I. EANUNCULACE^. 



179 



style. — Low herbs, witli perennial rootstock, only diifering from Banunculus in the dioecious 

 flowers. Antarctic America. 



12. OxygrapMs. — Sepals 5, persistent. Petals 10-15, with a basal nectariferous pit. 

 Carpels numerous. A'chenes capitate, beaked by the persistent style. — Low herbs, rootstock 

 perennial. Leaves radical, entire. Scapes naked. Flowers solitary, golden-yellow. Mountaitis 

 of extra-tropical Asia. 



Tribe IV. Hellebores, D.C. — Elowers regular or irregular {Aconitum, Del- 

 phinium) . Sepals imbricate, petaloid. Petals small, or irregular and nectariferous, 

 or {Galtha, Hydrastis). Carpels several-ovuled, dehiscent when ripe, rarely berry- 

 like {Actcea, Hydrastis), follicular, free, rarely connate into a several-celled capsule 

 {Nigella). Herbs. Leaves all radical, or the cauline alternate. 



Caltha. 

 Bipe fruit. 



Calllia. 

 Stamen (mag.). 



€aXtha. Tomig carpel (mag.). 



Caltha yaluairis.. 



Caltha. 

 Seed witli fungoid chalaza (mag.). 



Caliha. 

 Flower cut vertically. 



Caliha. 

 Pistil and portion of andrcecium. 



13. *Caltha. — Sepals S-oo , equal, coloured, deciduous. Petals 0. Carpels few or many, 

 sessile ; ovules many, 2-seriate, follicular when ripe. Seeds obovoid ; testa crustaceous, 

 smooth, raphe prominent. — Glabrous perennial herbs, tufted, or with a perennial rootstock, 

 Leaves radical, palminerved, entire or crenulate, cordate or auricled, cauline few or 0. 

 Flowers yellow or white, one or few. Stamens and carpels numerous or few. Europe, Asia, 

 America, Australia, New Zealand. 



14. Calathodes.— Sepals 5, regular, coloured, deciduous. Petals 0. Carpels numerous, 

 sessile, distinct ; ovules 8-10, 2-seriate near the base of the suture.— A perennial erect herb, 



N 2 



