298 NORTH AMERICAN FLORA 
Leaflets spatulate or obovate ; teeth usually spreading. 
Stem sparingly hairy ; bractlets linear-lanceolate. 
Stem densely pubescent ; bractlets oblong. 
Leaflets cuneate or cuneate-oblanceolate, toothed above the 
middle, teeth ascending. 
Leaves rather densely silky. 
inclined to be pinnate. 
Sepals 5-6 mm. long. 
Sepals 7-9 mm. long. 
Leaves slightly pubescent, in age glabrous and somewhat 
glaucous, digitate. 
Plant with a short woody caudex; leaflets usually ob- 
lanceolate-cuneate. (Rocky Mountain valley species.) 86. 
Plant with a long cespitose creeping rootstock: leaflets 
obovate-cuneate. (Arctic species.) 
Leaves cleft or divided, the divisions extending two thirds to the mid- 
rib or further. 
Leaflets cleft into oblong or lanceolate divisions, slightly silky- 
strigose, in age glabrate. 
Leaflets divided into linear divisions, permanently strigose. 
96. 
95. 
jgose ; the basal ones often 
85. 
37. 
89. 
XX. SUBVISCOSAE 
Petals not unguiculate. 
Leaflets 1~2.5 cm. long, silky, not at all glandular ; stem usually 1-2 
em. long. 
Leaflets less than 1 cm. long, hirsute and usually more or less 
glandular-granuliferous ; stem 5 cm. long or less. 
Petals unguiculate ; plant hirsute and glandular-puberulent. 
Leaflets 1-4 cm. long. 92. 
Leaflets 5-7 cm. long, with prominent veins. 93. 
XXI. CONCINNAE 
Leaflets densely silvery-silky on both sides, only slightly if at all tomen- 
tose beneath. 
Leaflets deeply dissected. 48. 
Leaflets merely toothed. 
Inflorescence many-flowered and dense. 
Leaflets oblanceolate or narrowly obovate, bractlets linear- 
lanceolate. 94 
Leaflets broadly obovate, bractlets mostly oblong. 95 
Inflorescence few-flowered and open. 96 
Leaflets densely white-tomentose beneath. 
Leaflets merely crenate or serrate. 
Leaflets obovate to oblanceolate, toothed except at the very base. 
Leaflets of the basal leaves obovate, coarsely serrate with ovate 
ot rounded teeth. 
Sepals ovate, acute. 97. 
Sepals lanceolate, acuminate. 
Leaflets obovate, few-toothed. (Occasional forms of) * 108. 
Leaflets oblanceolate, many-toothed. (Depauperate 
forms of) 63. 
Leaflets of the basal leaves oblanceolate, serrate, with small 
oe directed forward; sepals and bractlets narrowly lance- 
olate. 
Leaflets oblong with entire margins, only 3-toothed (seldom 5- 
98. 
toothed) at the apex. 99. 
Leaflets deeply dissected. 
Pubescence spreading, loose. 106. 
Pubescence mostly appressed. : 
Bractlets lanceolate or linear-lanceolate, acute; petals light- 
yellow. 
Plant diffuse; sepals ovate; leaves more or less grayish 
above. 
Plant erect or ascending; sepals lanceolate, acuminate ; 
leaves green above. 
Sepals lanceolate; bractlets linear-lanceolate; leaflets 
broadly obovate. 
Sepals linear-lanceolate ; bractlets narrowly linear; leaf- 
lets narrowly obovate or oblanceolate. 07 
Bractlets linear, obtuse; petals 4 mm. long, golden; inflo- 
rescence rather dense. 102. 
XXII, NIVEAE 
Stem 3-5 dm. long ; leaflets lanceolate. (Mexican species. ) 103. 
Stem usually less than 3 dm. long ; leaflets oblanceolate, obovate, or 
cuneate. (Arctic-alpine species.) 
Bractlets linear or lanceolate, rarely oblong. 
[VoLUME 22 
P. concinnaeformis. 
P, Hasset. 
P. diversifolia. 
P. macropetala, 
P. glaucophylla. 
87, BP. Ranunculus. 
88. P. perdissecta. 
P. multisecta. 
90. P. Wheeleri. 
91. P. wiscidula. 
P. subviscosa. 
P. ramulosa. 
P. Pecten. 
. BP. fastigiata. 
. PB. Hasset. 
. P. concinnaeformts. 
P, concinna. 
P. nivea, 
LP, filipes. 
P. oblanceolata. 
P, bicrenata. 
P. Pedersentt. 
00. P. divisa, 
. P. quinguefolia. 
. P. nipharga. 
P. modesta, 
P. Pringlet. 
