iir. 



but lltt.'V art: bu widfly (JilTfit'iit tliiiL tlu'v si'i-iii L<i (Us-.frvr goin-ntr .scpuni ■ 

 tiou. As this cHii b« determined. liowwtM-. only .ifter a delniled study of 

 the nuniorous foroij,'n species, we pirtVi- to l<'nvi' tliom as thoy are for tlie 

 prPi^ent. 



* J*rrc.//i/iii/^ fro/// a hraiirliiiii^' tai(th\: i nvo iicrv of j to ■)" 

 iDicifnal bracis\ 'hivoIhccIs ofj^ to S rather small ovate hrartit ts : 

 carpel -vith ftroniinent rihs, oil-t/thes co)itiiiiioits about tJie se.it- 

 eavitv ami oite III each ril>: see^l -face ['lane. 



I. B. Americanum. Radical Icnvos liiK-ar-lanccolatc; cmi- 

 linc ones very \ari:iMc, oblong to lincai", more or less clasplnj;: 

 r:ivs unequal % t<* '- inches lon^-; pedicels short. (V'\'^. I'iR. ) 

 li. ranuHculohles of American authors, not L, 



.\laska ( f/(/// iSc Colli ey hothrork, Se/ncathtt, Miiir. elt-.); niouiitainb of 

 X. W. Territory {Hooker. Dawxou): mountains of Montana and Yrilowstone 

 Park {Coiitler. ('aiihii. SrrHnnr. Tin;;!,,. I'linii. i>te.) Fl. July and 

 August. 



This species is so variui)le in foliage tiiat varieties would seem admis^H- 

 ible. Ilesemblanee to the European li. rniiniui<'oiile.H \h yvoW shown l»y 

 low forms with rather snui 11 oblong thin leaves and <|uite prominent hraet- 

 lets; whilo more abundant in collections are the largei forms with elongated 

 linear-lanceolate rather rigid stem-leaves and smaller bractlets. In the 

 EuropeaJi species referred to, and to which our speei<;s has been heretofore 

 referred, the; oil-tubes are large and solitary, v.liile in our species thev aie 

 so numerous (about 2'>) as to be continuous about the seed-cavitv. In 

 habit there is a close resemblance to the European species. 



* * Aiiunal: iiivolnrre iio>u\ involncels of ^ very eons plcn- 

 oiis ovate /Nuerouate />raetlets : carpels -lith very slender r/bsy anj 

 no oil tubes: secii-facc son/ezv/zat concave. 



B. uoTUNOiior.irM L., with ovate perfoliate leaves, is intro- 

 diiced from Europe, and is very common in fields and cultivated 

 f^round, from New York to N. Carolina, and westward to Ar- 

 kansas and Missouri. ( Fig. 129.) 



B. I'noTRAci r.M IJnk, wliich differs from the last chietly in 

 its tuberculate fruit, has been collected on ballast groi.ncl near 

 Philadelphia by Mr. Martindale. 



40. CILlCROPHVLLrM Linn. (Jen. n. :{:.S. Annr.aU, 

 in moist ground, with ternatcly decompound lea\es, pinnatifid 

 leartets with oblong obtuse lobes, usnalU no iiuohicrc, in\olucels 

 of many bractlets, and white llosvtis. 



