Onagraceae 263 
CC. Perennial; leaves lanceolate to ovate. 
E. Petals 3—5 mm. long; plant not canescent-puberulent. 
F. Leaves sessile, plant almost simple. W.C. E. (E. halleanum; E. 
brevistylum. ) E. ovatifolium Rydb. 
FF. Leaves abruptly and shortly wing-petioled; plant freely branched. W. 
C.E. (E. adenocaulon occidentale; E. coloratum for our region. ) 
E. adenocaulon Haus. 
| FFF. Leaves or at least the upper gradually tapering to slender petioles; 
plant almost simple. E. (E. adenocaulon perplexans. ) 
E. perplexans Trel. 
EE. Petals 6—10 mm. long; plant canescent-puberulent. E. 
E. franciscanum Barb. 
AA: Stems low, |—3 dm. high; mostly alpine or subalpine species. 
| G. Leaves all entire. 
H. Plant annual; stigma slightly 4-lobed; leaves 12-20 mm. long. W.C. E. 
E. minutum Lindl. 
HH. Plant perennial; stigma shghtly 2-lobed or entire. 
I. Seed papillate when seen under the microscope. 
J@ eleaves. glaucous.. W. C: E. (E. glaberrimum latifolium; E. glab- 
berrimum; E. fastigiatum glaberrimum. ) 
E. fastigiatum Pip. 
JJ. Leaves not glaucous. 
K. Leaves broadly ovate, spreading, not keeled. W. C. E. 
E. clavatum Trel. 
KK. Leaves lanceolate, erect, keeled near the base. C. E. (E. ore- 
gonense gracillimum.) 
E. pringleanum Haus. — 
II. Seed smooth when seen under the microscope. 
L. Stem ascending, usually curved; leaves spreading, oval or oblong. W. 
On De E. anagallidifolium Lam. 
LL. Stem erect; leaves ascending, linear or oblong-lanceolate. W. C. E. 
E. oregonense Haus. 
GG. Some of the leaves denticulate or more coarsely notched. 
M. Stems branched. 
N. Pubescence of stem in lines; pedicels about as long as the capsules; seed | 
mm. long. W.C. (E. leptocarpum macounii.) 
E. leptocarpum Haus. 
NN. Pubescence of stem not in lines; pedicels much shorter than the capsules; 
seed 2mm. long. W. E. mirabile Trel. 
MM. Stems simple. 
O. Leaves less than 2.5 cm. long. 
P. Plant pilose-pubescent. U. C. E.  (E. ursinus subfalcatum.) 
E. ursinus Par. 
PP. Plant not pilose. 
Q. Leaves sessile, 1—1.6 cm. long; stem sparingly incurved-pubescent. 
W. E. davuricum Fisch. ‘ 
QQ. Leaves petioled, 2—2.5 cm. long; stem glabrous except in the in- 
florescence. W. C. E. 
E. hornmanni Reich. 
OO. Leaves more than 2.5 cm. long; petals white or pale rose-color. 
P. Leaves elliptic, petioled; seed smooth. W. C. E. 
E. alpinum L. 



