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Flora boreali-americana or the botany of the northern parts of British America : compiled principally from the plants collected by Dr. Richardson & Mr. Drummond on the late northern expeditions, under command of Captain Sir John Franklin, R.N. To which are added (by permission of the Horticultural society of London,) those of Mr. Douglas, from north-west America, and of other naturalists / by William Jackson Hooker
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RANUNCULACE^E.

\Caltha.

8. CALTIIA.

Cal. coloratus, 5-sepalus, sepalis suborbiculatis, petaloideis. Petala 0. Stam. plurima.Ovaria 5-10. Capsalce 5-10, compressae, patentes, 1-loculares, polyspemuie.—Herbaeperennes, glaberrimce. DC.

1. C. palustris; caule erecto, foliis orbiculato-cordatis reniformibusve crenatis, lobisobtusis, sepalis 5-6 ovalibus.— Linn. — Mich. Am. v. 1. p. 324. P-ursh, FI. Am. v. 2. p. 390.Bigel. FI. Post. ed. 2. p. 221. Rich, in Frankl. 1 st Journ. ed. 2. p. 24.

Hau. Throughout Canada , in the plains; frequent. Labrador. Mr. Morrison. Columbia. Dr. Scouler.

2. C. asar folia; caule suberecto unifloro, foliis coidato-reniforinibus crenatis, sinuobtusis, sepalis 6-7 ovalibus.— De Cand. Syst. Veget. v. 1. p. 309, Prodr. v. 1. p. 45.

IIab. Unalasclika, and the Aleutian Isles. Herb. Banks. —Too near, I fear, to the C. palustris, which isavowedly a very variable plant.

3. C. hiflora; caule unifolio bifloro, foliis radicalibus petiolatis reniformibus crenatis,sinu latissimo, sepalis oblongis.— De Cand. Syst. Veget. v. 1. p. 310, Prodr. v. 1 . p. 45.

Had. Banks’ Isles, on the North-West coast of America . Menzies. —I have seen no specimens whichexactly accord with this, but it seems to me too nearly allied to the following species.

4. C. leptosepala; caule erecto pleruinque unifloro, foliis longe petiolatis cordatiscrenatis, sepalis 8-10 oblongis. (Tab. X .)— De Cand. Syst. Veget. v. 1. p. 310, Prodr. v.l.p. 45.

Radix fasciculata, e fibris numerosis, crassiusculis, longis, descendentibus. Caules palmares vel spithamwi,erecti. Folia pauca, 4-5, plerumquo omnia radicalia, cordato-rotundata, tenui-membranacea, sinu acutius-culo, margiue, apice pnecipue, obsolete crenata: Caulina nulla vel solitaria, radicalibus similia sed minora.Petioli 2-3 uncias longi, basi membranaceo-vagiuati. Flores solitarii, vel ssepissime bini in singulo caule.Sepala 8-10, elliptico-oblonga, alba, extus subraerulea, siccitate sordide-lutca, reticulatim nervosa. Staminanumerosa, pistillis longiora. Pistilla 8-10, erceta: Germen oblongum: Stylo subnullo: Stigmatc obtusorecurvo.

Hau. North-West coast of America . Menzies. Alpine swamps in the Rocky Mountains , between lat.52° and 55°. Drummond.

Tab. X . Fig. 1, 2, Caltha leptosepala:— nat. size; Jig. 3, Petal ; Jig. 4, Stamen ; Jig. 5, Pistils; jig. 6,

Single pistil:— magnified.

5. C. natans; caule prociunbente natante, foliis eordato-reniformibus crenatis, lobissubapproximatis postice obsolete crenatis antice dentatis, sepalis ovalibus, capsulis rostrorecto. DC. —“ Pall. It. ed. min. 3. p. 248.” Gmel. FI. Sib. v. 4. p. 192. t. 82.

IIab. Creeping on the surface of deep sphagnous bogs, in the woody central districts from Canada to lat.00°; rare. Dr. Richardson. Drummond. —Flowers of nearly a pure white, according to Dr. Richardson, andless than half the size of C. palustris. The specimens of this in the Herbarium are very imperfect, and Imust confess that it appears to me an obscure species; and indeed the greater number of the species of thisgenus are but imperfectly characterized.

6. C. arctica; caule repente, foliis reniformibus crenato-repandis obtusis, folliculis(12-16) imbricatis, stigmate persistente adnato apice recurvo, antheris linearibus vigintipluribus.— Prown in Parry's lsf Voy. App. p. cclxv.

 
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