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Show 84 [ 174 J l ll No rth fork of the Plutte uflordcd some of tho heHt p1unl in the collection. The 1oute a ong te · . ~ . . . Th · :r.t· Null occurred in many ph1ce", qutte to the :Sweet Water ; ltppta (z.ctpama) o S:rl'l.lCt·C IO( 'fr Oj)'Jo· laJ·, cs'· .l,l hnts onlylmownbcforc fromDr . .lnmcs, scollecti.O n :) cucocarpuspar-cu. 1UIJO w orr. m ,Llll l> ' ·, • :r.t· , , tt . e 1 • 1 ·orrcmttm ]Uir!'i l'tJlium, om\ cr£,\pilosum, Null .; shephcrdta ar~enlca, Nutt., VIJU IUS, nU · 1 ..., J' • • . 1 · F 1 1· 1 • 11 11 cw ,_ 11 cdcs ( nt•ar thl' Rt•d Butte!', ) were iound Ill lhts purl of the nt trtrantttm '?'('lnOI 1 , • ·, • • b I 1 · . 0 ·1· 0 11 the lJt>t>cr Phtt1• near the mouth of the • wccl '~'at r, wrrr collect.cd JOurnry. n "a me" 1 "• • , . I · l t' C'tt, Ol'lll!IAC 1.. ;v one of which was first d\gcovered hy Dr . .I ames, Ill Long'd severo 1n ere~> 10~ •. ' ., . . . I . · ·' tlthou"'h il waH considered aH ., new grnus, L dill not dr,.enbc 1t, ow10g to the want cxpe( tt1on ; tl.llu < o • . . • . of the ripe fruit. It is the plant douhtl'ully referred hy Hooker, tn htb I• lnr: Bon·alr Amemana, to Balis. He had 13 ccu thr male !lower:~ ouly. AH it is certainly a ucw genus, [ h :1v drllicall•d it to the excellent commander of tho expedition. a'> ll wt'll·m ritl·tl colllplimcnt for ihc R<>rvici'H lw has rendrrcu North A mcrican bot an . 'fhc ::>weet W utcr valley j.., a tHIIlll)' plain, ohout onl' hundn11l uncl tw<·nly unlr-; long, ond gen- ~rally about tive milcH broad ; bounded h) rnngr-; of ~rnnitic mountains, hl·twc~n wluch the valley formation conRiRts, ncar the Devil'::; gate, of a ~nl) i!;h mieucrous sanc\Rionr, w1th marl and while .clay. At the enn 1 mpmc,, 1 t of A ugut'l 5th-6th, there o<·curreJ a tint· w hitr ar~illacc~us sandstone, a coarse sanustom~ or pudtling-l:ltonr, and a. white calcareous Haml>:tonl'. A ft•w nult•s lo the we;,t <If thut po:;itiou, Lieutenant ~'rcmonl rrnclwd <I point "here the ·anJ..;totw rest I'd imru diah•ly upon the gro.uitr, which, thrnrclor\\ :ml, alon~ hi,; line of route, altcmatcd \\ ith a com part mira slate. Along the l-iweet Water, mnny intcrf':>ling plunt" were rollectcd, a<; may lu.• Hr<'ll by an c>.aminn· tion ofthe catalogu ; I woulcl, however, mentiOn the c11rious Cf'IWlhun Nnttnllii, Torr. and Gr.; f':tl 1 ·otia lun(![£!, M<'C(J· ; ( Diotis ltUlatn, Pur,,h ,) whi<"h scl·ms to he tli..;tinct from E. reraloide · ,· Jlu:rmopsis monlrnw, N utt. ; gilic£ prdc!lellu, Dougl. ; .~cntcio sparlioidt•s, Torr. and (3r. ; a new 11 pecief:, and four or ftw• spcries of wild currants, (ribc~ irrignum, Dou~l., &c. ) Nt•fH the mouth of the Sweet \V~<tcr was ti.>und the plantago eriop!tm-a, Torr., a ~']WCll''i fin;t c\e-;crihcd in my Dr. James's Rocky Mountain PlttnL..;. On the upper part, nn<i ncar the dividing rHl~e, wcr collcctcJ 6Cveral species of caslillf'jll; TICilhlo/liJn mic,·art ilut, Nutt. ; se, cml ~mtians; thP prt>tly lilt!