RANUNCULUS 
151 
caducous ; laminae suborbicular in general outline, rigid, tending to remain in the horizontal plane, 
not collapsing when taken out of the water, about 2 — 3 cm. in diameter. Floating leaves absent. 
Pedicels rather slender, much longer than the leaves, up to about 3*5 cm. long. Receptacle sub- 
globose, hirsute. Flowers up to 2 cm. in diameter ; late May to early August. Sepals ultimately 
reflexed. Petals 2 — 3 times as long as the sepals, usually contiguous or nearly so. Stamens about 
15 — 20, longer than the ovaries. Stigma narrow. Achenes about 30 — 35, rather hirsute. 
This is one of the most easily distinguished species of the series Aquatiles ; yet it is frequently confused with 
R. trichophyllus var. rigidus. 
(/ 3 ) forma terrestris nobis; R. divaricatus var. terrestris Grenier et Godron FI. France i, 25 (1848); 
R. foeniculaceus var. terrestris Rouy et Foucaud FI. France i, 71 (1893). 
This is the mud-form of the species. 
In slowly moving and rather deep rivers with a high mineral-content; from Devonshire 
and Kent northwards to Perthshire and Ross-shire, but rare in Scotland; Ireland — chiefly in 
the east. 
Scandinavia (excl. northern), Denmark, Germany, Holland, Belgium, France, central Europe, 
Russia, southern Europe; Asia; North America. 
