GYNANDRIA DODECANDRIA. 421 



353. ORCHIS. Corolla ringent ; upper lip vaulted ; Zip dilated, with a 

 spur beneath; pollinia 2, terminal, adnate. 



354. HABENARIA. Corolla ringent ; Up spurred at the base beneath ; 

 glands of the stalks of the pollinia naked and distinct ; cells of the 

 stalks adnate, or separated. 



* * Anther persistent, parallel with the stigma. Pollinia affixed 



to the summit of the stigma, composed of angular grains, or 

 farinaceous. 



'355. GOODYERA. Corolla ringent; the 2 lower petals placed be- 

 neath the gibbous lip, which is undivided at the extremity ; column 

 free ; pollen angular. 



356. NEOTTIA. Corolla ringent; the 2 lower petals placed beneath 

 the lip, which is beardless ; interior petals connivent ; column apte- 

 rous ; pollen farinaceous. 



357. LISTERA. Corolla irregular; lip 2-lobed, pendent; column 

 apterous ; anther fixed by the base. 



* * * Anther terminal, inserted, persistent. Pollinia farinaceous 



or angular, affixed by the base or below the extremity. 



358. POGONIA. Petals 5, distinct, without glands; lip sessile, cu- 

 cullate, internally crested ; pollen farinaceous. 



359. CALOPOGON. Petals 5, distinct; lip behind, (or inverted,) 

 unguiculate ; the lamina bearded ; column free; pollen angular. 



360. ARETHUSA. Petals 5, connate at the base ; lip beneath grow- 

 ing to the column, cucullate above, and crested internally. 



* * * * Anther terminal, moveable, deciduous. Pollinia at length 



becomes waxy. 



361. MALAXIS, Petals 5, narrower than the lip, spreading or deflex- 

 ed ; lip flattened, undivided, sessile, often exterior ; pollinia 4, par- 

 allel with each other, fixed to the stigma by their extremities. 



362. CORALLORHIZA. Petals equal and connivent; lip mostly 

 produced at the base ; column free ; pollinia 4, oblique, (not par- 

 allel.) 



DIANDRIA. 



363. CYPRIPEDIUM. Lip ventricose, inflated, saccate; petals 4; 

 the under one bifid ; column terminating in a petaloid lobe. 



DODECANDRIA. 



3(54. ASARUM. Calyx subcampanulate, 3 4-cleft; corolla 0; an- 

 thers adnate to the middle of the filaments; capsule inferior, 6-celled, 

 crowned with the calyx. 



