314 82. ORCHIDACE^. 



2. GYMNADENIA. Glands of the pollen-masses without a 

 pouch. Otherwise like Orchis. 



3. ACERAS. Lip without a spur. Otherwise like Orchis. 



** Cells of the anther without any process between their bases. 



4. HABENARIA. Perianth ringent, hooded. Lip 3-lobed or 

 entire, spurred. Glands of pollen-masses naked. 



5. OPHRYS. Perianth patent. Lip variously lobed, without 

 a spur. Glands of pollen-masses each in a distinct pouch. 



6. HERMINIUM. Perianth bellshaped, segments all erect. 

 Lip 3-lobed, tumid beneath at the base, without a spur. 

 Glands of the stalks of the pollen-masses exserted, naked. 



Tr. II. NEOTTIDE^E. Anther attached by its base, persistent. 

 Pollen-masses granular ; granules only in a slight state of 

 cohesion ; no stalks. Root of many fleshy fibres, rarely of 

 2 4 much thickened ones. 



* Stigma rostellated. 



7. GOODYERA. Perianth ringent. Lip saccate at the base, 

 entire, included. Stigma subcordate. Rostellum erect, bi- 

 partite, with a large squarish appendage between its slender 

 segments. 



8. SPIRANTHES. Perianth ringent. Lip channeled, clawed, 

 fringed. Stigma roundish. Rostellum straight, bifid, with 

 an elongate linear appendage between its points. 



9. LISTERA. Perianth ringent. Lip deflexed, 2- lobed. Stigma 

 transverse. Rostellum" long, entire, acute, with a minute 

 globose appendage at its somewhat reflexed apex. Column 

 very short. 



10. NEOTTIA. Perianth hooded. Lip deflexed, 2-lobed, sac- 

 cate at the base. Stigma transverse. Rostellum flat, broad, 

 prominent, entire, without an appendage. Column long. 



11. EPIPACTIS. Perianth patent. Lip interrupted ; the basal 

 division concave ; terminal one (label) larger with 2 projecting 

 plates at its base above. Stigma nearly square. Rostellum 

 short, terminated by a globose appendage. Anth. terminal, 

 erect, sessile, 2-celled ; cells without septa. Column short. 

 Germen straight, on a twisted stalk. 



** Stigma without a rostellum. 



12. CEPHALANTHERA. Perianth converging (in C. rubra 

 spreading). Lip interrupted, the basal division saccate, 



