242 MONOCOTYLODENOtrff, 



Order CVI. ORCHIDE^E. 



Perianth superior, ringent, 6-parted, the 3 outer segments 

 colored, the odd one uppermost from tlie twisting of the ova- 

 ry, the 3 inner colored, with the odd one below, which is fre- 

 quently lobed and different from the others, often spurred. 

 Stamens 3, united into a central column, epjgynous, the two 

 lateral ones usually abortive. Pollen powdery, or in waxy 

 masses. Ovary usually l-celled, with 3 parietal placentae. — 

 Ovules numerous. Style forming a part of the column with 

 the stamens. Stigma a viscid cavity in front of the column. 

 Fruit u&ually an inferior capsule, rarely baccate. Seeds nu- 

 merous. Albumen none. Herbaceous plants, usually with 

 tuberous roots. Leaves simple, entire. 



Genus I GOODYERA. 



Perianth ringent, the two outer lateral segments situated 

 beneath the lip, the interior segments ovate, with the lip gib. 

 bous at the base, undivided at the summit. Pollen consisting 

 of granules in a loose state of cohesion, angular, column free. 



1 G PcTBESCENS. Stem pubescent towards the summit. Sadide leaves 

 ovate, petiolate, reticulate, veined with white. Flowers in an oblong spike. 

 Zrip ovate, acuminate. Battle snake plantain. 



White. % July — August. Shady woods. 6-10 in. 



Genus II NEOTTIA. (Syn. Spiranthes,) 



Perianth ringent, the two outer segments affixed beneath 

 the lip, interior ones connivant. Lip unguiculate, parallel to 

 the column. Pollen farinaceous. 



1 N ToRTiLis. Stem pubescent towards the summit. Radicle leaves li- 

 near, glabrous ; cauliiie ones subulate, acute. Scope shevLthed. Flowers in 

 compact, spiral spikes, ihe lip 3-cleft, the middle lobe large and crenulate. ' 



White. %■ June — July. Damp soils. Through the summer. 8-12 in. 



2 N Cernua. /S<e7n erect, sheathed. ZeatJes lanceolate, nerved. Flou-ers 

 in dense spikes, recurved, nodding. Lip oblong, acute, entire. This plant 

 varies much in the form of its leaves and the size of its flowers, and in the 

 time of their blooming. 



Greenish white. % Through the summer. Moist grounds. 1-2 ft. 



Genus III LISTERA. 



Perianth irregular. Lip pendulous, 2-lobed, sessile, column 

 minute, free. Pollen farinaceous. 



1 L PuBESCENS. Stem erect, pubescent, leafless. Leaves all radicle, ovate, 

 acute. Flowers in racemes, the lip 2-lobed, the other segments connivant» 

 about as long as the lip. Capsule clavate. 



Greenish white. '21- June— July. Pine barrens. Car. & Ga 



% L CoNVALLAROiDEs. Stem erect, with 2 opposite, sessile leaves near the 



