590 



ORCHIDACE^E. 



up its cylindrical stem, two opposite egg-shaped leaves ; 

 the flowers are small and green. It is not uncommon in 

 woods and orchards, and flowers in June. Listera cor- 



OVATA (Twayblttde). 



data is a much smaller plant, with two heart-shaped 

 leaves. It occurs in mountainous districts, and flowers 

 from June to August. 



Listera Nidus-avis (Bird's-nest) is a pale reddish- 

 brown plant, about a foot high, entirely destitute of 



