2 . RANUNCULACE^, [Thalictrum. 



paUidiora, laxe tomentosa. Stamina erecta, sepalis multo brevlora : Filamenta lilifomia : AnfhercB lincares, 

 flavge. PistiUa staminum lougitudine : Sti/li graciles, longi, valde sericeo-hirsuti. 



Hab. On the west side of the Rocky Mountains, near the sources of the Cohimbia. Daiff/Ias.^This 

 beautiful species of Clematis is quite unlike any hitherto described; and I am anxious it should bear the 

 name of its zealous and meritorious discoverer. In general habit it accords with De Candolle's 5th Div. of 

 « Flammulcer (including C. integrifoUa, ochroleuca, and ovata,) but in all the species of that groupe the leaves 

 are simple, whereas here they are deeply divided, almost as in Pmonia tenuifolia. The primary divisions, in- 

 deed, might rather be called pinnate than pinnatifid, but the louermost leaves, which are simply pinnatifid, 

 with much broader segments than the rest, show their true nature. In the middle and uppermost leaves, the 

 primary divisions, or pinnae, are in two opposite pairs; so close to the base of the rachis, and so much 

 larger than the rest, that, at first sight, they give the appearance of verticillate leaves. 



3. a verticillaris ; pedunculis unifloris, foliis quaternatlni verticillatis ternatis foliolis 

 cordato-acuminatis sublobatis integerrimis serratisque, petalis acutis,— Z)e Cand. Syst 

 Veget v. L p. 166. Prodr. v. 1. p. 10.— Atragene Americana. Sims, in Bot Mag. t 887. 

 Pursh, FL Am. v. 2. p, 384.. Bigel Fl, Bost ed, 2. p. 219. 



/3. foliolis obtuse serratis.— C. obliqua. Douglas, MSS. 



Foliola lateralia semper obliqua, magis rainusve obtuse serrata vel plerumqne omnino inte'^errima parce 

 pilosa. Pedunculus e basi pedunculorum vetustorum egrediens, foHis duobus stipatus. J7o/cernuuI Se- 

 pala magna, coroUma, ovato-lanceolata, acuta, caerulea vel purpurea, extus magis minusve pilosa. Petala 

 calyce duplo triplove breviora, linearia, quo interiora eo magis distincte antherifera. 



Hab. In woods in the central districts, as far north as lat. 54o, ascending the elevated vaUeys on the eastern 

 decUvity of the Rocky Mountains m that latitude. Br. Richardson. Brummond. At Cape Mendocina, on 

 the N.W, coast, in lat. 40°: plentiful. Bouglas. ~~^^.rly allied to ClemaHs {Atragene, Linn.) alpina Wt 



niTTAiminr in irc a/^iiTi^ -nA-t-olc onrl n^ flirt -fnM n*^c^l1 — J __. i» __ ^ ^ i ^ 



differin 



do"es not appear to be found farther north than lat. 54°, nor south of Pennsylvania, on the east side k"is 

 not included in EUiott's Sketch. ^ ' ^^^- " ^ 



2. THALICTRUM. 



Invohecrum sub flore nullum. Pet. nulla. Carpella sicca in caudas non desinentia, nunc 

 stipitata, nunc longUudinaliter striato-sulcata-Herba. ;,er«mes ; caulis annms ; flores 

 corymbosi-pamculatt aut suhmcemosi, herhacei, albi vel Jiavi. DC. 



1 T.clavatum; hermaphroditum, filamentis clavatis, antheris ellipticis muticis, car- 

 pelhs inflatis st.pitat.s la^vibus oblongis stylo longioribus, foliolis subrotundis crenato- 

 lobatis glabns subtus glaucis.-2). Cand. Syst. Veget. v. 1. p. 171. De Less. Ic. v. I. t. 6. 

 Be Cand. Prodr. v.l.p^W, 



Totaplanta glabra, pedalis ad sesquipedalem. Cattlis nitidus ramo«ii>. F^AVv f.*+ * rr i- ^ 



pauciflora, laxa, pedjceU.s loops. Flores erecti. Stamina pauca. brevia, perianfhii lon^udinf kL 1" 

 supeme ms.^^.ter i atata. Anther, breves, elliptic^, muti«e. Pi^tm 8-10 in A^^CL. G~ 

 ova^m, sfptotum, gzbbura. L«ve, demuoa inilat.n,, in stylo, gennine i breviore .uJZ^ur^ 



tL species of Thalictrum, wWch!rerto have bTen f " TT "'" ** ^"'" '*'" ^^ ^-*«'-*-- 



exactly accords with the figure of ^"11^1^ Zl^^^l "r ' " "• " ''"' '^ """' ^'"^"'"" *"^^"*"' 

 leaves in our nlant are ,™^1., i ''"""''""'' '° ^* ^"^^^^ s Icmies, in ever^ particular, except that the 



Born.;Te£ranTtiiT«r/rr ^^^^^^^ -'}^- ^- -^- -^ -'!^ ^^-r. 



