22 ENGLISH BOTANY. 
In ponds and ditches. Apparently much less common and more 
local than R. peltatus. 
England, Scotland. Perennial. Spring to Autumn. 
Stem branched, floating, the extremity frequently rising out of 
the water. Stipules broad, membranous, whitish, with free rounded 
auricles. Submerged leaves dark green, with the middle primary 
segments less than the lateral ones. Peduncles about as long as 
the leaves opposite to which they spring, slender, narrowed under- 
neath the flower, curved downwards at the base after flowering, 
the upper part remaining nearly straight. Petals twice as long as 
the calyx, with a very straight border to the nectary, white, yellow 
at the base, spreading like the rays of a star when the flower is 
fully expanded. Carpels as in R. peltatus, from which it differs in 
the submerged leaves collapsing when taken from the water, the 
floating leaves being more nearly a complete circle in outline, and 
the segments being bounded by straight lines rather than by curves. 
The crenatures at the tip much more deeply indented, and more 
acute at their apex. The peduncles less regularly arched through- 
out after flowering. 
The name “ heterophyllus ”’ has been used for all the varieties 
of R. aquatilis, which have leaves of two kinds; but has not been 
adopted by modern authors as a specific name until restricted by 
Fries to the present form. 
Sus-Srecres IIL.-—Ranunculus Drouetii. Schultz. 
PuatE XX. 
Bab. Ann. Nat. Hist. ser. ii. Vol. XVI. p. 391; and Man. Brit. Bot. ed. v. p. 6. 
Gr. & Godr. Fl. de Fr. Vol. I. p. 42. Boreau, Fl. du Cent. de la Fr. Vol. IT. p. 12. 
Submerged leaves trifurcate, afterwards repeatedly bifurcate. 
Segments flaccid, collapsing into a pencil when drawn from the 
water. Floating leaves rarely produced, tripartite or ternate, the 
segments wedge-shaped, incised at the apex. Flowers 3 inch in 
diameter, or less. Petals oblanceolate, 5- to 7-veined, not conti- 
guous. Stamens 5 to 10. Carpels half-obovate, inflated at the apex. 
In ponds and ditches. Probably common. 
England, Scotland. Perennial, Spring to Autumn. 
Stem slender, slightly branched, floating. Stipules broad, mem- 
branous, whitish, with short, free, rounded auricles. Submerged 
leaves bright green, the lower ones shortly stalked, the upper sessile. 
The primary segments stalked; intermediate one much shorter 
than the others and directed downwards. Floating leaves stalked, 
