188 • ROSACE.E. [Potcntilla. 



majoriim Eequantibus, stipulis subindivisis. — Lvin, Mant 1. p, 76. Jacq. Hort Find. v. 2. 

 L 189. Mich. Am. v. I. p. 304. Fursh, Fl. Am. v. I. p. 356. NestL Monogr. Pot p. 36. 

 (excl. syn. Mcench.) Lehm. Monogr. Pot. p. 55. Torrey, FL of Un. St v. 1. p. 499. Rich, 

 in FrankL Istjoum. ed. 2. App. p. 20. De Cand. Prodr. v. 2. p, 581, (excl syii. P. argutcB.) 

 — fi. strigosa; foliolis subpectinato-pinnatiiidis, laciniis margine revolutis, stipulis laciniatis. 

 Pursh^ I c. Lehm. Monogr. Pot p. 55. — P. pectinata. Fisch. (sec. exempl. ab ipso auctore 

 commimicatum.) — P. absinthiifolia. Douglas^ MSS. apud Herb. Hort Soc. Lond. 



Hab. About the Saskatohawan, and as far north as the Bear Lake, and from Hudson's Bay to the Rocky 

 Mountains. Dr. Richardson, Drummond, Douglas. Kotzebue's Sound. Lay and Collie.~~The second 

 variety seems to he the more common and the North American specimens agree perfectly with those 

 from Siberia. Less general is the original form of a., such as is delineated in the above-mentioned work of 

 Jacquin, but the transitions between these tSvo forms are as frequent as /3., so that a. and /3. may be 

 esteemed the two extremes. Besides these, there occurs, though but rarely, another variety, or rather, 

 more vigorous state of the plant, where the incisions of the leaflets have no entire margin, but appear here 

 and there incised. Lastly, there exists another form, which, in regard to the leaves, holds an intermediate 

 rank between our var. /3. and the P. multijida, but whose straight erect stem, peculiar pubescence, inflores- 

 cence, &c. unite it ^^ ith P. Pennsylvamca.—U this species gi'ows in a sterile dry soil, the leaves are not in- 

 terruptedly pinnated. Thus, this separation of the lesser leaflets, which, in reality, are the inferior serratures 

 of the larger leaflets, only takes place in consequence of a more vigorous growth. (ZeAwi.)— [Dr. Torrey, 

 in the Ann. of Lye. of N. H. of N. York, v. 2. p. 197, joins to P. Petinsijlvanica the P. confertiflora of his 

 Flora of the Middle and Northern States, and some other Potentillas which belong to the P. argtita of Pnrsh 

 and of this work. The tomentum on the underside of the leaves often ahnost wholly disappears. H\ 



1. P. bipinnaiifida ; caule erecto, foliis pinnatis, foliolis obovatis pectinatim-pinnatifidis, 



supra sericeo-argenteis subtus niveo-tomentosis, stipulis rlioniboideis incisis, floribus corym- 



boso-confertis.— Z)ow<7/a5, MSS. apud Herb. Hort Soc. Lond.—F. arguta. Lehm. Monogr. 

 Pot p. 62. (non Pursh.) 



Hab. Plains of the Saskatchawan and Red Rivers. Dmtglas, Drnmmond.—Thh plant, though nearly 



aUied to the foregoing, is certainly a good species. Besides the above marks, the incisions of the leaflet are 



deeper, narrower, not erect as in P. Pennsylvanica, but patent; the calyces are white, tomentose, and never. 



as in P. Pennsylvanica, mixed with glandular hairs. We have cultivated both plants for many years in 



the Hambui^h Botanic Garden, and both have proved constant in their form. {Lehm.)~\Dr. Richardson 



having satisfactorily ascertained what is the true P. arguta of Pursh, I have taken the Uberty of altering 



the name which Dr. Lehmann had given to this plant, and adopting the MSS, one of Mr. Douglas. Put 



I must confess, the plant seems to me only a state of P. Pennsylvanica with unusually deeply divided or 

 pectinated leaflets. H.] 



8. P. Hippiana* {Lehm.); caule erecto, foliis pinnatis, foliolis lanceolato-oblongis, in- 

 ciso-et connivente-serratis, supra sericeis subtus incano-tomentosis nitidis, stipulis lanceolatis 

 acuminatis integerriniis, panicula subdichotoma laxa, petalis obcordatis calycem superanti- 

 bus. (Tab. LXIV.)— P. leucopliylla. Torrey in Ann. of Lye. of N. H. of N. York^ 

 March, 1827. p. 197. (non Pallas it 3. p. 194.)— P. dealbata. Douglas, MSS. apud Herb. 

 Hort Soc. Lond. (non Lpdph.\ 



* " Hippianam cognominare liceat banc sturem,"— says Dr. Lehmann, in his ' Stirpium primum descriptarum 

 ugillus secundus,'— « in honorera ejus viri, cui hunc Ubellura dedicavi ; summo autem jure id tribui videtur wo cum 



Utteranim cujusvis generis peritissimo, turn de juvenibus nature indaffandie studio incendendis optime merito et ad- 

 huc merente." . . 



