58 



EANUNCULACE^. 



is often entirely dissipated in the process of drying. Occasionally, as in 

 aconite, the active principle is stored up more abundantly and permanently 

 in a tuberous root. 



Though the ranunculacese are represented in the United States by a 

 comparatively large number of genera and species, few of these have as yet 

 been found worthy a place in the Pharmacopoeia. Doubtless further care- 

 ful investigation in this field may yield important results. 



CLEMATIS. — Vebgik's-Bower. 



Character of the Genus. — Calyx : sej)als 4, rarely more, colored, petaloid, 

 the valvate margins turned inward in the bud. Corolla none, or, if 

 present, the petals small. Stamens indefinite in number, distinct. Ova- 

 ries numerous, distinct. Achenia in a head bearing the persistent styles 

 as naked, hairy, or plumose taUs. 



Perennial, herbaceous or slightly woody plants, generally climbing by 

 means of their leaf-stalks ; occasionally low and erect. Leaves opposite. 

 Clematis Viorna Linne. — Leather-Flower. 



Description. — Calyx ovate, at length bell-shaped, the purplish sepals 

 very thick and leathery, tipped with 

 short recurved points. Corolla wanting. 

 The long tails of the fruit very plumose. 

 An herbaceous chmber. Leaves 

 pinnate ; leaflets 3 to 7, ovate or oblong, 

 sometimes slightly cordate, 2- to 3-lobed 

 or entire ; the uppermost often simple. 

 Peduncles bearing single, large, nod- 

 ding flowers, which apjDear from May to 

 August. 



Habitat. — In rich soil fi'om Pennsyl- 

 vania to Ohio and southward. 



Clematis Virginiana Linne. — Com- 

 vion Virgin' s-Boioer. 



Description. — Flowers polygamo-di- 



cecious. Calyx: sepals small, obovate 



sj^reading, white. Corolla wanting. Fruit 



with conspicuous feathery tails. An her- 



FiG. 96.-ciematis Virginiana. baceous perennial, stem chmbing and 



running freely over shrubs, fences, etc. Leaves ternate ; leaflets ovate, 



acute, cut or lobed, somewhat cordate at the base. Flowers in axillary 



panicled clusters, appearing in August. 



Habitat. — On the alluvial banks of streams and along fences ; common 

 from Canada to Florida. 



