142 THE FLORA OF THE ALPS 



large, pale yellow, stem 4-8 in., tumid at the base, root- 

 stock coral-like ; on rotten wood, very rare. 



18. LiMODORUM, Sw. 



Sepals and petals sub-campanulate ; lip entire, concave, 

 spurred ; pollen-masses 2. Not alpine. 



L. abortivumj Sw. ; whole plant of a violet tinge, 

 flowers large, violet, stem 15-30 in., leaves reduced to 

 sheathing coloured scales ; woods ; Switzerland, Jura, 

 Styria, Pyrenees, very rare. 



19. Spiranthes, Rich. 



Flowers small, white, in spiral spikes; sepals and 

 petals alike, sepals gibbous at the base, forming a tube 

 round the lip ; pollen-masses 4, powdery ; stem leafy. 



5. autumnalisy Rich. {Neottia spiralis ^ Sw.), Lady's- 

 Tresses ; stem 4-6 in., slender, with small distant leaves, 

 spike dense, pubescent, lower leaves in lateral rosettes, 

 ovate, acute ; open hill-sides, local. S. cEstivalis^ Rich. ; 

 stem 6-18 in., spike elongated, slender, flowers larger, 

 stem with two or three linear-lanceolate leaves ; bogs, rare. 



20. Epipactis, Rich. 



Flowers in bracteate racemes, green or purple; ovary 

 straight, on a twisted stalk ; basal lobe of lip concave ; 

 pollen-masses 2, powdery; rostellum short, erect; stem 

 leafy ; capsule pendant ; root-stock creeping. 



E. latifolia, Sw., Helleborine ; flowers green variegated 

 with purple, lip lilac, stem 2-3 feet, leaves broadly ovate ; 



