174 



1. RANUNCULACE^]. 



nectariferous (Callianthemum, Myosuru.fi). Carpels 1-ovuled ; ovule pendulous, raphe 

 dorsal. Achenes dry, rarely fleshy (Knowltoniay. Stem herbaceous, erect. Leaves 

 all radical, or the cauline alternate. Flowers often involucrate. 



3. *Thalictrum. Involucre 0. Sepals 4-5, petaloid. Petals 0. Carpels more or less 

 numerous, on a narrow receptacle ; style short, deciduous, or 0. Achenes often stipitate, 

 ribbed, nerved, or winged. Herbs with perennial rootstock. Leaves 2-3-pinnatisect. 

 Flowers often nolygamous, panicled or racemose, dull green, yellow, purple, or whitish, 

 usually small. Europe, Asia, America. 



4. * Anemone. Involucre usually distant from the flower, of three whorled leaflets. Sepals 

 petaloid, 4-20. Petals 0, or represented by the outer stamens changed into stipitate glands. 

 Carpels numerous. Achenes in a head, terminated by the persistent naked or bearded style. 

 Scapigerous herbs with perennial rootstock. Leaves radical, lobed, or dissected. Flowers 

 rarely yellowish. Stamens shorter than the sepals. Extra-tropical regions. 



Section I. Pidsatilla. Outer stamens without anthers, gland-like. Achenes terminated by a 

 bearded feathery tail. 



Section II. Anemone. Stamens all fertile. Achenes terminated by a short point, not feathery. 



Section III. Ifepat.ica. Involucre close to the flower, and simulating a calyx. Achenes terminated 

 by a short style, not bearded. 



5. Knowltonia. Sepals 5, herbaceous, deciduous. Petals 5-16, without a nectariferous 

 hollow. Carpels numerous. Achenes capitate, fleshy or pulpy ; style deciduous. Herbs 

 with perennial rootstock, and the liabit of Umbelliferce. Radical leaves stiff, ternately decom- 



Thalietmm. 



Hower cut vertically 



(mag.). 



Tlinlictrum. Diagram. 



Tlialietrum flarum. 



Thalictrum, 

 Carpel entire and cut 

 vertically (rang.). 



