
Rosaceae 211 
EE. Leaflets merely toothed. 
F. Leaflets oval or ovate. C. 
H. capitata Lindl. 
FF. Leaflets obovate or cuneate. 
G. Stems |—2 dm. high; stipules lanceolate; petals 2—3 mm. long, 
- emarginate. E. H. parviflora, Nutt. 
GG. Stems 2—6 dm. high; stipules ovate or ovate-lanceolate; petals 
3—5 mm. long, truncate. E. (H. pseudocapitata. ) 
, H. fusca Lindl. 
CCC. Basal leaves with 4—10 leaflets. 
H. Leaflets of basal leaves linear-oblong; petals light yellow at least when 
dry. U. Ai. congesta Hook. 
HH. Leaflets of basal leaves wider or else widest above their middle; petals 
white. C. E. H. tridentata Torr. 
BB. Stipules of the lower leaves dissected into linear-filiform hairy segments. 
I. Cyme open and loose; leaflets divided to the base into oblong or oval segments. 
é H. howellii Rydb. 
II. Cymes fastigiately corymbose; leaflets merely 2—-5-toothed or -cleft at apex. 
J. Plant with silky hairs; leaflets 8—10. U. 
H. congesta Hook. 
JJ. Plant with coarse stiff hairs; leaflets 10—-20. C. 
H. hirsuta Lindl. 
III. Cymes fastigiately corymbose; leaflets divided to near the base into linear 
segments. U. C. (H. caruifolia.) 
H. daucifolia Rydb. 
AA. Petals yellow. 
K. Leaflets 12 or fewer. 
L. Stipules dissected; leaflets linear-oblong; petals longer than the calyx-seg- 
ments; filaments lanceolate. U. 
H. congesta Hook. 
LL. Stipules entire; leaflets obovate or orbicular; petals shorter than the calyx- 
segments; filaments filiform. E. (Jvesia bailevi.) 
H. baileyi Rydb. 
KK. Leaflets 20 or more. 
M. Whole plant silvery-white; stamens 20. C. E.  (Jvesia pickeringii.) 
H. pickeringii Rydb. 
MM. Plant not silvery-white; stamens 5. 
N. Cyme flat-topped; sepals 2.5 mm. or less long; petals as long or longer 
than the calyx-segments. E. (J/vesia tweedvi.) 
H. utahensis Rydb. 
NN. Cyme head-like; sepals about 5 mm. long; petals shorter than the calyx- 
segments. E. (H. gordoni alpicola; Ivesia alpicola.) 
H. gordoni Hook. 
POTENTILLA. 5-FINGER 
Herbs, annual or perennial. Leaves pinnately or digitately or ternately compound. 
Flowers usually in panicled cymes. Calyx-cup mostly hemispheric; segments 4—5. 
Petals 5, deciduous, obcordate to round, usually not clawed, yellow or white or dark 
purple. Stamens usually 20, in 3 series of 10-+5-+-5 respectively, near the base of the 
calyx-cup; style near apex of ovary, jointed to it, deciduous. (Diminutive of L. potens= 
powerful; first applied to Argentina anserina which was thought to be medicinal.) 

