210 147. Listera. 21. ORCHID EM. Vl.end.ph 
1. Listera ovata. Ovate tway blade. 
Leaves ovate. 
Bifolium majus, sive Ophris major quibusdam, Raii Syn. 385, 
Ophris bifolia, Ger. em. 403. 
Bifolium sylvestre vulgare, Park. 504. 
Ophrys ovata, Lin . S. P. 1340. 
Epipactis ovata, Swartz 162. 
Listera ovata, R . Brown in Ait. H. Kew. 5, 20L 
Neottia latifolia, Richard Mem. Mus. 4, 59. 
Common twayhlade. 
Woods and meadows; perennial; June and July. 
Stem 12 in. high, 2-leafed; flowers pedicelled, green. 
2. Listera cordata. Heartleafed twayhlade . 
Leaves heartshape. 
Bifolium minimum, Raii Syn. 385, 2. 
Ophrys cordata, Lin. S. P. 1340. 
Epipactis cordata, Swartz 162. 
Listera cordata, R. Brown in Ait. H. Kew. 5, 201. 
Neottia cordata, Richard Mem. Mus. 4, 59. 
Least twayhlade . 
Spongy Alpine heaths ; perennial ; July 
Stem 6 in. high ; flowers greenish. 
XIV. 148. CEPHALANTHERA. Richard. 
Bastard-hellebore. 
Ovary sessile, bald, not twisted; perigonium upright, 
connivent; lip spurless, clasping, interrupted; hypochi- 
lium gibbous at the back; epichilium bent back at the 
tip ; gynostemium long, straight ; gynizus transversely ob- 
long, prominent; rostellum 0; anther marginal, elliptical 
roundish, fastened to the back of the gynizus by its base, 
the other part overtopping the gynizus, the cells growing 
forwards on a connective wider than themselves; pollen 
in linear masses, adhering only to the back of the gynizus 
by their base ; vesicles simple. — Rhizoma creeping ; fibres 
fleshy ; stem leafy ; leaves amplexicaul, 2-rowed, lanceolate, 
ribbed; spike loose; flowers upright, bracteate; ovary 
linear. 
1. Cephalanthera grand flora. Largeflower bastard- 
hellebore . 
Leaves oblong, lanceolate, sessile; bractece longer than 
the flower ; Up obtuse, shorter than the sepales. 
