American Species of the Genus Anemone. 237 



6. SYNDESMOiV, HoflFmg., Flora, xv, Part II. Intell. Bl. No. 4, 34 (1832). 



1. Syiidesiuon tlialictroides (L.). 



Anemone thalictroides, L. Sp. PL, -542 (1753). 



TItaUdrum anemonoides, Miclix., Fl. Bor.-Am., i, 332 (1803). 



Syndesiiion thalictroides, Hoflfmansg., Flora, xv, Part II. Intell. BL, No. iv, 34, 



1832. 

 Thalictntm Carolinianum, Walt., Fl. Car., 137 (1788) ? 

 Anemone thalictroides, var. uniflora, Pursh, Fl. Am. Sept., 387 (1814). 

 Anemone Walteri, Pursh, FL Am. Sept., 387 (1814) ? 

 Anemonella thalictroides, Spach, Hist. Veg., vii, 240 (1839). 



Low, glabrous, 10-25 cm. high, the flowering stem arising in early spring 

 from aclusterof fleshy tubers, the ternately-compound radical leaves appearing 

 later, and resembling those of Thalictruni ; leaves of the involucre similar, 

 sessile, the leaflets long-petioled ; sepals 5-10, white, longer than the stamens, 

 forming a flower 12-25 mm. broad ; flowers perfect, umbellate, immediately 

 above the involncre ; stigmas depressed truncate, sessile ; achenia terete, 

 sessile, pointed, 8-12 mm. long, ribbed and grooved. 



Distrih. In woods throughout the eastern United States, south 

 to Florida, west to Kansas, Minnesota, and Mississippi, sparingly 

 in Ontario. Not reported from the maritime provinces of Canada. 



In suggesting the generic nan)e Syndesmon, it is said by Reichen- 

 bach, the writer of the note in Flora : "Diese Gattung hat Hffmgg, 

 gebildet um sowohl Anemone wie Thalictrum formeu zu reinigen 

 die nicht in selbigen aber sehr wohl zusammen passen." 



Pursh's Anemone Walteri is based entirely on Walter's Thalic- 

 trum Carolinianum, which he never saw, and no specimen of it is 

 contained in Walter's Herbarium. From the descriptions it may 

 be this species. 



Alluding to Plukenet's figure (t. 106, f. 4), Jussieu says (Ann. 

 Mus. Hist. Xat., iii, 250 (1804): " Cette plante designee par lui 

 sous nom de Ranunculus, par Gronovius sous celui de Thalictrum, 

 reunie ensuite a V Anemone par Linnaeus conservee dans ce genre 

 par tous les autres botanistes, a ete de nouveax reportee au Thalic- 

 trum par Michaux, sous les nom de T. anemonoides, fl. Amer., i, 

 p. 322. II aura pu etre determine a ce changeraent par les involu- 

 cres conforme^s differemment, et sur-tout par les graines alongdes 

 et strides comme celles du Thalictrum; mais si d'apres les rapports 

 naturels on refuse un involucre au Thalictrum et si on I'assigne 

 comme charactfere principal de V Anemone; si de plus on suit stricte- 

 ment I'indication de Linnaeus que conserve dans ce dernier genre la 



