462 MINNESOTA BOTANICAL STUDIES. 
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a, B:hederaceum. S. F. (Gray, Nat. Arr. Brit.) Pl 2:72am. 
S20 
Ranunculus hederaceus LANN. 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 5 
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. 
fee. opp Howey, Fl. N. W. Am. £:°13. @eéo7. 
Ranunculus hederaceus var. TORR. Pac. Ry. Rep. 4: 
O22 WSs 3e 
R. hederaceus var. Lobétt Lawson, Rev. Canad. Ranunc. 
Wa) OVO: 
R. hydrocharis subsp. Lobdi Hiern. Seem. Journ. Bot. 
OG li, 0 1871- 
R. aguatilis var. Lobbet Wats. Bibl. Index 17. 1878. 
i. dobb7' Gray, Proc. Am. Acad. 21:,364. 13836, 
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 Lin. 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 Ranunculacee, 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, 
