1440 



PURSHIA* tridentcita. 

 Th ree-toot/ied Purshia. 



ICOSANDRIA MONO.DIGYNIA. 



Nat. or d. Rosace/^ Jtiss. § Spiroeacese De Cand. — {Introduction to 

 the natural system of Botany, p. 83.) 



PURSHIA De Cand.— C«^. 5-fidus, lobisovatis obtusis. Pet. 5, orbi- 

 culata, et stam. circitcr 20 c calyce exserta. Carpella 1-2, ovato-oblonga, 

 in stylum breveni attenuala, pubcscentia, ovulo 1 basi inserto foeta, dcmiim 



rima longitudinali dehiscentia. -Frutex i-amosissimus, gcmmis s(ftn7nosis, 



foliis confcrtis cuncatis apicc grossc 2-3-dentatis supra villosis suhttis cano- 

 tomentosis, stipulis aut minimis, floribus luteis. — Dc Cand. prodr. 2. 541. 



P. tridentata. De Cand. in trans. Linn. soc. 12. p. 157. Prodr. 2. 541. 



Hooker Ji. boreali americana. 

 Tigarca tridentata. Purshji. bar. am. 1. p. 33. t. 15. 



Frutex, in hortis dumosus, 2-pedalis, ramis teretibus, brevibus, rigidis, 

 epidermidc divellicante. FoVm fasciculata, cuneata, glauca,apice tridentata, 

 c gemmis squamaceis erianpentia, supra pttbcscentia, subtiis canotomentosa ; 

 stipuloG minimce, scepius obsolctce. Flores soliiarii, in medio fasciculornm 

 terminales, foliis brcviores. Calyx infundibular is, tomentosus, ft-dentatus, 

 dentibus obtusis, patcntibus. Petala 5, linear i-obovata, pallidc luteo-viridia, 

 incurva. Stamina indefnita, equalia, seric simplici inserta in faucc. Car- 

 pella solitaria v. gemina, tomentosa, simplicissima, ovulis binis v. solitariis, 

 ascendentibus. Stylus terminalis, continuus. Stigma simplicissimum. 



A native of the north-west coast of America, about the 

 river Columbia, where it was found by Lewis and Clarke's 

 party. Pursh subsequently described it from dried speci- 

 mens ; but referred it to a genus of a totally diti'crent 

 natural order from that to which it really belongs. M. 

 De CandoUe first pointed out the mistake, with his cus- 



* Named by the learned M. De CandoUe alter Mr. Frederick Pursh, a 

 meritorious Prussian Botanist, who pubbshed a well-known Flora of North 

 America, in London, in 1814. He died some years since in America: his 

 Herbarium now forms part of the vast collection of his fiien<l and patron 

 Mr. Lambert. 



