16 ENGLISi BOTANY. 
Tribe ITI.—RANUNCULEZ. 
Sepals imbricated. Ovaries 1-ovuled. Ovule ascending, with 
the raphe ventral. Achenes indehiscent, usually indefinite. 
GENUS VI—-RANUNCULUS. Jinn. 
Sepals generally 5 (rarely 3), caducous. Petals 5, or more 
(up to 15), with a nectariferous pore at the claw, covered by a 
small scale, or simply with an elevated border on the lower side. 
Stamens indefinite, or sometimes definite. Achenes in several 
rows, forming a globular, ovoid, or oblong head, and apiculate or 
rostrate by the persistence of the short style or its base. 
The British species have all yellow or white flowers. 
Sus-Genus I.—BATRACHIUM. D.C. 
Sepals 5. Petals 5, without a scale covering the nectary. Style 
short. Carpels with transverse waved ridges. Aquatic plants, with 
the lower or even all the leaves divided into linear capillary 
segments. Stipules conspicuous, membranous. Peduncles opposite 
the leaves, or rarely axillary, arched backwards after flowering. 
Petals white, with a yellow base in the British species; nectarife- 
rous pore without a scale, but having a prominent border on the 
lower side of the opening. 
SPECIES I—RANUNCULUS CIRCINATUS. Si. 
PLatE XV. 
Reich. Ic. Fl. Germ. et Helv. Vol. III. Ran. Tab. II. Fig. 4575. 
Bab. Ann. Nat. Hist. ser. ii. Vol. XVI. p. 401; and Man. Brit. Bot. ed. v. p. 8. 
Batrachium circinatum, Fries, Mant. III. p. 52. 
Ranunculus divaricatus, “Schrank,” Koch. Syn. Fl. Germ. et Helv. ed. ii. p. 13. 
Gr. & Godr. Fl. de Fr. Vol. I. p. 25. Boreau, Fl. du Centre de la France, ed. iii. 
Vol. II. p. 12. 
Ranunculus aquatilis y, Sm. Eng. Fl. Vol. IIT. p. 55. 
Ranunculus stagnalis, Wall. Sched. Crit. p. 285. 
Submerged leaves almost sessile, orbicular in outline, divided 
into short comparatively rigid capillary segments spreading in one 
plane ; floating leaves none. Stipules narrow, entirely adnate, 
without auricles. Peduncles much longer than the leaves, slightly 
