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188 DICOTYLEDONES.

RANUNCULACÆ.

1., foliis radicalibus elongato-petiolatis dilatatis lobatis : lobis subovatis ; caulinis subsessilibus palmatis, caule erecto subiinifloro, petalis obovatis integerrimis longioribus calyce hirsutissimo, stylis rectiusculis ovaria glabra gequantibus.

Ranunculus nivalis, ''Wahlenb.lapp. p.'' 156. ''Schlechtend. ranuncul. sect. post. p.'' 14.

β. folia radicalia basi cuneata vix ad medium lobata, lobo medio semiovato basi latiore, petala orbiculato-obovata calyce hirsutissimo sesquilongiora.

Ranunculus nivalis β. ''Waldenb. lapp. p.'' 157 (exclus. syn. Martens spitzb.)

Ranunculus sulphureus, ''Soland. in Phipps' voy, p.'' 202, (fide speciminis unici biflori absque foliis radicalibus, in Herb. Banks). ''De Cand. syst. nat. p.'' 274 (exclus. syn. Martens spitzb., Laxmanni, Willdenovii et Smithii). ''Br. spitzb. pl. in Bcoreshys arct. reg. 1, append, p.'' 75. (Antè, p. 181) ''Richardson in Franklin's journ. p.'' 742.

γ. folia radicalia basi subcuneata v. transversa alte lobata, lobo medio cuneato-obovato basi angustiorc.

Obs. Varietas γ, cujus exemplaria duo tantum à nobis visa proxime accedit α quae, in Insula Melville baud observata, sequentibus notis distinguenda.

α. folia radicalia reniformia alte lobata, lobo medio cuneato- obovato basi angustiore.

Ranunculus nivalis, ''De Cand.syst. nat. 1, p.'' 273, exclus. cit. ad ''Sw. in act. holm. 1789, p.'' 47, quæ R. pygmgæus, et syn. Martens spitzb. ad var. β pertinente.

A R. nivali differt R. frigidus Willden. foliis radicalibus minus alte incisis lobulis pluribus, petalis obcordatis venis anastomozantibus, quæ in R. nivali distinctæ, et statura paulo majore.