Order I. RANUNCULACE^ Endl Gen. 843. , , 



Sepals 3-6 or more but usually 5, distinct, hyppgynous, often 

 colored and petaloid. Petals 1-several or none, hypogynous. 

 Stamens indefinite in number, hypogynous, distinct. Ovaries 

 usually numerous, sometimes few or solitary, distinct: ovules 

 solitary or several. Fruit achenes or follicles or baccate. Seeds 

 anatropous. Embryo minute, near the base of horny or fleshy 

 albumen. Herbs or rarely shrubs with colorless usually acrid 

 juice, alternate or rarely opposite leaves without stipules, the 

 baseof the petiole generally dilated and partly clasping the stem. 



Tribe i. Leaves opposite. -Sepals valvate in the bud, petaloid. 

 Petals very small or none. Fruit a head of hairy-tailed achenes. 



1 Clematis, Half- woody plaais climbing by their petioles, or erect herbs. 



Tribe 11. Sepals petaloid -or greenish, imbricateddn the bud. 

 Fruit a head or spike of achenes. 



* Achenes in a more or less globular or oblong head. . Sepals not 

 spurred at base, petaloid. Petals none. 



2 Anemone, Sept^ls indefinite in uumbei-. leayes on the stem opposite, 

 or whorled on or b^ow 1-flowered pedvmcles. 



3 Thalictrnm' Flowers mostly dioecious, panicled : leaves alternate, 

 ternately decompound. 



* * Achenes numerous,. in along fnd slender, or' shcrt spike. Sepals 

 "spurred at base. Petals present. 



4 Myosurus. Petals slender; flowers, solitary on scapes. 



Tribe hi. Sepals imbricate in the bud. Pistils numerous, be- 

 coming achenes. Ovule, solitary, ascending.. Leaves alternate. 



5 Trantvetteria. Flowers perfect, corymbosely panicled; sepals petal- 



oid, soon deciduous; leaves alternate, palmately cleft. .-. 



6 Batrachium. Flowers perfect: peduncles solitarj', opposite the leaves: 

 petals white with a naked nectariferous pit near the base: achenes trans- 

 versely wrinkled on the sides. 



I Bannncnlns, Flowers perfect: peduncles axillary or terminal: petals 

 mostly yellow, with a nectariferous spot or pit covered by a scale on the 

 claw: achenes not wrinkled on the sides. 



Tribe iv. Sepals imbricated in the biid. Petails small or irreg- 

 ular or none. Fruit 1-several fbllicles, or a 1-celled berry. Leaves 

 . alternate. 



» Fruit 1- several follicles. 

 H- Flowers regular; follicles 1-15. 

 ^ Caltha. Sepals petaloid; petals none; leaves simple; cai-pels 5-15. 



9 TroUinsi Sepals 5-15, petaloid : petals 5-20, tubular at base; follicles 



sessile; leaves palmately parted. 



10 CoptiSi Sepals 5-6, greenish : petals 5^ enlarged in th^ middle or at the 



summit ; carpels 5-10, stipitate ; leaves compound, persistent. 



II Aqnilej^ia, Sepals 5, colored : petals 5, all spurred backwards : carpels 

 5, sessile : leaves ternately compound. 



