CXXri. OECUIDACEiE. 357 



Tribe 1. Malaxideje. Anther opercular, deciduous. Pollen-masses 

 (pollinia) waxv, 2-4-8, without caudicle or separate stiematic elands 

 (Gen. 1-2.) 



Petals linear or filiform ; labellura entire ; column 



slender 1. Liparis. 



Petals oblong ; labellum 3-lobed, jointed with the 



produced. base of the short column .... 2. Polystachya. 



Tribe 2. Vande.e. Anther opercular, deciduous. Pollen-masses waxy, 

 2-4-8, fixed to a caudicle, united to a deciduous, stiematic eland. (Gen. 

 3-9.) 



* Pollen-masses 2. 



Labellum wholly spurless. 



Sepals and petals free. — Epiphytes, with 



panicled flowers 3. Cymbidium. 



Sepals and petals connate with the much- 

 produced base of the column. — Ground 

 orchids, with racemose flowers .... 5. Cyetopeea. 

 Labellum saccate or shortly spurred at base. 



Sepals and petals subequal 4. EULOPHIA. 



Petals much larger and brighter- coloured 



than the sepals 6. LissocuiLUS. 



Labellum with a long, filiform or cylindrical 

 spur. 

 Pollen with a short caudicle and triangular 



gland 7. Anoe^cum. 



Pollen with a 2-legged caudicle, each leg 



with a peltate gland 8. Mystacidium. 



** Pollen-masses 8, united in fours. Ground 



plants, with racemose flowers 9. Calanthe. 



Tribe 3. Opheyde^. Anther terminal, persistent. Pollen masses gra- 

 nular, indefinitely numerous, clustering round a liighly elastic, slender 

 thread, attached at base to a stigmatic gland. (Gen. 10-39.) 

 * Labellum with one spur, or at least saccate at 

 base. 

 Anther-cells parallel, not divergent at base. 

 Petals entire. 



Labellum 3-5-7-lobed. 



Petals spreading, larger than the 



sepals 10. HoLOTHEix. 



Petals erect, thin, much smaller than 



the sepals 20. Schizochilijs. 



Labellum expanded, multifid, the lobes 



filiform 21. Baetholina. 



Petals (and labellum) lacero-multifid . . 15. Scopulaeia. 

 Anther-cells divergent at base. 



Having both radical and cauline leaves 

 or sheatlis. 

 Spur very short or saccate . . . .11. Peristylus. 



Spur long or very long 16. Habenaeia. 



Having 1-2 radical leaves only ; scape 

 sheatliless. 

 Labellum posticous ; sepals converging, 



the lateral saccate 12. Saccidium. 



