1379 



POTENTlLLA* argiita. 

 Close-flowered Potentilla. 



ICOSANDRIA POLYGYNIA. 



Nat. ord. Rosacea Juss. {Introduction to the natural system of 

 Botany, p. 81.) 



POTENTILLA L. — Calycis tubus concavus, limbus 4-5-fidus, extiis 

 4-5-bracteolatus. Petala 4-5. Stamina 00. Carpella 00, stylo lateral! 



donata, in receptaculo persistente exsucco capitate. Semen appensum. 



Herbae aut sufFrutices, ibliis compositis, siiTpuVis petiolo adnatis, floribus albis, 

 luteis, rariter rubris. — Dec. prodr. 2. 571. 



P. arguta ; viscosa hirsutissima, caule erecto subsimplici, foliis subin- 

 terrupte pinnatis ; foliolis rotundato - ovatis duplicat6 inciso-dentatis 

 . obliquis, stipulis ovatis acutis integris, floribus aggregatis subsessilibus, 

 foliolis calycinis inoequalibus oblongis acutis, petalis obovatis calyce 

 longioribus. Torrey's Flora of the United States, vol. 1. p. 499, ex 

 anglica versus, sub P. confertiflora. 

 P. confertiflora. Spreng. cur. post. p. 198. 

 P. obliqua. Douglas in herb, nostr. 

 P. ferruginea. Douglas in Hort. Soc. Hort. 

 P. arguta. Pursh Fl. Am. sept. 2. 736. 

 P. pennsylvanica /3. Dec. prod. 2. 581. 

 Boottia sylvestris. Bigelow's plants of Boston. 



Radix perennis, crassa. Herba tota viscosa, pube subferrugined vestita. 

 Folia radicalia plurima, erecta, pinnata, aliquando paulh interrupta, sub 

 5-juga cum impari cequali ; foliola subrotundo-ovata, inciso-serrata, basi sub- 

 obliqua, inferioribus multb minoribus. Caulis erectus, parum ramosus, pedalis 

 V. bipedalis, foliorum foliolis magis elongatis minHs interruptis, stipulis 

 integris v. apice dentatis. Flores racemis densis subcapitatis aggregati. 

 Calyx campanulatus, laciniis interioribus ovato-oblongis muc'ronulatis, ex- 

 terioribus linearibus. Petala pallide fiava, obovata, calyce paulb longiora. 

 Stamina 20, disco pentagono carnoso inserta. Styli plurimi, carnosi, ab 

 ovario citb decidua. Achenia sicca in receptaculo exsucco. 



A native of North America. Dr. Torrey speaks of it as 

 not uncommon on rocky hills and banks. Mr. Douglas 



* So named, as it is said, in reference to the potential qualities ascribed 

 to some species. 



