74 RANUNCULACEAE. (Vor. II. 
3. Ranunculus Missouriénsis Greene. Missouri Buttercup. (Fig. 1597.) 
Ranunculus Missouriensis Greene, Erythea, 3: 20. 
1895. 
Perennial (?), similar to the preceding species 
but larger, sparingly pubescent; stems slender, 
decumbent, leafy, 1° long or more, rooting at 
the lower nodes. Leaves usually wider than 
long, thin, 1’-3’ wide, palmately divided nearly 
to the base into 3 obovate-cuneate incised and 
lobed segments, the lobes obtuse; petioles slen- 
der; flowers yellow, long-peduncled, 3//-4/’ 
broad; petals about 5; head of fruit oblong, 
about 4’’ long; achenes compressed, somewhat 
wrinkled, rather more than 1%4’/ long, promi- 
nently callous-margined on the back, abruptly 
tipped by a subulate style of rather more than 
one-half their length. 
In ditches and on borders of lakes, Missouri to 
New Mexico. July-Aug. 
4. Ranunculus hyperboreus Rottb. Arctic Buttercup. (Fig. 1598.) 
Ranunculus hyperboreus Rottb. Skrift. Kjoeb. Selsk. 10:458. 1770. 
Stem slender, glabrous, filiform, creeping, 2-6’ long. Leaves 
petioled, 3-lobed or cleft, broadly ovate, 2’’-5’’ broad, 2’/-4’” 
long, obtuse, the base cuneate or rounded, the lobes oblong, ob- 
tuse, the lateral ones sometimes toothed; petioles sheathing and 
biauriculate; flowers few, 2/’-3/’ broad, yellow; petals slightly 
shorter than the reflexed sepals; peduncles 4//-6’’ long; head of 
fruit globose, 2’’ broad; achenes slightly compressed, with a 
minute blunt point. 
Labrador, arctic America, Iceland, northern Europe and Siberia. 
Summer. 
5. Ranunculus Lapponicus L. Lapland Buttercup. (Fig. 1599.) 
Ranunculus Lapponicus ¥,. Sp. Pl. 553- 
1753: 
Anemone nudicaulis A. Gray, Coult. Bot. 
Gaz. 11:17. 1886. 
Scapose from running rootstocks, 3/-6’ 
high. Basal leaves long-petioled, the 
blade 1/-1'4’ broad, reniform, 3-parted, 
the divisions broadly obovate, cuneate, 
obtuse, crenate or lobed; scape 1-flow- 
ered, slender, longer than the leaves, oc- 
casionally bearing a single deeply lobed 
leaf; flower 3’’-5’” broad, yellow; petals 
5-6; sepals generally fewer and reflexed; 
head of fruit globose, 6’’ broad; achenes 
flattened, ovate, gradually narrowed into 
a slender hooked beak. 
Lake Nipigon and Thunder Bay, Lake 
Superior, northern Minnesota, western arc- 
tic America, and in northern Europe and 
Siberia. Summer. 
