1921] Smiley: Flora of the Sierrw Nevada of Calif ornia 69 



**Calyx and corolla both present, the latter of distinct petals. 

 Calyx entirely free and separate from the pistil or pistils. 

 Flowers with stamens distinct. 



Stamens hypogynous, more than 10. 



Pistils several to many, simple and distinct, becoming achenes or 

 follicles. Family 24. Ranunculaceae 



Pistil 1. 



Ovary 1-celled. 



Leaves entire, fleshy; petals 8-16, sepals 4-8, style divided into 

 filiform divisions. Family (22). Lewisia 



Leaves compound, thin or membranous; petals reduced or some- 

 times wanting, sepals 4; style obsolete and stigma broad, 

 obscurely lobed. Family (24). Actaea 



Ovary more than 1-celled. 



Aquatic herb with peltate leaves, petals 10-20, sepals 5-12, 



anthers dark red. Family 23. Nympheaceae 



Terrestrial creeping dwarf plants; petals 5, sepals 5, stamens 



in 3-5 bunches, anthers yellow. Family 38. Hypericaceae 



Stamens hypogynous, 10 or fewer. 



Pistils more than 1, distinct. 



Pistils more numerous than sepals or petals. 



Family 24. Ranunculaceae 



Pistils as many as the sepals or petals. Family 28. Crassulaceae 



Pistils 5, more or less united at first but separating as 1-seeded 



carpels when mature. Family 32. Geraniaceae 



Pistil 1. 



Ovary becoming 2-celled by a false partition; flowers cruciferous 

 (4 sepals, 4 petals, 6 stamens— 4 long, 2 short — or rarely 

 fewer; fruit a silique or silicle). Family 26. Cruciferae 



Ovary 1-celled; stamens equal. 



Corolla irregular (= petals not uniform) 



Stamens 5, connivent over the ovary; petals 5, lower petals 



spurred; sepals 5, unequal. Family 39. Violaceae 



Stamens 6; petals 4; sepals 2; flowers somewhat cordate at 



base. Family 25. Fumariaceae 



Corolla regular. 



Leaves strictly basal with circinnate vernation, bearing viscid 

 glandular hairs; flowers in secund racemes on leafless 

 peduncles; insectivorous bog-plants. 



Family 27. Droseraceae 

 Leaves not strictly basal, usually more or less scattered on 

 the stems; no insectivorous bog-plants. 

 Leaves reduced to funetionless scales; white or brownish 

 saprophyte of coniferous forest floors. 



Family (44). Pleuricospora 

 Leaves not reduced to scales; autotrophic plants. 

 Calyx of 4 or 5 distinct or united sepals. 



Family 21. Caryophyllaceae 

 Calyx of 2 distinct sepals. Family 22. Portulacaceae 



Ovary more than 2-celled. 



Anthers opening by terminal pores. Family 44. Ericaceae 



Anthers opening by longitudinal slits. Family 33. Linaceae 



