38 RANUNCULACE^. Thalictrum. 



tate, when old inflated, longer than the style ; lea-\-es triternate ; leaflets 

 suborbicular, crenately lobed, glabrous, glaucous beneath.— floo/c. fi. Bor- 

 Am. l.p.2; DC. 1. syst.! p. 171; Deless. ic. 1. t. 6. 



Sandhills of Portage La Loche, lat. SC, Dr. Eichardson ; Canada? 

 Mkkaux. (v. s. in herb. mus. Paris.)— Plant. l-U loot high. Leaflets as large 

 as in T. dioicum. Panicle few-flowered, loose ; pedicels long. Flowers 

 erect. Stamens foAV, as long as the sepals. Filaments conspicuously dilated. 

 Ovaries 8-10 (//«o/f.) (5-6, DC.) ovate gibbous; the persistent style ^ the 

 leno-th of the ovary. Hook. This plant was described by De Candolle Irom 

 specimens in the herbarium of Michaux. The locaUty is not recorded, nei- 

 ther is the plant described in Michaux's Flora. Hooker asks whether it 

 may not be a state of T. dioicum ; but that species has remarkably slender and 

 scarcely dilated filaments, and linear mucronate anthers. 



2. T.JiUpes: polygamous (?) : carpels semi-obovate, compressed, striate, 

 each on a slender stipe, nearly its own length, acute ; style none ; leaves 

 biternate ; petiolate ; leaflets roundisli, obtusely 3-5-lobed, ^laucous beneath. 



Linville, North Carolina, Mr. Chirtis !—V\d.i\i 2 feet or more in height, 

 very smooth. Leaves thin, on petioles an inch long, exstipellate. Panicle 

 corymbose, loose and capillary. Flowers not seen. Carpels 4-6, widely 

 spreading, membranaceous, marked Avith several prominent branching veins, 

 acute, and tipped with a minute stigma, but not rostrate ; the base tapering 

 into a long almost capillary stipe. Seed much smaller than the cavity.— This 

 species, the flowers of which we have not seen, is nearly related to T. clava- 

 tum ; but differs in the veined carpels, the entire absence of the style, and the 

 long slender stipe. 



** Carpels ovate or oblong, ribbed, sessile or slighily stipilatc : sepals caihicous. 



• '" 3. T. dioicum (Linn.): very glabrous, dioecious or polygamous ; filaments 

 "' filiform ; anthers linear, elongated, mucronate ; leaves on short petioles, ter- 

 nately decompound ; leaflets rounded, crenately and obtusely lobed, glaucous 

 beneath ; peduncles as long as the leaves ; carpels oblong, sessile, strongly 

 ribbed twice the length of the slender curved style.— />C.^ro(?r. 1. p. 12 ; 

 Pursll ! f. 2. p. 3SS; Hook. ! fl. Bor.-Am. 1. p. 3. T. tevigatum, Mich.r.! 

 fl. 1. p. '222. T. purpurascens ! (excl. syn.), rugosura, 6c Carohnianum, 

 'DC. I.e. . . 



/? 7 stipitatnm. : carpels conspicuously stipitate. 



Rockv woods, Mackenzie's River, lat. 67=', to the mountains of S. CaroUna I 

 and west to Oregon ! P. Table Mountain, N. Carohna, Mr. Curtis ! April- 

 May .—Stem 1-2 feet high. Common petioles an inch or mor- in length. 

 Leaflets about three-fourths of an inch in diameter, commonly somewhat 3- 

 lobed ; the lobes crenate-toothed. Panicles loose, 15-20-flowered. Sepals 4- 

 5 oval, obtuse, often purple. Filaments much longer than the sepals, alniost 

 capillary and nearly of the same thickness throughout ; anthers yellowish. 

 Fertile flowers with 6-8 stamens. Ovaries 6-10.— The variety k we have 

 only seen in fruit. The stipes are more than half the length of the strongly- 

 ribbed carpels ; and the persistent style is as long as the stipe. In other 

 respects the resemblance to T. dioicum is very striking.— T. purpurascens, 

 DC. is referred to this species; but we are not certain that his plant is the 

 same as that of Linnaeus. 



/' 4. T. CornuH (Linn.) : dicEcious or polygamous ; filaments su-^clavate ; 

 anthers oblong, obtuse; leaves sessile (the petiole divided to the bise), ter- 

 nately decompound ; leaflets round ish-obovate or elliptical, 3-lobed, whh the 

 lobes rather acute, glaucous or pubescent beneath ; peduncles longer than 

 the leaves ; carpels subsessile, ribbed, twice as long as the style ; stigma 

 linear.— Linn. sp. p. 768 ; Pursh ! fl. 2. p. 388 ; Hook. ! fl. Bor.-Am. 1. p. 



