Listera.] ORCHIDE/E. 279 



plied by Dodonaeus, and even by Linnaeus, to our Listera 

 Nidus- Avis, on account of its densely tufted fibres ; but sub- 

 sequently abandoned. It has since been chosen by Jacquin 

 for the present genus, which is sanctioned by the high autho- 

 rity of Swartz, Willdenow, Smith, and Brown. " It is Spi- 

 ranthes of Richard." (Hooker.) 



Gynandria. Monandria. 



1. N. spiralis, Rich. Fragrant Lady's Tresses. Root-leaves 

 oblong, subpetiolate ; spike twisted, unilateral; lip oblong. 

 Br. Fl. 1. p. 376. E. Fl. v. iv. p. 35.— Ophrys spiralis, Linn. 

 —E.Bot. t. 541. 



Dry pastures. I found this on Bray-common, in August, 1810, 

 where it was subsequently observed by Doctor Taylor. Phcenix Park, 

 between Chapelizod and the Magazine ; Mr. Leslie Ogilby and Mr. 

 J. Johnston. Near Cork ; Rev. William Hincks. Fl. Aug. Sept. 

 11.— Tubers oblong, three to four. Stem four to six inches high, 

 rather bracteated than leafy. Flowers singularly spiral on the stalk, 

 greenish-white. Upper sepal and two inner petals combined. Lip 

 longer than the rest of the flower, oblong, broader and crenate at the 

 apex. Stigma and anther both acuminate. 



2. N. gemmipara, Sm. Proliferous Lady's Tresses. Leaves 

 lanceolate, as tall as the stalk; spike 3-ranked, twisted; brac- 

 teas glabrous. Br. Fl. I. p. 377. E. FL v. iv. p. 36. E. Bot. 

 Suppl. t. 2786. 



Dunboy, near Bearhaven, County of Cork, 1810, in small quantities ; 

 Mr. J. Drummond, but no one has since found it. Fl. July. %. — 

 I have not seen a specimen of this rare plant. 



6. Listera. Br. Bird's-nest or Twayblade. 



Perianth irregular. Lip 2-lobed. Column wingless. Anther 

 fixed by its base. Pollen farinaceous. Br. — Named in ho- 

 nour of Dr. Martin Lister; an eminent British Naturalist. 



Gynandria. Monandria. 



1. L. ovata, Br. Common Twayblade. Stem with only a 

 pair of ovato-elliptical opposite leaves ; column of fructification, 

 with a crest in which the anther is placed. Br. Fl. I. p. 377. 

 E. Fl. v. iv. p. 37. — Ophrys ovata, Linn. E. Bot. t. 1548. 



Woods and sandy moist meadows, frequent. Fl. June. %.— -One 

 foot high. Leaves striated. Flowers distant upon the spike, yel- 

 lowish-green. Calyx-segments (sepals) ovate ; two lateral petals 

 linear-oblong ; lip long, bifid, without any teeth at the base. Bracteas 

 very short. 



2. L. cordata, Br. Heart-leaved Twayblade. Stem with 

 only two, cordate, opposite leaves; column without any crest; 

 lip with a tooth on each side at the base. Br. Fl. 1. p. 377. 

 E. Fl. v. iv. p. 38. — Ophrys cordata, Linn. — E. Bot. t. 358. 



Moist heaths among moss. At Lough Bray, above the lower lake ; 



