RANUNCULACEAE 521 
achene-body obovoid, about 1 mm. long, minutely beaked.—Ponds and low 
grounds, various provinces, Ala. to Calif. and Ark.—Sum 
4, R. pusillus Poir. Stem glabrous, 14 dm. tall: blades of the Meis leaves 
ovate to oblong, e em. lon ng those of the upper leaves ape en linear: petals 
ost 
1-3, 1-3 . long: head of fruit ovoid, 3-4 mm. thick: ac hea Lt 
ellipsoid or ellipsoid- men) p 1.5 mm. long, meet flattened.— (LESSE 
SPEARWORT.)—Marshes, various provinces, Fla. to Tex., Mo. and N 
Spr.-sum 
. R. oblongifolius Ell. Stem mostly pubescent below, 1-5 dm. tall: blades of 
d lower leaves ovate to elliptic, 1—4 cm. long, undulate to denticulate, those 
p the dpa leaves narrow, commonly Nu toothed: petals mostly 5, 3.5—5.5 
ong: head of fruit 3-4 mm sa achen il obovoid, about 1m mm. long, 
turgid, margined within at the (MANY WERED SPEARW WORT. eens 
Coastal Plain and adj. hee "Fla. to Tex., "Mo. and Va.—Spr 
R. mississippiensis Small. Stem sometimes pubescent below, 2—3 dm. tall: 
blades of the lower leaves ovate, 2-6 em. long, crenate or undulate-crenate, ee 
an the upper a eae more cole eae dac toothed : petals et 
n 5, 7-8 m : head of fruit 3-5 m n diameter: achene-body 
pare about 1. $ um long.—Alluvial soil, Coastal Plain, Miss. to Ark Besar 
R. obtusiusculus Raf. Stem stout, glabrous, 3-12 dm. long: leaf blades 
ae to lanceolate, 8-15 cm. long, denticulate or entire: oe 5-7, 5-8 m 
long: head of fruit globose or pil so, 4.5-6 mm. thick, or longer: achene 
nied i cupidi about 2 m long, the subulate Sane beak hor 
tal [R. ambigens 8. Wats. J— WAT -PLANTAIN SPEARWORT. jit cad 
and rr c sire provinces, Coastal Plain only N, Ga. to Mo., Minn., Ont., 
and Me.—Sum 
8. a abortivus L. Stem 1.5-6 dm. tall, glabrous or nearly so: blades of the 
lower leaves reniform to suborbicular, 2-4 em. wide, mostly crenate: petals 
"s Soon 2-3 mm. long: head of fruit ellipsoid to cylindric: achene-body 
fully 1.5 m mm. lon ng, y ery minutely beaked.—(KIDNEY-LEAF BUTTERCUP.)—Moist 
zi and thickets, various provinces, Fla. to Ark., Colo., Man., and Lab.—Spr. 
E. micranthus Nutt. Stem typically more pees than in R. abortw 
e blades of the lower leaves cuneate to 1-3 cm. long, iiie 
erenate-lobed or parted: petals light-yellow, 2—3 A pius head of fruit ellip- 
soid pi ovoid-ellipsoid: achene-body barely 1.5 mm. long, minutely shor d. 
—Woods and rocky hillsides, various provinces N of Coastal Plain, Ga. to Ark, 
Colo., Sask., and Me.—Spr. 
. R. allegheniensis Britton. Stem um we age abus blades of the lower 
orbi 
pies EE cular-reniform monly crenate-lobed: 
petals 1.5-2.5 m ns ong: he y of fruit uo void: eR teu 
ong, with a Prep curved —Woods, Blue Ridge and more northern prov- 
inces, N. C. to Ala. and Mass E 
11. R. sceleratus L. Ste em stout, 1.5-6 dm. tall, glabrous or nearly so: leaf- 
blades thick, the divisions cuneate, lobed: sepals ovate to suborbicular: ‘petals 
bright- yellow, ae mm. long: head of fruit cylindric to oo the ee 
glabrous or sparingly pubescent: achene-body Euri 1 . long, minutely 
beaked, thick-margined, the faces unev RE CELERY-LEAVED on ERCUP. DITCH- 
CROWFOOT. CURSED-CROWFOOT.)—Wet places d swamps, sometimes in saline 
soil, various provinces, throughout the U. S. and S Can.; also in ae - —Nat. 
of Eu., whence apparently introduced into part of America.—Spr.-s 
