RANUNCULACE.^ 9 



II. Helleborus, L. 



Flowers regular; sepals green or white, persistent; 

 petals small, 2-lipped. 



H. viridiSy L., Bear's-foot, with annual leafy stems 

 and green sepals, is found in pastures in Switzerland 

 and Pyrenees. H. fceiidus, L., Stinking Hellebore, with 

 perennial leafy stems and green sepals, is very abundant 

 in stony pastures in Western Switzerland (Jura) and 

 Pyrenees. H. niger, L., Christmas Rose, with white 

 sepals and leafless stem, occurs locally on calcareous 

 soil in Switzerland, especially in Ticino. 



12. NiGELLA, L. 



Flowers regular; sepals blue; petals 2-lipped, necta- 

 riferous; folHcle terminated by a long curved style; 

 leaves divided into linear segments. Not alpine. 



Three species of Love-in-a-puzzle, N. arvensiSy L., 

 sativa^ L., and darnascena^ L., are weeds in cultivated 

 land in Pyrenees ; and A^. arvensis, distinguished by the 

 absence of an involucre, also in Southern Switzerland. 



13. ISOPYRUM, L. 



Sepals 5, petaloid, deciduous; petals 5, minute, cornu- 

 copia-shaped ; fruit of I -3 follicles. 



/. thalictroideSy L., with panicles of small white flowers 

 and delicate twice-ternate leaves ; in mountain copses in 

 Savoy, Dauphiny, and Pyrenees. 



14. Aquilegia, L. 



Flowers regular ; sepals coloured; petals large, spurred; 

 follicles 5. 



