342 GYNANDRIA HEXANDRTA. [cL. XX. 



of Little Loch Broom, in Ross-shire; RavelrigBog, and bog to the 

 south of Dalmahoy-hill, near Edinburgh ; sands of Barry, near 

 Dundee. Eng. Bot. vol. xx. pi. 1547. Eng. FL vol. iv. p. 49. Ophrys 

 Corallorhiza. 1264. 



DIANDRIA. 



11. CYPRIPE'DIUM. LADIES'-SLIPPER. 

 Calyx superior, of three lance-shaped, spreading, coloured 

 leaves, the upper one broadest. Petals two, about the same 

 length, spreading, narrow lance-shaped. Nectary spurless, with 

 an inflated, obtuse, prominent lip, having an irregular longitu- 

 dinal fissure above. Filaments two on the style, lateral, oblong. 

 Anthers lateral, elliptical. Germen oblong, triangular. Style 

 short, somewhat compressed, terminating above the stamens in 

 a dilated lobe ; stigma beneath this lobe, and parallel to it, di- 

 lated and flattened. Capsule oblong, angular. Seeds oblong, 

 numerous. Name from Cypris, Venus, and podion, a slipper. 



418. 



1. C. Calceohts. Common Ladies' -slipper. Stem leafy ; termi- 

 nal lobe of the style elliptical, obtuse, channelled ; lip somewhat 

 compressed, shorter than the petals. Root tuberous, branch- 

 ing : stem a foot high : flower solitary, terminal, large, dark-brown. 

 Perennial : flowers in June : grows in woods : has been found in a 

 few places in the north of England onl) r . Eng. Bot. vol. i. pi. 1 . 

 Eng. FL vol. iv. p. 51. 1265. 



HEXANDRIA. 



12. ARISTOLO'CHIA. BIRTHWORT. 



Calyx superior, of one leaf, tubular, coloured, permanent ; 

 nearly globose at the base, with the limb dilated. Corolla none. 

 Filaments none ; anthers six, sessile, on the outer surface of a 

 notched cup, crowning the germen, two-celled, each cell two- 

 valved. Germen inferior, oblong, angular. Style very short ; 

 stigma nearly globular, six-lobed, the summit concave. Capsule 

 large, oval, six -cornered, six-celled, six-valved. Seeds nu- 

 merous in each cell, triangular. Named from its supposed me- 

 dical power. 419. 



1. A. Clematitis. Common Birthwort. Leaves heart-shaped; 



stem erect ; flowers aggregate, erect. Roots long, slender : 



stems about two feet high, erect, zig-zag, leafy, unbranched ; 

 flowers, several from the bosom of each leaf, on simple stalks, pale- 

 yellow. Perennial : flowers in July and August : grows in woods 

 and thickets, and among ruins in the south of England, but is not 

 indigenous, having formerly been cultivated. Eng. Bot. vol. vi. pi. 

 398. Eng. Fl. vol. iv. p. 53. 1266. 



