24 FAMILY KEY 



BB. Pistil only i. 

 E. Leaves lobed, palmately veined. 



F. Plant 2-20 cm. high, annual; leaves cuneate at base, 4-13 mm. long, deeply 

 3-lobed, lobes 2-4-cle£t; stipules 2-5-cleft. AlchemUla in Rosaceae (p. 125) 



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. 118) 



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 lo-ceUed; fruit a purple berry. 



Phytolaccaceae (p. 86) 

 GG. Plant mostly not fitting the above; leaves not as above in all points; 

 ovary i-s-celled; fruit not a berry, dry. 

 H. Plant with a mustard or radish taste. Cruciteeaceae (p. 106) 



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- 

 seeded. Euphorbia in Euphorbiaceae (p. 145) 



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 Lytheaceae (p. 156) 



KK. Plant white-woolly; leaves lanceolate to ovate; flowers in a dense 

 terminal cylindrical spike. Synlhyris in Scrophulaeiaceae (p. 198) 



n. Seed I in each pistil. 

 L. Plant densely hoary with stellate hairs, simple ones also present : in dry 

 regions east of the Cascades. Piscaria in Exiphorbiaceae (p. 14s) 



LL. Plant without stellate hairs, often with simple ones; in either dry 

 or moist regions. 



M. Leaves with sheathing stipules. Polygonaceae (p. 79) 



MM. Leaves without stipules. 



N. Either the akene 3-angled in cross section, or else the calyx of 6 



segments. Polygonaceae (p. 79) 



NN. Akene or utricle not 3-angled in cross section; calyx never of more 



than s segments. 



O. Leaves entire, 3-veined from the base, lanceolate or ovate; stamens 4; 

 style I or none. Parietaria in Urticaceae (p. 76) 



00. Leaves with not all 3 of the above characters; stamens sometimes 

 4; style sometimes r. 

 P. Leaves entire; flowers bracted; bracts and sepals scarious. 



Amaranthaceae (p. 84) 

 PP. Leaves entire or not ; either the flowers bractless or the bracts not 

 scarious; sepals green or greenish. Chenopodiaceae (p. 83) 



AA. Ovary and fruit inferior. 

 Q. Leaves pinnately veined or only i-veined, entire or very nearly so. 

 R. Leaves linear-setaceous. Howellia in Lobeliaceae (p. 217) 



RR. Leaves wider. 

 S. Stem terete; flowers in cymes; fruit fleshy, drupaceous. 



Santalaceae (p. 77) 



