120 PEAGTIGAL BOTANY. 



Involucre of 2 or 3 ternate, sessile leaves (apparently 

 a whorl of long-stalked simple leaves). Leaflets 3-lobed at 

 the apex. The radical leaves twice or thrice ternate, with 

 leaflets, like those of the involucre. Achenia grooved, with 

 a short style. Flowers several, white, or pale purple. 



Thalictrum anemonoides, Mx. (892). 

 (Anemone thalictroides, L.) 



Sy. Flowers all perfect. Achenia numerous in a head, 

 membranaceous, compressed, 4-angled, and inflated. Leaves 

 alternate, palmately lobed. Flowers corymbed, white. 



Trautvetteria palmata, Fischer & M. 



Flowers polygamous (or dioecious), in compound 

 panicles, greenish or white. Achenia 4—15 in a head, 

 ribbed-angled, and with a long stigma. Stem-leaves scat- 

 tered, 3 to 4 times compound; leaflets roundod, stalked, 

 either 3 or 5- to 7-lobed. Thalictrum (892). 



38. Petals none .39 



Petals present 41 



S9. Sepals 3, deciduous. Fruit a berry. Pistils 12 or 

 more, becoming a raspberry-like head of crimson acines. 

 Leaves palmately 3- to 5-lobed, one of them radical, and 2 

 near the summit of the stem. A solitary greenish-white 

 flower, terminal. Hydrastis Canadensis, L. 

 Sepals 5-9. Fruit of few or several follicles 40 



40, Sepals white, 5, deciduous. Leaves twice- to thrice- 

 ternately compound, the leaflets 2- or 3-lobed. Flowers 

 axillary and terminal. Pistils 3-6, some of them, usually 4, 

 becoming divaricate pods. 



Isopyrum bitematiun, Torr. & Gr. 



Sepals golden yellow, 6-9. Glabrous, trailing 



aquatics. Stems hollow. Leaves orbicular-kidney-shaii- 



ed, crenate or entire. Follicles 5-10. Caltha palustris, L 



41. Petals spurred, all or some of them 42 



Petals not spurred (sometimes 2 only, and the sepals 



very irregular) 43 



43. Petals all spurred and all alike. Flowers terminal, 

 scarlet without, and yellow within, pendulous, the spurs 

 pointing upward, the yellow stamens and styles exserted. 



