436 RANUNCULACEAE 
divided into acute serrate lobes: scapes 5-10 dm. high, stout, branching at the involucre, 
the lateral peduncles bearing secondary involucres: bracts of both primary and secondary 
involucres similar to the leaves, with petioles 2.5-5 cm. long: sepals generally 5, white or 
greenish, acute or obtuse: calyx 18-30 mm. broad: head of fruit oblong, 18-25 mm. long, 
mostly over 1 cm. thick : achenes compressed, woolly, each tipped with the subulate style. 
In woods or thickets, Nova Scotia to Kansas, Manitoba and the Canadian Rocky Mountains to 
middle Georgia. Summer. 
4. Anemone riparia Fernald. Foliage glabrate or loosely pubescent, or silky above. 
Leaves several; blades thin, 3-divided, the divisions lanceolate to ovate, acuminate at 
the base, coarsely and sharply toothed, the lateral divisions deeply cleft dn the lower side: 
scapes 3-9 dm. tall: bracts of the involucre 3, quite similar to the leaves, subtending 1-5 
peduncles: sepals thin, white, unequal, oval or obovate, 1.5-2 cm. long, obtuse or rather 
acute: head of fruit short-cylindric, 1.5-2 cm. long, barely 1 cm. thick : achenes with 
appressed or ascending styles. 
In rocky soil or on steep banks, New Brunswick to Quebec and along the mountains to North 
Carolina and Tennessee. Summer. 
5. Anemone quinquefólia L. Foliage nearly glabrous. Leaves basal; blades 
5-divided, 4-11 em. broad, appearing later than the scapes, the divisions oblong or ovate, 
more or less cuneate at the base: scapes erect, 1-2.5 dm. tall, slender, simple: bracts of 
the involucre 3, slender-petioled, 3-5-parted, the segments 1.5-3 cm. long, acute, lobed or 
incised : flower solitary, 2-2.5 cm. broad : sepals 4-9, white, or purplish without: head of 
fruit globose, inclined : achenes oblong, 4-5 mm. long, pubescent, the styles hooked. [A. 
nemorosa Michx., not L.] 
In low woods, Nova Scotia to the Rocky Mountains, middle Georgia and Alabama. Spring. 
6. Anemone trifdlia L. Foliage nearly glabrous throughout. Leaves basal; blades 
mostly 3-divided (sometimes 4—-5-divided), long-petioled, dentate, often somewhat lobed : 
scapes erect, relatively stout, 1-4 dm. tall: involucral bracts 3, stout; blades petioled, 
3-parted, the divisions oblong-lanceolate, acute or acuminate at the apex, dentate, often 
coarsely so, 2.5-7.5 cm. long: flower solitary, white, 2.5-4 em. broad when expanded: 
pedicel 2.5 10 cm. long: sepals oblong: head of fruit globose, 10-12 mm. in diameter: 
achenes 10-20, oblong, finely pubescent, each tipped with the hooked style. 
In woods. southern Pennsylvania to Virginia and Georgia, chiefly in the mountains. Also 
in south-central Europe. Spring. 
14. SYNDESMON Hoffmg. 
Perennial herbs, the slender scapes from a cluster of tuberous-thickened roots. Leaves 
basal: blades 2-3-ternately compound. Bracts of the involucre similar to the leaves 
but sessile. Flowers large, terminal, umbellate, slender-pedicelled. Sepals white, thin, 
petal-like. Petals wanting. Stamens all anther-bearing. Stigma sessile, truncate. Achenes 
plump, deeply grooved. [Anemonella Spach. ] 
1. Syndesmon thalictroides (L.) Hoffmg. Foliage glabrous. Scapes arising in 
early spring from the cluster of tuberous roots, 1-2.5 dm. high: leaves basal, appearing 
and resembling those of Thalictrum ; blades ternately-compound : bracts of the involucre 
similar to the leaf-blades, sessile; leaflets long-stalked : flowers 1-2.5 em. broad, perfect, 
umbellate, immediately above the involucre : sepals 5-10, white or pinkish, longer than the 
stamens: stigmas depressed-truncate, sessile: achenes sessile, pointed, 8-12 mm. long. 
[Anemonella thalictroides | L.) Spach. ] 
In woods, Ontario and nearly throughout the eastern United States, westward to Kansas and Min- 
nesota. Spring. RUE ANEMONE. WIND RUE. : 
15. CLEMATIS L. 
Vines, usually climbing over shrubs. Leaves opposite : blades 3-several-foliolate, 
the leaflets entire, toothed or incised. Flowers several or many in broad paniculate cymes, 
dioecious or polygamo-dioecious. Sepals relatively small but petaloid, without a border, 
thin, white or pale, spreading. Petals wanting. Stamens spreading: anthers short and 
blunt. Pistils several. | Achenes 1-seeded, with silky or plumose styles. 
Leaflets less than 4 em. long : styles 5-10 em. long at maturity. 1. C. Drummondit. 
Leaflets over 5 em. Jong : styles 2.5-4 em. long at maturity. P 
Leaf-blades mainly 3. foliolate. 2. C. Virginiana. 
Leaf-blades mainly twice ternately compound. 3. C. Catesbyana. 
1 Clematis Drumméndii T. & G. A climbing or straggling vine, with cinereous- 
pubescent foliage. Leaves numerous; blades mainly pinnately 5-7-foliolate ; leaflets 
