300 
Ei 
NORTH AMERICAN FLORA 
Leaves densely silky on both sides. 
Pubescence white; stem erect or ascending. 
Leaves with 2 or 3 pairs of leaflets; bractlets much shorter than 
the sepals; stem strict. 
Leaves with 3-5 pairs of leaflets; bractlets little if at all shorter 
than the sepals ; stem decumbent-ascending. 
Leaflets deeply cleft. : 
Leaflets merely toothed. 
Pubescence yellowish ; stem decumbent-prostrate. 
XXVIII. CANDICANTES 
One Mexican species. 
XXIX. LEUCOPHYLLAE 
Leaflets oblanceolate or obovate, serrate or crenate. 
Pistils 20 or fewer ; bractlets much shorter than the acuminate sepals ; 
tomentum, if any, loose and not dense. 
Plant tomentose throughout. 
Plant green and nearly glabrous up to the inflorescence. 
Pistils usually more than 20. 
Leaves white-tomentose beneath; pubescence of the stem and 
petioles mostly appressed. 
Leaves almost equally white-pubescent on both sides. 
Bractlets much shorter than the acuminate sepals. 
Leaflets not closely approximate, finely tomentose. 
Leaflets closely approximate, coarsely appressed-silky as 
well as tomentose. 
Bractlets at least 3% as long as the acute sepals. 
Inflorescence open; leaves silky and shining. 
ae dense ; leaves loosely tomentose and rather 
ull. 
Leaves green and merely silky above. 
Leaflets usually 9, all usually ascending; the upper pair 
decurrent. 1 
Leaflets 5-7, the lower spreading or reflexed; the upper 
pair not decurrent. 
Leaflets densely white beneath ; teeth ovate. 140. 
a thin, sparingly tomentose beneath ; teeth lanceo- ‘ 
ate. 
Leaves green beneath, only slightly tomentulose when young ; 
pubescence of the stems and petioles spreading. 
Leaflets cuneate, cleft (rarely only toothed) at the apex. 
Leaflets with rather short and broad, ovate or lanceolate divisions. 
Basal leaves with 5-7, closely approximate, broadly cuneate or 
flabelliform leaflets ; stem-leaves mostly ternate. 
Basal leaves with 7-17 cuneate leaflets; stem-leaves pinnate. 
Leaflets with narrow, linear-oblong divisions. 
133. 
137. 
XXX. MULTIJUGAE 
Pedicels at least in fruit arcuate-spreading ; stems diffuse or spreading, 
except in a rare form of P. platlensis. 
Leaflets almost digitately divided into few linear divisions. 
Stem and petioles rather copiously hairy with long ascending or 
at length spreading hairs. 
Stem and pedicels sparingly strigose with short appressed hairs. 
Bractlets lanceolate, acute, equaling the sepals or nearly so. 
Bractlets elliptic or oblong, obtuse, much shorter than the 
sepals. 
Leaflets pinnately divided with several or many oblong or lanceolate 
divisions. 
Pedicels erect or ascending, straight; stem erect or ascending. 
Leaves dissected to near the midrib. 
Leaflets with 7-9 divergent segments. 
Leaflets with 3~5 (seldom 7) ascending segments. 
Young leaves covered with dense short pubescence, inter- 
mixed with some tomentum ; older leaves yellowish-green. 
Young leaves with long coarse white hairs, but no tomentum. 
Stem and mature leaves glabrate; leaflets cuneate, cleft 
‘above the middle into oblong or ovate divisions. 
Stem 1-3 dm. high; leaflets elongate-cuneate with ob- 
long divisions. 
Stem about 1 dm. high; leaflets short-cuneate, merely - 
toothed at the apex. 15; 
Stem and mature leaves more or less hairy ; leaflets obovate, 
at least the upper pinnatisect. 
Divisions of the leaflets long, narrowly linear ; stem 2-3 
dm. high ; leaflets many. 
Divisions of the leaflets oblong or oblanceolate ; stem 
less than 2 dm. high’; leaflets few. 
129, 
130. 
131. 
132. 
134, 
135. 
136. 
wv NM DX 
143. 
144, 
150. 
P. 
146, P. 
47. P. 
P. 
149. 
150. 
151. 
153. 
154. 
28, P. 
P. 
P. 
P. 
P. 
P. 
P. 
39, P. 
P. 
41, P. 
42. P. 
P. 
P. 
P, 
[VoLuME 22 
Jjilicaulis. 
Macounti, 
proxima, 
luteosericea. 
candicans, 
coloradensis, 
rupincola, 
effusa. 
lupina. 
Hippiana. 
argyrea. 
propinqua. 
pulcherrima. 
viridior. 
ambigens. 
Bruceae. 
Breweri. 
versicolor. 
klamathensts. 
millefolia. 
Flickmant. 
platiensis. 
arizonica, 
versicolor. 
Nelsoniana. 
decurrens. 
wyomingensis. 
ovina. 
