1921] Smiley: Flora of the Sierra Nevada of California 71 



Stamens numerous, monadelphous; ovary several-celled. 



Family 37. Malvaceae 



Pistils 4 or 5, distinct; stamens 10. Family 28. Crassulaceae 



Petals 4, in pairs; sepals 2; stamens 6, diadelphous. 



Family 25. Fumariaceae 

 Stamens 5 or fewer. 

 Corolla regular. 

 Pistil 1. 



Stamens as many as the lobes of the corolla and opposite to 



the lobes. Family 45. Primulaceae 



Stamens as many as or fewer than the lobes of the corolla and 



alternate with the lobes. 

 Ovary 1 or 2-celled; styles or stigmas 2 or 1. 



Fruit with septicidal dehiscence; herbage smooth; style 1, 

 entire or slightly lobed at tip; ovary 1-celled. 



Family 46. Gentianaceae 



Fruit with loculicidal dehiscence; herbage more or less 

 hairy; styles 2, or 1 and 2-cleft; ovary 1 or 2-celled. 



Family 49. Hydrophyllaceae 

 Ovary 3-celled; style 3-cleft or 3-lobed. 



Family 48. Polemoniaceae 



Ovary 4-celled and usually 4-lobed, the lobes maturing into 

 4 nutlets; leaves and stems harsh to the touch or densely 

 ^covered with prickles. 



Family 50. Borraginaceae 

 Pistils 2, becoming follicles with seeds (in ours) long comose. 



Family 47. Apocynaceae 

 Corolla irregular, more or less conspicuously 2-lipped. 



Ovary 4-lobed, splitting into as many nutlets; foliage aromatic. 



Family 51. Labiatae 

 Ovary entire, developing into a capsule. 



Ovary 1-celled; aquatic plant with finely dissected leaves. 



Family 54. Lentibulariaceae 



Ovary 2-celled; terrestrial plants. Family 52. Scrophulariaceae 

 Ovary inferior. 



Stamens distinct; flowers not in involucrate heads. 



Calyx persistent upon the achene-like fruit, its free limb divided 

 into about 15 filiform divisions and forming a kind of pappus; 

 stamens 3; herbs only. Family 56. Valerianaceae 



Calyx not pappose; herbs and woody plants. 



Leaves small, verticillate in whorls of 3 or more; stems delicate, 

 herbaceous or slightly woody; annuals and perennials. 



Family 53. Rubiaceae 

 Leaves opposite, medium to large in size; all woody plants. 



Family 55. Caprifoliaceae 



Stamens united by their anthers to form a tube about the divided 

 style; stamens always 5; flowers in involucrate heads. 



Family 57. Compositae 



