20 Family Key 
C. Flowers irregular; stamens didynamous, inserted in the tube of the corolla; 
cells of the ovary |. OROBANCHACEAE (p. 360) 
CC. Flowers regular or nearly so; stamens not didynamous, inserted on the recep- 
tacle; cells of the ovary | or 4 or 5. 
D. Plants reddish, glabrous, 25 mm. or less high; stem not densely covered 
with scales; scales entire; pollen grains in 4’s. 
Pyrola in PyROLACEAE (p. 291) 
DD. Not as above in all points; pollen grains simple. 
MONOTROPACEAE (p. 292) 
GROUP 16—Dicotyledonous herbs with alternate simple leaves and apetalous flowers 
A. Ovary and fruit. superior. 
B. Pistils more than 1, distinct. 
CC. Flowers regular or nearly so; stamens not didynamous, inserted on the recep- 
tire, 2—3 dm. long. PHYTOLACCACEAE (p. 147) 
C. Plant 1—3.5 m. high; leaves ovate-lanceolate, pinnately veined, petioled, en- 
D. Stamens on the calyx; stem 2—20 cm. long; leaves rounded, cuneate at 
base, 4—13 mm. long, deeply 3-lobed, lobes 2—4-cleft; stipules large, 2—5- 
cleft. Alchemilla in ROSACEAE (p. 206) 
DD. Stamens on the receptacle; stems often longer; leaves not as above in all 
characters; stipules none, but the base of the petiole often dilated. 
RANUNCULACEAE (p. 162) 

BB.  Pistil only 1. 
E. Leaves lobed, palmately veined. 
F. Plant 2—20 cm. high, annual; leaves cuneate at base, 413 mm. long, 
deeply 3-lobed, lobes 2—4-cleft; stipules 2—5-cleft. 
Alchemilla in ROSACEAE (p. 206) 
FF. Plant often taller, perennial; leaves mostly cordate at base, 13 mm. or 
more long, shallowly lobed, lobes often not entire although not again cleft; 
stipules entire. Heuchera in SAXIFRAGACEAE (p. 195) 
EE. Leaves either not lobed or else pinnately veined. 
G. Plant stout, erect, 1—3.5 m. high; leaves entire, acute or acuminate at 
both ends, 2—3 dm. long; ovary 10-celled; fruit a purple berry. 
: PHYTOLACCACEAE (p. 147) 
GG. Plant mostly not fitting the above; leaves not as above in all points; 
ovary |—5-celled; fruit not a berry, dry. 
H. Plant with a mustard or radish taste. CRUCIFERACEAE (p. 176) 
HH. Plant without a mustard or radish taste. 
I. Seeds 2 or more in each pistil. 
J. Plant with milky juice; ovary and capsule 3-celled; capsule 3-seed- 
ed. Euphorbia in EUPHORBIACEAE (p. 245) 
JJ. Plant without milky juice; ovary and capsule 2-celled; capsule 
many-seeded. 
K. Plant glabrous; leaves linear to lanceolate; flowers solitary in 
leaf axils. Lythrum in LYTHRACEAE (p. 259) 
KK. Plant white-woolly; leaves lanceolate to ovate; flowers in a 
dense terminal cylindrical spike. 
Synthyris in SCROPHULARIACEAE (p. 341) 

II. Seed 1 in each pistil. 
L. Plant densely hoary with stellate hairs, simple ones also present; 
in dry regions east of the Cascades. 
Piscaria in EUPHORBIACEAE (p. 245) 
