KEY. 247 



base of the lip. Column arching. Tlie stigma usually with 

 a 2-cleft beak. Spike usually twisted. Flowers, small 

 white. Spiranthes, Rich. 



771, Lip bearded inside, its base adherent to the linear 

 column, which is petal-like below. Pollen-masses 4 (2 in 

 each anther-cell). Scape, from a globose, solid bulb, bear- 

 ing a single, large, rose-purple, fragrant flower. Leaf soli- 

 tary, linear. Arethusa bulbosa, L. 

 Lip not bearded. Anther lid-like 772 



77S. Lip auricled, cordate or sagittate at the base. 

 Column minute, round. Scape from a solid bulb, with 1 or 

 2 leaves, and a raceme of minute greenish flowers. 



Microstylis, Nutt. 

 Lip not auricled at the base 773 



773, Lip crested or 3-lobed. Column club-shaped. 

 Anther stalked. Stem 1- to 5-leaved. Flowers purple, either 

 a few axillary, or a solitary one. Fogonia. 



Lip entire, flat, often with 2 tubercles above the 

 base. Inner set of sepals thread-like. Column long, incurv- 

 ed, margined at the aj^ex. Scape low. Leaves 2. Flowers 

 purplish or greenish, racemed. Liparis. 



D. DICLINOUS FLOWERS. 



(774-903.) 



774, (4.) Sterile (staminate) and fertile (pistillate) flow- 

 ers separate, but on the same plant, monoecious 775 



Sterile and fertile flowers on two individuals of the 

 species, the one or other of these sorts borne exclusively (or 

 nearly so) by each, dioecious 840 



775, Trees or shrubs 776 



Herbaceous plants 797 



776, Pistil (fertile flower) an open scale ; the ovules at 

 its base fertilized by the direct application of the pollen ; 

 perianth none. Sterile flowers also naked. Both fertile and 

 sterile flowers in aments ; the fertile aments called cones, or 

 strobiles. Cotyledons often more, than 2. Leaves needle- 

 form, awl-shaped, filiform, or scale-like, flat, squamous. Coni- 

 fers 777 



