11. Caltha. Petals none. Sepals broad, yellow. Leaves kidney-shaped, undivided. 12. Trollius. Petals 5--20, narrow, pitted above the base. Pods sessile. Leaves palmately lobed. 13. Coptis. Petals 5--6, small, hollowed at apex, white. Pods long-stalked. Leaves radical, trifoliolate. 14. Helleborus. Petals small, tubular, 2-lipped. Sepals 5, broad, persistent and turning green. Pods sessile. 15. Eranthis. Petals small 2-lipped nectaries. Sepals 5--8, narrow, deciduous. Flower solitary, involucrate. [+][+] Sepals and large spur-shaped petals regular, each 5. 16. Aquilegia. Pistils 5, with slender styles. Leaves ternately compound. [+][+][+] Flowers unsymmetrical and irregular. Sepals 5. 17. Delphinium. Upper sepal spurred. Petals 4, of two forms; the upper pair with long spurs, enclosed in the spur of the calyx. 18. Aconitum. Upper sepal hooded, covering the two long-clawed small petals. [+][+][+][+] Flowers regular, racemose. Sepals caducous. Petals very small, stamen-like, or none. Leaves decompound. 19. Cimicifuga. Flowers in long often paniculate racemes. Pistils 1--8, becoming many-seeded pods. 20. Actæa. Flowers in a single short raceme. Pistil single, forming a many-seeded berry. [*][*] Ovules a single pair. Flowers regular. Roots yellow and bitter. 21. Hydrastis. Flowers solitary. Sepals 3, petal-like, caducous. Petals none. Stamens numerous. Pistils several, becoming 2-seeded berries. Leaves simple, lobed. 22. Xanthorrhiza. Flowers in compound racemes. Sepals 5. Petals 5, small, 2-lobed, with claws. Stamens 5--10. Pods 1-seeded. Shrub with pinnate leaves. 1. CLÉMATIS, L. VIRGIN'S-BOWER. Sepals 4, or rarely more, colored, the valvate margins turned inward in the bud. Petals none or small. Achenes numerous in a head, bearing the persistent styles as naked, hairy, or plumose tails.--Perennial herbs or vines, mostly a little woody, and climbing by the bending or clasping of the leaf-stalks, rarely low and erect. Leaves opposite. (Κληματίς, a name of Dioscorides for a climbing plant with long and lithe branches.) § 1. FLÁMMULA. _Flowers cymose-paniculate, rather small, in our species diœcious. Sepals petaloid, whitish, spreading, thin. Petals none. Anthers short, blunt._ 1. C. Virginiàna, L. (COMMON VIRGIN'S-BOWER.) Smooth; leaves bearing 3 ovate acute leaflets, which are cut or lobed, and somewhat heart-shaped at the base; tails of the fruit plumose.--River-banks, etc., common; climbing over shrubs. July, August. 2. C. ligusticifòlia, Nutt. Very similar, but the leaves 5-foliolate or quinate-ternate.--Long Pine, Neb., and west to the Pacific. § 2. VIÓRNA. _Flowers large, solitary on long peduncles, usually nodding. Sepals thick, erect and connivent at base, mostly dull purple. Petals none. Anthers linear._ [+] _Stems climbing; leaves pinnate; calyx (and foliage) glabrous or puberulent._