78 FOUNDATIONS OF BOTANY 



(e) Sepals 5, white. Flowers axillary and terminal. Pods 

 2-several-seeded. Isopyrum, III. 



(/) Sepals white or colored. Plants not climbing. Akenes 

 more or less tailed with the styles in fruit. 



Anemone, IX. 



(g) Sepals 5-10, white. Flowers in an umbel. Roots 

 tuberous. Anemonella, XI. 



I. PiEONIA, L. 



Perennial ; from thick, fleshy roots ; stems shrubby or her- 

 baceous. Leaves much divided. Flowers terminal, large and 

 showy. Sepals 5, leaf-like and persistent. Petals 5 or more. 

 Pistils 3-5 ; ovaries surrounded by a disk.* 



1. P. officinalis, L. Garden P^eony. Herbaceous; flowering 

 stems 1-2 ft. high. Leaves ample ; leaflets lance-ovate, cut or 

 incised, smooth. Flowers double, white or red. Follicles 2, erect, 

 many-seeded. Common in gardens.* 



II. CALTHA, L. 



Smooth perennials with large, roundish leaves. Sepals 

 petal-like, 5-9. Petals none. Pistils 5-10, each consisting 

 of a 1-celled ovary with a nearly sessile stigma. Fruit a 

 many-seeded follicle. 



1. C. palustris. Marsh Marigold, Cowslips, Meadow Butter- 

 cup (both the latter unsuitable names, but in common use). Stem 

 hollow, smooth, ascending ; leaves smooth, roundish and heart- 

 shaped, or kidney-shaped, with crenate, dentate, or nearly entire 

 margins ; the broad oval sepals bright yellow. Swamps or wet 

 ground. 



III. ISOPYRUM, L. 



Small, smooth herbs. Leaves 2-3 times compound, in 

 threes ; the leaflets 2-3-lobed. Flowers peduncled, white. 

 Sepals 5, petal-like, soon falling. Petals wanting (in our 

 species). Stamens 10-40. Pistils 3-6 or more. 



1. I. biternatum, Torr. and Gr. A delicate, erect plant, with alter- 

 nate branches, looking much like Anemonella, with clustered stems 

 from perennial tuberous roots. Damp woods. 