<' andro~ace uccidenlalis, K ult. ; wltdar;o iucrma, T orr. and (: r. ; ;md two l'lJlcdc-; of eriogonum, one of which was Ill'\\'. On the 8th of Angu,l, th ' t•xp1oring pttrty cros~-ocu tlw divitllllg ml~c or pa:.1-;, anJ lilnnd the soil of the Jlluius at the foot of tho mountain~, on the western ~;ide, to he ~mmly. J•'ro1n Laramie's fork to this point, dificrcnt specie~:~ of artl•mi~ia v.cn' thn prr\'uilin~ ami d1·tractni!4ti • plautH ; occupying the place of the grasscl:', tmd iilliu~ the atr with the o<lnr of camphor and turp ·ntinc. Along Little 8andy, a tributary of tl1c Colonulo ol' the W e"t, wen~ co1lc<"tcd a new l'(ll'('il'o of p/au'tL ( J>. digi· I'Jia,) ru1J parnas~io jimbriato. / On the morning of the lOth of ugu~:~t, the~ enltn'l''l tho 1h·lik!'; of tlw V\' mel ri\ cr mountains, a £pur of the Rocky mountainR, or northern Andec;, aw..l among whic·h thf') ..;pent about eight tln)~· n the borders of a lake, em bosomed in one of the dt'filc,_, Wl'n' colll'dl ,\ lll'dum r!wdiula, DC., ( which had been found before, south of Kotzebue's sound, o11t) hy Dr . . lame";) o'it'nt:cio hydrophi-lus, Nutt. ; Vacciniu.m uligi11usrtm; b£tultt glondulu~a., aml JJ. ~·cridcnlffli.,, JJook.; clengntiB argenleu, nnd ~Shep!tercli £ C11nadensis. 'ome of the higher pcukb o( the W iuJ river rnnuutnins rise one thoulianJ f< et al1ove the limits of perpetual snow. Lirulcnant f r{mont, ttUended hy four nf his men, at>cended one of the loftiest pcalu; on tho 15th of August. On this lw 1ound the snow t:nc twelve thousand five huntlreu feet above the level of the sea. The ve~etation of the mount.a.ins ill tn1ly alpint>, embracing a considerable number of species common to both hemispher~, a:; well 1 !-1 some that arr ptlculiar to North America. 0 f the former, Lieutenant Fremont collected pleu.m alpinwn; oxyrirt reniformis; l'eronica ulpinn; several species of salix; carex atrata; C. panicta1 'lnd, immcdintdy hl'low tl1 • line of perpetual congelation, silene acaulis, anJ polemonium cmru/eu.TTij IJ Ho,Jk. Among the alpine plants 'peculiar to the western hemisphere, there wore {'ound oreophila mvrtif,Jia, Nutt.; aquil•giu rrerulea, Torr. ; ]Jedicularis surrecta, Bcnth. ; pulmonaria ci/iol" 11lmrs ; silme Drttttwwndii, Hook. ; menzicsia empetrijormis, poterttillu gracilis, Dougl. i &ef· . . 85 [ 174 ] cral spcc1cs of pmtts,. Jrase?·a sprc:'osa II 1• . d 1 N . ' ' oo" ' Oltecatllt'On rlmfalr~om H k ' utt. ; senecto I• remontii n. "P· Ton n 1 ( . . fi ' oo · ; pttlox muscoide~ M I ' ' · ll( ' 1• ; our or liH' 0 ,tt7·s u · . '' x. ; t le la~-ot Revcn or cin-ht very m•ur th . I' , 'an vaccmmm myrtitloidu • • o c Hnow Ill!'. Low,•r dow tl . • rt.rnzca angush.fu/i(l, Vah!. . senecio fr•'mw l . ] n lc mount;un were found . t . 'd ' . ,...,u ans, Took . sulm l DC' roxtmOt c ' Torr. and Gr. ; heliantllella un ' 17 . 'l' . ' . ru; u.q, . ; macror!t,ljnclw.~ II k oo . '.,.ma, orr. and Gr· '. a nu.1 lm' o,,yn.s vz.s cl.l lijluru ' ' The expedition lcfl th<l wl·l H1 I.I· VCf lllO\lllt:n.l iS nhout the l8tl f route as that hy which it ascended except tl t 't . . \ o AuguRt, rc1urnmg hy th sam<' ' • 1n 1 conl umeJ 1ts co . 1 tho Lower Pla tte, arriving nt itR junction with tl M' . . urHC 1 troug-h tho whole lrngth of A h I tc lssouu on the 1 >~t of 0 tob s t e p anta of T.icutt•n:mt Fremont were llll\I t 'r cx. nnu. nnh. on 1 '.I , I r t'r. North America was in the prcRs ncar! II 11 " II ~ t le lnRt part of the }i'Jom of · 1 ' Y u 1 ' lli'W matter relnt ino- t ll C · m t 1at work. Dcscri pt ionR of n [. f h . " 0 ew \C .~ompoHtiC waR in erted 0 t e nrw RpCC'H'K Wei'' ll 'I . report of the expedition having been call I fi 1 ' . . . . l eces~m y onnttl•tl, owing to th d · , C( or 1Y ongt efl.<; bel oro I could fi · ;;} tJ an compansons. fhcsc ' however, •.v t'll 1' e m. . serti;-U.1 m• m. l IC nccrllll:lry analyse-; t) · which I have just alludcu. lC surccssJve numbers of the work to JOHN TORREY. NEw YonK, Jr[arclt, 1 43. |