments (salep) and mucilage. =Orchis= L. Glands united into one. 24 24. Connective distinctly elongated. Rostellum laterally compressed. Lip not spurred; middle-lobe entire.--Species 4. North-west Africa. They yield medicaments and mucilage. =Serapias= L. Connective not or scarcely elongated. Rostellum conical at the apex. Lip spurred, rarely without a spur, but then with a 2-cleft middle-lobe. 25 25. Lip with a long spur and two protuberances at the base, equally 3-lobed, flat in the bud.--Species 1. North-west Africa (Algeria). It yields medicaments and mucilage. (Under _Orchis_ L.) =Anacamptis= Rich. Lip with a short spur or without a spur, with unequal lobes, bent inwards or rolled up in the bud. 26 26. Middle-lobe of the lip very long, strap-shaped, spirally coiled in the bud.--Species 1. North-west Africa (Algeria). (Under _Aceras_ R. Br. or _Orchis_ L.) =Himantoglossum= Spreng. Middle-lobe of the lip moderately long, 2-cleft, bent over the anther in the bud.--Species 2. North Africa. (Including _Barlia_ Parl.) =Aceras= R. Br. 27. (21.) Glands of the rostellum transversely connate. Rostellum narrow. Stigmatic surface small. Basal appendages of the pollen-masses short. Column short. Lip with a short spur.--Species 40. Tropical and South Africa. (Including _Bucculina_ Lindl., _Deroemeria_ Reichb. fil., _Monotris_ Lindl., _Saccidium_ Lindl., _Scopularia_ Lindl., and _Tryphia_ Lindl.) =Holothrix= L. C. Rich. Glands of the rostellum free. 28 28. Glands large, surrounded by a thin membrane, which proceeds from the rostellum and is removed together with the glands. Lip with a very short spur. Flowers very small.--Species 1. Island of Réunion. =Herminium= L. Glands naked, rarely enclosed by processes of the anther, but then small. 29 29. Petals clawed; blade deeply concave, fringed. Lip fringed, not spurred.--Species 4. South Africa. (Including _Hallackia_ Harv.) =Huttonaea= Harv. Petals not clawed, flat or slightly concave. 30 30. Rostellum forming a narrow fold between the anther-cells. 31 Rostellum broad, triangular, placed below the anther-cells. 33 31. Column short. Stigmatic surfaces convex. Lip shortly or not spurred. Flowers yellow or white.--Species 5. South Africa and southern East Africa. (_Schizochilus_ Sond.) =Gymnadenia= R. Br. Column long. Stigmatic surfaces concave. 32