341 
Diplomeris, Don. 
Diplochilus, Lindl. 
Paragnathis, Spr, 
Cynorchis, Thouars. 
Tryphia, Lindl. 
Arnottia, A. Rich. 
? Amphorchis, Thou. 
Bartholina, R. Br. 
Bicornella, Lindl. 
Satyrium, Swz. 
Diplecthrum, Rich. 
Repandra, Lindl. 
Disa, L. 
Monadenia, Lindl. (67) 
Penthea, Lindl. (68) 
Serapias, L. 
Helleborine, Pers. 
Pterygodium, Swz. 
Corycium, Swz. 
Ophrys, L. 
Disperis, Swz. 
Dryopeia, Thouars. 
*§ 5. Gastrodie.®, 
Lindl. 
Gastrodia, R. Br. 
Epiphanes, Bl. 
Epipogium, R. Br. 
? Hysteria, Rnwdt. 
§ 6. Arethuse®, 
Lindl. 
Caleana, R. Br. 
Calcearia, Bl. 
Corysanthes, R. Br. 
Corybas, Salisb. 
Pterostylis, R. Br. 
Crybe, (6y) 
Arethusa, Swz. 
Odonectis, Raf. 
Pogonia, Juss. 
Nervilia, Gaud. 
•Triphora, Nutt. 
Cleistes, Rich. 
Calopogon, R. Br. 
Cathea, Salisb. 
Glossodia, R. Br. 
Thelychiton, Endl. 
* * 
Anthogonium, Wall. 
Limodorum, Haller. 
Chloraea, Lindl. 
Gavilea, Popp. 
Asarca, Lindl. 
Bipinnula, Juss. 
? Chlorosa, Bl. 
Lyperanthus, R. Br. 
Epipactis, Hall. 
Serapias, Pers. 
Cephalanthera, Rich. 
* * 
Caladenia, R. Br. 
* Leptoceras, R. Br. 
Eriochilus, R. Br. 
Chiloglottis, R. Br. 
Cyrtostylis, R. Br. 
Microtis, R. Br. 
§ 7. Neottie®, Lind. 
Spiranthes, Rich. 
Gyrostachys, Pers. 
Ibidium, Salisb. 
Cyclopogon, Presl. 
Sarcoglottis, Presl. 
Stenorhynchus, Rich, 
Aristotelia, Lour. 
Adenostylis, Bl. 
Ulantha, Hooker. 
Plexaure, Endl. 
Neottia, Rich, 
Listera, R. Br. 
Epipactis, Pers. 
Peiexia, Poit. 
Sauroglossum, Lindl. 
Stenoptera, Presl. 
Eucosia, Bl. 
Georchis, Lindl. 
Etseria, Bl. 
Goodyera, R.Br. 
Tussaca, Raf. 
Peramium, Salisb. 
Hsemaria, Lindl. 
Gonogona, Link. 
Hylophila, Lindl. 
Physurus, Rich. 
Microchilus, Presl. 
Erythrodes, Bl. 
Galera, Bl. 
Herpysma, Lindl. 
Anecochilus, Bl. 
Chrysobaphus, Wall. 
Myoda, Lindl. 
Cheirostylus, Bl. 
* # 
Ponthieva, R. Br. 
Tripleura, Lindl. 
Cranichis, Swz. 
? Galeola, Lour. 
Prescottia, Lindl. 
Altensteinia, Kth. 
Decaisnia, Ad. Bfong. 
Zeuxina, Lindl. 
* * 
? Cordyla, Bl. 
Cryptostylis, R. Br. 
Zosterostylis, Bl. 
Calochilus, R. Br. 
Prasophyllum, R. Br. 
Genoplesium, R. Br. 
Orthoceras, R. Br. 
Diuris, R. Br. 
Epiblema, R. Br. 
Thelymitra, Forst. 
* * 
Synassa, Lindl. 
Tropidia, Lindl. 
Cnemidia, Lindl. 
Decaisnia, Lindl. ol. 
§ 8. Cypripedie®, 
Lindl. 
Cypripedium, Linn. 
Order CCXLIV. VANILLXCE^. 
Vanileace®, Key to Structural Physiological and Systematic Botany, p. 73. (1835). 
Essential Character.— Pmanf/i articulated with the ovary, sometimes with an 
external caly cine cup. Sepals 3. Petals 3, of yfhich 1 is unlike the others and forms a 
lip. Stamen 1, consolidated with the style into a column ; anther terminal, opercular ; 
pollen granular. Ovary 1 -celled, with 3 parietal placentae. Fruit succulent, indehiscent, 
1 -celled. Seeds either with a smooth testa tightly adhering to them, or with a thin mem- 
branous wing surrounding a firm nucleus. — Herbaceous plants, with broad leaves sessile and 
often strongly veined; stem mostly climbing, in Epistephium erect (?) . Flowers large and 
succulent. 
Affinities. I separate Vanilla and Epistephium from Orchidaceae be- 
cause of their succulent valveless fruit, of their seeds not having the loose testa 
which exists in all true Orchidaceae, and of their peculiar habit ; to which may- 
be added their aromatic properties. The winged seeds of Vanilla ? pteros- 
perma form no exception to the character of the order, for their nucleus is as 
tightly coated by the testa as in common Vanilla. 
Geography. Found on trees or in the fissures of rocks in the hottest 
parts of equinoctial America, in shaded places, where the air is loaded with 
vapour arising from aqueous exhalations or condensation of clouds. Hum- 
boldt. Also in similar situations in India. One species is found in Japan. 
* The genera in this and the following §§ are to be considered arranged only provi- 
sionally. I have not yet made up my mind as to the order in which they had best follow 
each other. 
