CL. XIII.] POLYANDRIA POLYGYNIA. 239 



of the uppermost linear and entire ; stem erect, covered with close- 

 pressed hairs. Stem two-feet high, many-flowered: calyx hairy: 



petals bright-yellow : nectary covered by a scale. Perennial : flower* in 

 June and July : grows in meadows and pastures : common. Eng. Bot. 

 vol. x. pi. 652. Eng. Fi. vol. iii. p. 51. 835. 



9. R. arveiisis. Corn Crowfoot. Calyx spreading; stem erect, much 

 branched, mauy-flowered ; leaves once or twice deeply three-cleft, with 



narrow lance-shaped segments. Leaves alternate : flowers small, with 



a hairy calyx, and pale-yellow petals : seeds large and prickly. This 

 plant is exceedingly acrid, and is said to be very dangerous to cattle. 

 Annual: flowers in June: grows in corn-fields: not common. En. 

 Bot. vol. ii. p. 135. Eng. FL. vol. iii. p. 52. 836. 



10. R. parviftorus. Small-flowered Crowfoot, Leaves simple, hairy, 

 sharply cut, the upper ones three-lobed ; stem prostrate ; seeds with 



hooked prickles. Leaves roundish, acutely notched, the uppermost 



with three deep lance-shaped segments : flowers small, yellow. An- 

 nual : flowers in May and June : grows in fields and by hedges: rare. 

 South of England, and near Dublin. Eng. Bot. vol. ii. pi. 120. Eng. 

 FL vol. ii. p. 53. 837. 



11. R. alpgstris. Alpine White Crowfoot. Leaves simple, smooth; 

 root-leaves somewhat heart-shaped, with three deep-lobed segments, 

 those of the stem lance-shaped, entire; flower generally solitary ; calyx 



smooth. Stem three or four inches high, erect, generally simple and 



one-flowered : petals white : calyx reflected, pale. This species also 

 is said to be extremely acrid. Perennial: flowers in May: grows by 

 the sides of alpine rills, on the Clova mountains, where it was discovered 

 by Mr. G. Don. Eng. Bot. vol. xxxiv. pi. 2390. Eng. Ft. vol. iii. p. 49. 



838. 



12. R. hedcraceus. Ivy-leaved Crowfoot. Stem creeping ; leaves 

 smooth, roundish, or kidney-shaped, with three or five rounded entire 



lobes ; petals small ; stamens from five to ten. Stem creeping or 



floating: leaves stalked, dark-green. Perennial: flowers from May to 

 August: grows in ditches and muddy places: common. Eng. Bot. 

 vol. xxviii. pi. 2003. Eng. Fl. vol. iii. p. 54. 839. 



13. R. aqudtilis. Water Crowfoot. Immersed leaves in fiae hair-like 



segments ; floating-leaves three-lobed, bluntly crenate. Stems 



branched, submersed : flowers on long stalks, rising a little out of the 

 water : petals white, yellow at the base. Perennial : flowers in May 

 and June: grows in ditches, ponds, and rivers: common. Eng. Bot. 

 vol. ii. pi. 101. Eng. Fl. vol. iii. p. 54. 840. 



20. TRO'LLIUS. GLOBE-FLOWER. 



Calyx none. Petals inferior, from five to fifteen, roundish, 

 deciduous. Nectaries numerous, linear, flattened, incurved, with 

 a single lip, somewhat tubular at the base. Filaments numerous, 

 bristle-shaped, shorter than the corolla ; anthers linear, erect. 

 Germen superior, numerous, sessile, columnar. Styles none; 

 stigmas pointed, spreading, shorter than the stamens. Follicles 

 cylindrical, pointed, recurved, collected into a round head. Seeds 

 several, egg-shaped, smooth. Name, from troll, a ball. 277. 



