4 



RANUNCULACE^. [Anemone, 



distinguislied from the species already described by its much larger size, stouter habit, darker colour, its 

 narrower leaves, especially the upper ones, and the more acute and fewer lobes. The structure of the 

 Stigma is, I think, different from its congeners: it is longer than the Slj/lcy with the sides or margins 

 dilated into a brown membrane ; the upper surface minutely papillose, as in its affinities. Linnaeus seems 

 to have established this species upon the figure and description of T, Cormiti, and to have had no specimen 

 in his herbarium ; it is impossible, therefore, to say, with his very imperfect description alone to guide us, 

 what particular plant is intended by that author ; but the present seems to be what Pursh had in view for 

 T. Comttti, and it is as well to retain this as a specific name as to reduce it to a doubtful synonym, as De 

 Candolle has done. I have been aided in the other synonyms by specimens from various American Botanists, 

 and there cannot be a question that the North American Thalictra will bear to be still farther reduced. 

 T. caroliniamtm, for example, of Bosc and De CandoUe, is but a variety, with dioecious flowers, of T. 

 rugomm of Ait. and Pursh, or rather is the genuine state of that plant. Let it be remarked, that with the 

 exception of the very doubtful T. ranunculinum of Mubl. in Willd. Enum. and of that plant of dubious genus 

 T. anemonoideSj all the hitherto described species of N. American Thalictra are dicecious ; or if otherwise, 

 in all that have come under my observation, the stamens appear to be abortive. It is singular, too, that in 

 another genus, Saxifia^a, there is a species in N. America, (hereafter to be described,) which vaiies with 

 perfect and polygamous flowers, and in which some of the states have clavate filaments to the stamens. 



Tab. IL T. Comiiti, «. Fig. 1, Portion of a male plant; Jig. 2, Portion of a female; ^g. 3, Lower leaf; 

 Jig. 4, Pistil; Jig. 5, Stam^; Jig. 6, Head of pericarps; Jig. 7, Single pericarp :—Jigs. 4, 5, 6, 7, mag- 

 nified, 



5. T, anemonoides ; radice tuberosa, floribus umbellatis, foliis biternatis foliolis cordato- 

 rotundatis trilobis, floralibus oppositis vel ternis, singulo trifoliolato. — Mich. Am, v, 1, p, 

 322. Juss. in Ann. du Mus. v. 3. p. 249, t 21. / 2. De Cand. Prodr, v, 1, />. 15. — Ane- 

 mone thalictroides. Linn. Sp. PL p. 763. Pursh, FL Am. v. 2. p, 387. BigeL PL BosL 

 ed. 2. p. 223. Curtis, in Bot. Mag. t 866. 



^, Thalictrum caule unifloro, ex eodem puncto foliis quatuor simplicibus instructis. 

 Gronov, Virg. 62, [Linn.) 



r 



Habitus inter Thalictrum et Ajiemonem. Folia floralia plerumque opposita (nunc terna quatemave ver- 

 ticillata,) non simplicia, ut dicunt Linnaeus et CI. Bigelow, sed, ut bene habet De Candolle, " petiolo ab ipsa 

 basi tripartito et ideo segmentis petiolulatis, subverticillatis, ovatis, tridentatis (nunc integerrimis, H.) invo- 

 lucrum constituentibus." Sepala petaloidea, alba. Stamina pauca. Pericarpia 7-11, lineari-oblono-a 

 breviter stipitata, sulcata : Stylus vix uUus ; Stigma subsessile, capitatum. 



Hab. Canada. Linnaeus. Michaux, (/3.) Kalm : but I have never myself received specimens from any 

 of the British Possessions in North America.— A plant of doubtful genus, agreeing, however with T. tube- 

 rosum in general habit and fructification. 



■ 



3, ANEMONE. 



Involucrum 3-phylIum a flora distans, foliolis incisis. Cal^x petaloideus, 5-15 sepalus. 

 Petala nulla. DC. 



1. A. patois; molliter sericea, foliis serotinis tripartitis ternatisve, segmentis cuneatis 

 trifidis incisis, lobis lineari-Ianceolatis, involucro lineari-multifido, flore erecto, sepalis 

 5-6, aristis longis barbatis.— Zzww. Sp. PL p. 759. GtmL Siber. v. 4. p. 195. De Cand. 

 Prodr. V. 1. p. 16.— (^. ochroleuca.) Sims, in BoL Mag. t. 1994.— Clematis hirsutissima. 

 Pursh, Fl, Am. v. 2. p. 285.— Anemone ludoviciana. NutL N. Am. Fl. v. 2. p. 26. 

 A. Nuttalliana. De Cand. Prodr. v. 1. p. 17. Nutt. in Joum. of Acad, of Nat. Sc. of 



