128 OUR NATIVE ORCHIDS 



from the stalk on pedicels fully half an inch long, so that 

 each flower with its curved thread-like side petals, and 

 broad, striped incurved lip, stands out distinctly and inde- 

 pendently, working a very striking effect for so small and 

 pale a plant. 



The fruit is a ribbed club-shaped capsule on a thickened 

 pedicel. As these capsules stand erect upon the stalk they 

 present a totally different appearance from the other Tway- 

 blades of the genus Listera, where the ovoid capsules are 

 pendent on the stalk. 



The Large, or Lily-leafed Twayblade blooms from 

 May to July, according to the locality. It ranges from 

 Georgia and Missouri to Maine and Minnesota, and ascends 

 to 3,000 feet in Virginia. 



2. FEN ORCHIS, OR LOESEl's TWAYBLADE 



Leptorchis Loeselii (L.) MacM. (Plate XLIX.) 



This Twayblade has a strongly ribbed scape rising 

 from two to eight inches in height and clasped by a pair of 

 pointed elliptical leaves which are sometimes six inches long. 

 The raceme bears only a few greenish flowers which are 

 smaller than in the other species. The sepals are narrowly 

 lanceolate and spreading. The petals are linear and curved 

 backward, while the wavy, minutely scalloped lip is curved 

 down and under, forming a threshold for the insect to cling 

 to and clamber up. 



The sharp angles of the ovary, with its jagged ribs and 



