a 
eo  — 
OS ae aa = eee eee eee 
ORCHIDACE & 625 
only the anther opposite to the lower sepal perfect and ‘2 rudi- 
mentary lateral ones, in Cypripedium the lateral ones perfect, 
the third sterile. Anthers2-celled. Pollen more or less coher- 
ent in 1-4 masses, rarely wholly granular. Stigma oblique and 
concave, mostly viscous, the upper margin often produced into 
an erect beak. Capsule coriaceous or membranceous, dehiscing 
usually by 3 placentiferous valves which separate from the per- 
sistent midveins of the carpels. Seeds very numerous, scobi- 
orm, without albumen. 
TrirE 1 Anther one, resting likea lid upon the column, de- 
ciduous. Pollen masses 4, smooth and waxy. 
1 Calypso Scape solitary and 1-flowered, from a solid bulb, witha single 
green leaf: lip saccate: column broadly winged. 
2 Corallorhiza Stems one to several from a branched coral-like root: 
leaves ail reduced to scale-like bracts: flowers in a terminal raceme, 
spurred or gibbous at base: lip expanded or concave, bilamellate-crest- 
ed: column semiterete. 
TripEe 1 Anther one, connate with the column and resting 
upon its face just above the stigma. Pollen masses 2, of coarse 
grains united by an elastic web. 
3 Habenaria Stems oneto several from a solid corm: flowers numerous, 
in a terminal raceme: lip flat, spurred. 
Trise ur Anther 1, erect and sessile or nearly sc upon the top 
of the column, more or less covering and declinate upon the back 
of the stigma. Pollen masses 2 or 4, of loosely cohering grains. 
4 Gyrostachys Stems one to several from fleshy fascicled roots: flowers 
numerous in a twisted spike: lip flat, the base embracing the short 
column. 
5 Peramium Stem solitary from a somewhat creeping rootstock: flowers 
several in a terminal spike; lip saccate, entire, free from the column. 
6 Listera Stem solitary from a fascicle of fleshy-fibrous roots with a pair 
of sessile leaves in the middle; flowers rather few, in a terminal raceme: 
lip flat. 2-lobed. — 
7? Epipactis Stems stout, leafy, several from fleshy-fibrous roots: lip 
concave, somewhat jointed in the middle and auriculate at base: 
anther sessile behind the beaked stigma. 
8 Cephalanthera Stems stout, from a somewhat creeping rootstock: 
flowers in a terminal raceme: lip concave and auriculate at base: an- 
ther shortly stipitate: stigma beakless. 
TriBE Iv Perfect anthers 2, lateral. Pollen pulpy-granular. 
9 Cypripedium Stems leafy, from more or less creeping rootstocks: 
flowers mostly few, in a terminal raceme: lip an inflated sac. 
Tribe 1 Malaxidex Lindl. Orch. 3. Herbs with simple stems 
without green foliage, or a sungle green radical leaf. Anther one, 
terminal and resting like a lid upon the column, deciduous. Pollen 
masses 4, smooth and waxy. 
