RANUNCULUS.] RANUNCULACE^. 7 



leaves, flowers f in. diam., petals broadly obovate, receptacle hispid, 

 achenes glabrate or hispid acute. R. diva'ricatus, Schrank. 

 Still and slowly-flowing water from Forfar southd., not common ; Ireland ; 

 fl. June-Aug. Much the most distinct species of this section, very uniform 

 in size, habit, and character. Leaves ^-| in. diam. ; stipules wholly adnate, 

 like leaf -sheaths. Peduncles tapering. Petals twice as long as the sepals, 

 many-veined. Stamens many, longer than the pistil. Achenes compressed ; 

 style slender deciduous. DISTRIB. Europe (local), N. America. 



*** Marsh- or mud-plants, creeping, rarely floating. Submerged leaves (very 

 rare in R. tripartitus). Petals 3-5-nerved. Receptacle glabrous or nearly so. 



6. R. triparti'tus, DO. ; leaves ^-orbicular or reniform 3-lobed or 

 partite, segments cuneate spreading, tips crenate, submerged when present 

 very few arid flaccid, peduncles shorter than the leaves, flowers \ in. 

 diam ., petals narrow, achenes few glabrous. R. inter me' dius, Hiern. 

 Marshes and ditches in S. and W. England ; fl. May-July. Stem aerial, or 



floating with emerged tips. Leaves ^-f in. diam. ; stipules broad, upper 

 rounded free. Peduncles equalling the leaves or shorter. Petals 3-nerved, 

 about twice as long as the calyx, pinkish. Stamens few, longer than the 

 pistil. Receptacle slightly hairy. A chenes turgid ; style slender, deciduous. 

 DISTRIB. W. Europe. With difficulty distinguished from forms of 

 heterophyl'lus. 



7. R. Lenorman'di, Schultz ; leaves all reniform or orbicular, lobes 

 shallow, bases contracted, peduncles equalling the petioles, flowers 

 |-| in. diam., petals remote oblong, receptacles glabrous, achenes many 

 glabrous. 



Marshes and ditches from the Clyde southd. ; ascends to 1,600 ft. in York- 

 shire ; S. Ireland ; fl. June-Aug. Stem stout, branched, 2-8 in. long. 

 Leaves ^-1 in. diam., often opposite, rounded and more crenate than R. 

 hederaceuSj never spotted ; stipules large, broad. Petals 5-nerved, twice as 

 long as the calyx. Stamens few, about equalling the pistil. Achenes with 

 deciduous subterminal slender styles. DISTRIB. N.W. Europe. 



8. R. hedera'ceus, L. ; leaves reniform angularly 5-7-lobed, lobes 

 broadest at base, peduncles usually shorter than the leaves, flowers 

 -g in. diam., petals very narrow, distant, receptacle glabrous, achenes 

 few obtuse. Ivy -leaved Crowfoot. 



Shallow ponds and ditches from Shetland southd., ascends to 2,200 ft. in 

 Wales; Ireland ; Channel Islands ; fl. May- Aug. Habit of E. Lenorman'di. 

 Leaves 5-!^ in. diam., usually opposite, with a -lunar black patch, lobes 

 broader than long, rarely notched ; stipules various. Petals 3-nerved, 

 sometimes hardly exceeding the calyx. Stamens few, about equalling the 

 pistil. Achenes small. DISTRIB. W. Europe. R. homoiophyl'lus, Tenore 

 ( R. cceno'sus, Guss.), is a floating form. 

 SECTION 2. Hecato'nia. Perennial, rarely annual. Leaves mostly 



radical, stipules obscure or 0. Stems 2- or more-flowered. Sepals 5. 



Petals 5, yellow. Achenes not tubercled (granulate in JK. ophioglopsi- 



folius}. 



