462 MINNESOTA BOTANICAL STUDIES. 



4. B. hederaceum S. F. Gray, Nat. Arr. Brit. PI. 2: 721. 



1821. 

 Ranunculus hederaccus LINN. Sp. PL 556. 1753. 



Semi-aquatic, rooting freely from the nodes, in the mud : 

 leaves seldom submersed, but floating or resting on the mud ; 

 all reniform or nearly so, angulate-lobed, never finely dissected ; 

 peduncles as short as the petioles : petals deciduous : styles 

 shorter than ovaries, introrsely stigmatose ; receptacle glabrous. 

 Naturalized from Europe at Norfolk, Va., and on Newfound- 

 land. 



5. B. Lobbii HOWELL, Fl. N. W. Am. i: 13. 1897. 

 Ranunculus hederaceus var. TORR. Pac. Ry. Rep. 4 : 



62. 1853. 

 7?. hederaceus var. Lobbii LAWSON, Rev. Canad. Ranunc. 



44. 1870. 

 R. hydrocharis subsp. Lobbii HIERN. Seem. Journ. Bot. 



9: 66. /. 114. 1871. 



R. aquatilis var. Lobbii WATS. Bibl. Index 17. 1878. 

 R. Lobbii GRAY, Proc. Am. Acad. 21 : 364. 1886. 



Leaves commonly all floating, small, truncate or cordate at 

 base, divergently 3-parted : petals persistent ; stamens 5 to 10 ; 

 styles long and filiform; stigma terminal. In mud or water of 

 pools, etc. California and Oregon. 



RANUNCULUS LINN. Sp. PL 548. 1753. 



The name is the Latin diminutive for frog, given because 

 many of the species grow in wet places. 



The genus is by far the largest in the Ranunculacese, com- 

 prising upwards of 200 species. 90 of these are natives or 

 naturalized in North America ; of those in the trade in this 

 country five are native here ; one in the Canaries ; five in Eu- 

 rope, and two of these also in Asia. Those cultivated are so 

 indicated in the following treatment. Members of the genus 

 are found in mountainous regions, and in cold and temperate 

 parts of the globe. 



Perennial (rarely annual) herbs : leaves alternate, simple, en- 

 tire, lobed, dissected or divided : flowers yellow, white or rose ; 

 sepals usually 5, deciduous or marcescent-persistent ; petals 5 

 or more, conspicuous or minute, nectar pit and scale at base ; 

 carpels many, i-ovuled : akenes generally flattened, smooth, 



