RANUNCULACE.fi. (CROWFOOT FAMILY.) 9 



9. CALTHA, L. Marsh Marigold 



Sepals 4-10, regular, flat, colored, imbricated in the bud, deciduous. Petals 

 none. Stamens numerous; filaments filiform. Ovaries 5-15, many-ovule d. 

 Stigma sessile. Follicles capitate or whorled, sessile, spreading, many-seeded. — 

 Perennial, smooth herbs, with cordate or reniform undivided leaves, and showy 

 yellow flowers. 



l. C. palustris, L. var. parnassifolia, Torr. $• Gr. Stem l -leaved, 

 1 -flowered ; radical leaves long-petioled, broadly reniform, sharply toothed ; se- 

 pals oblong. (C. ficarioides, Pursh.) — Cedar swamps, South Carolina (Pursh), 

 Tennessee, and northward. 



10. ISOPYRTJM, L. 



Sepals 5- 6, regular, ovate, colored, imbricated in the bud, deciduous. Petals 

 5 and minute, or none. Stamens numerous. Ovaries 2 - 20. Ovules few or 

 many, in 1 -2 rows. Style short, subulate. Follicles sessile, membranaceous. 

 Seed horizontal. — Perennial, smooth herbs, with alternate compound leaves, 

 and solitary white flowers. 



1. I. biternatum, Torr. & Gr. Stem (6' -12' high) slender, sparingly 

 branched ; radical leaves biternate, on long petioles ; stem-leaves ternate, nearly 

 sessile ; leaflets ovate and obovatc, obtusely 3-lobed ; petals none ; ovaries 1 - 5 ; 

 follicle 2-seeded. (Encmion biternatum, Raj'.) — Shady woods, West Florida 

 and westward. April. — Root commonly bearing small tubers. The plant re- 

 sembles Thalictrum anemonoides in general appearance. 



11. AQTJILEGIA, L. Columbine. 



Sepals 5, regular, ovate, colored, imbricated in the bud, deciduous. Petals 5, 

 prolonged downward into hollow spurs. Stamens indefinite. Filaments filiform, 

 elongated. Ovaries 5, many-ovuled. Follicles sessile, connivent, many-seeded, 

 tipped with the elongated, filiform, persistent styles. Seeds horizontal. — Erect, 

 perennial, branching, leafy herbs, with alternate ternately-compound leaves ; 

 those of the root long-petioled. Flowers showy, nodding, solitary, or somewhat 

 corymbed. 



1. A. Canadensis, L. Stems 2° high, smooth or slightly pubescent ; 

 radical leaves biternate, stem-leaves ternate, short-petioled ; leaflets roundish or 

 obovate, crenately lobed ; flowers scarlet, yellow within ; stamens and styles 

 exserted. — Rocky woods, "West Florida and northward in the upper districts. 

 April and May. 



12. DELPHINIUM, L. Larkspur. 



Sepals 5, irregular, colored, imbricated in the bud, deciduous ; the outermost 

 larger, and produced backward into a hollow spur ; the others flat. Petals 4, 

 dissimilar ; the two upper with spurs which are received in the spur of the sepal, 

 the two lower stalked ; sometimes (as in the annual Larkspur) all united. 

 Stamens numerous, included ; filaments subulate. Ovaries 1-5, 1-celled, many- 



