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. abortivum, 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. 
S. autumnalis, Rich. (Veottia spzralis, 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. @st¢valzs, 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 ; 
