258 GYNANDRIA MONANDRIA. Listera. 



Open pastures, chalky, or gravelly soil, meadows. Sm. On the 

 south side of Shotover Hill. Sb. Shotover Hill. R. W. 1831. 



Per. August. 



Bulbs several, oblong. Stem single, five or six inches, with a few- 

 small, sheathing leaves. Spike terminal, erect, of many, small, 

 greenish- white, stalkless, sweet-scented flowers, leaning to one 

 side, but arranged in a spiral line, each overshadowed by a con- 

 cave, pointed bractea. Calyx-leaves, three glued together 

 appearing as one. 

 Generally found with three bulbs, and a small rose of leaves, and 



the stem almost bare to the flower-spike. 



LISTERA.' Listera, or Twayblade. 



L. ovdta. Common Twayhlade.^ Leaves elliptical, 

 opposite. Nectary with two linear-oblong, nearly 

 parallel, lobes. Column with a posterior hood, and 

 with an appendage, in which is placed the anther. 

 Ophrys ovata. E. B. 1548. C. 3. 60. Ophris bifo- 

 lia. G. E. 402. 



Groves, tliickets, meadows, pastures. Stow Wood. Shotover. 

 South -Leigh. Sb. 



Per. May. 



Root fibrous, perennial. \^^ole plant greenish. Stem a foot, or 

 eighteen inches, with a pair, generally, of sheathing, elliptical, 

 ribbed, smooth leaves, like those of plantain. Below the leaves, 



• the stem angular, smooth ; above them, round, downy, termi- 

 nating in a long spike of numerous green flowers, each on a 

 foot-stalk, with an acute bractea, not half the length of the ger- 

 men. Cal. lightly tinged with brown. Fl. fragrant. Seed- 

 vessel globose. 



L. Nidus avis. Bird's-nest L. Leaves none. Stem 

 clothed with sheathing scales. Nectary with two 

 spreading lobes. H. L. 58. Ophrys Nidus avis. E. 

 B. 48. Satyrium abortivum, sive Nidus avis. G. E. 

 228. 



Shady woods, especicdly beecli, on chalk, or loam. Sm. * * Most 

 abundantly in the fine beech woods about Hurley, Berks. Sm, 

 Eng. Fl. Tar Wood. Stokenchurch Woods. Sb. (Bagley 

 Wood. B.i\ and Rev. Mr. White, Fellow of Magd. Coll. Oxford. 

 Wood, near Cumnor Hill. Y.) 

 This plant in habit nearly approaches to the genera Orobanche, 



Lathrsea, and Monotropa, found among decayed leaves. 



Bulbs in bundles. Whole plant pale brown. Bract, sheathing, 



' After Dr. Martin Lister, the conchologist. 

 - From its two leaves, Iway, or tico, for twain. 



