Tab. 5483. 

 BARTONIA nuda. 



Bractless Bartonia. 



Nat. Ord. Loase^. — Icosandria Monogynia. 



Gen. Char. Calyx tabo cylindrieo, cum ovario connato, limbi superi qtiinque- 

 partiti lobis asqualibus. Corolla petala 10, summo calycis tubo inserta, plana, 

 sequalia v. alterna, limbi lobis opposita, ahgustiora, apice antherifera. Stamina 

 plurima, cum petalis inserta; filamenta filiformia, libera, anthem biloculares, 

 longitudinaliter debiscentes. Ovarium inferum, uniloculare, placentis parietali- 

 bus tribus v. septem, nerviformibus. Omda plurima, anatropa. Stylus simplex ; 

 stigma obtusum. Capsula cylindrica, calycis limbo coronata, unilocularis, vertice 

 breviter exserto, tri-septem-valvis, valvis cum placentis nerviformibus alternanti- 

 bus. Semina plurima, complanata, alata. — Herbae boreali- Americana, pilis rigidis 

 larbatce conspersce, erecta ; foliis alternis, sessilibus, v. inciso-pinnatifidis ; flori- 

 bus terminalibus, solitariis, amplis, albis. Endl. 



Bartonia nuda ; tota planta (petalis staminibus styloque exceptis) pilis minutis 

 barbigeris aspera, caule erecto ramisque albis, foliis sessilibus lanceolatis 

 bbtusis pinnatifido-dentatis, floribus in ramulis terminalibus amplis pallide 

 sulfureis decapetalis subebracteati3, calycis tubo infundibuliformi, limbo 

 laciniis elongatis acuminatis reflexis, staminibus numerosis, filamentis non 

 raro sterilibus petaloideis, stylo trifido, " capsula 3-valvi, seminibus nu- 

 merosis alatis." 



Bartonia nuda. Nutt. Gen. Am. v. 1. p. 297. Pursh, Fl. Am. Sept. v. I. p. 

 328 et 2. p. 749. Be Cand. Prod. v. 3. p. 339. 



Mentzelia nuda. Torr. et Gr. Fl. N. Am. v. 1. p. 535. 



We are glad to give a figure of this very rare plant, for a fine 

 specimen of which we are indebted to Mr. Thompson, of Ips- 

 wich, who has recently introduced it to our gardens from the 

 Missouri, where alone it appears to be found, and where it was 

 discovered, and has been well described, by Nuttall. But, how- 

 ever handsome it looks on paper, Mr. Thompson, who has the 

 credit of obtaining it for our gardens, candidly acknowledges 

 that " it cannot be looked upon as a hardy ornamental plant ; 

 the flowering only takes place late in the evening, and at a sea- 

 son, October, when it is too late for the ripening of the seeds." 



DECEMBER 1ST, 1864. 



