66 RANUNCULACEAE. {Vot. II- 
2. Hepatica acuta (Pursh) Brit- 
ton. Sharp-lobed or Heart 
Liver-leaf. (Fig. 1579.) 
Hepatica triloba var. acuta Pursh, Fl, Am. 
Sept. 391. 1814. 
Hepatica acutiloba DC. Prodr. 1: 22. 1824. 
Hepatica acuta Britton, Ann. N. Y. Acad. 
Sci. 6: 234. 1891. 
Scapes 4’-9/ high, villous. Plant closely 
resembling the preceding, differing in 
that the leaf-lobes and those of the invo- 
lucre are acute or acutish. 
In woods, Quebec and throughout Ontario, 
south in the Alleghanies to Georgia, but rare 
or absent near the Atlantic Coast, west to 
Iowa and Minnesota. Puzzling forms occur 
which are referable with about equal cer- 
tainty to the preceding species. The leaf- 
form of the German plant is quite intermedi- 
ate between our ss and acuta. A 
dioecious tendency of this species has been 
observed by Prof. Byron D. Halsted at Ames, 
Iowa. March-April. 
, As oi - 
16. SYNDESMON Hoffmg. Flora, 15: Part 2, Intell. Bl. 4, 34. 1832. 
[ANEMONELLA Spach, Hist. Veg. 7: 239. 1839.] 
A glabrous perennial herb from a cluster of tuberous-thickened roots, with basal 2-3-ter- 
nately compound leaves, those of the involucre similar but sessile, and large terminal um- 
bellate slender-pedicelled white flowers. Sepals thin, petaloid. Petals none. Stamens all 
anther-bearing. Achenes terete, deeply grooved; stigma sessile, truncate. [Greek, bound 
together, the plant uniting many of the characters of dzemone and Thalictrum. | 
A monotypic genus of eastern North America. 
1. Syndesmon thalictroides (L.) Hoffmg. Rue-Anemone. (Fig. 1580.) 
Anemone thalictroides 1,. Sp. Pl. 542. 1753- 
Thalictrum anemonoides Michx. F1. Bor. Am. 
I: 322. 1803. 
Syndesmon thalictroides Hoffmg. Flora, 15: 
Part 2, Intell. Bl. 4, 34. _ 1832. 
Anemonella thalictrotdes Spach, Hist. Veg. 7: 
240. 1839. 
Low, glabrous, 4/-9’ high, the flowering 
stem arising in early spring from the clus- 
ter of tuberous roots, the ternately-com- 
pound basal leaves appearing later and re- 
sembling those of 7halictrum. eaves of 
the involucre similar, sessile, the leaflets 
long-petioled; sepals 5-10, white or pink- 
ish, longer than the stamens; flower !4/-1’ 
broad; flowers perfect, umbellate, im- 
mediately above the involucre; stigmas de- 
pressed-truncate, sessile; achenes sessile, 
pointed, 4/’-6’” long. 
In woods throughout the eastern United 
States, west to Kansas and Minnesota, spar- 
ingly in Ontario. Not reported from the 
maritime provinces of Canada. Leaflets are 
occasionally borne on the stem below those of 
the involucre. March-June. 
17. PULSATILLA Adans. Fam. Pl. 2: 460. 1763. 
Perennial scapose herbs, with thick rootstocks, basal long-petioled digitately divided 
leaves, and large purple or white solitary flowers. Involucre remote from the flower, 3- 
leaved. Sepals petaloid. Petals none. Inner stamens anther-bearing, the outer ones often 
sterile. Achenes with long persistent plumose styles. [Latin name, unexplained. ] 
About 18 species, natives of the north temperate and subarctic zones. Besides the following, 
another occurs in northwestern North America. 
