=DROSERACEAE=, p. 48.

45c. Leaves flat, pubescent or smooth, but not with long glandular hairs
--46.

46a. Sepals and petals each 4 53, in =CRUCIFERAE=, p. 46.

46b. Sepals and petals each 5 --47.

46c. Sepals 6; petals none; flowers minute, green; leaves
frequently lobed at the base 4, in =POLYGONACEAE=, p. 25.

47a. Petals united with each other in an irregular corolla
=LENTIBULARIACEAE=, p. 105.

47b. Petals separate from each other --48.

48a. Stamens 10; style 1 =ERICACEAE=, p. 84.

48b. Stamens 5 or 10; styles 2 =SAXIFRAGACEAE=, p. 49.

48c. Stamens and pistils each very numerous --49.

49a. Flowers white 64a, in =ROSACEAE=, p. 56.

49b. Flowers yellow 13a, in =RANUNCULACEAE=, p. 36.

--50--

50a. Leaves compound or deeply lobed --51.

50b. Leaves entire or toothed --54.

51a. Flowers in axillary racemes, spikes, or panicles
=URTICACEAE=, p. 23.

51b. Flowers terminal, or in terminal clusters --52.

52a. Flowers in umbels; leaves palmately compound
=ARALIACEAE=, p. 80.

52b. Flowers in racemes or spikes, or solitary --53.

53a. Leaves deeply pinnatifid; swamp plants with flowers in spikes or
solitary =HALORAGIDACEAE=, p. 79.

53b. Leaves lobed, or irregularly pinnately cut or dissected; weedy
plants with flowers in racemes 2, in =COMPOSITAE=, p. 114.

54a. Juice milky 3, in =EUPHORBIACEAE=, p. 67.

54b. Juice not milky or colored --55.

55a. Leaves whorled --56.

55b. Leaves all opposite --58.

56a. Aquatic or mud plants with erect stems
2a, in =HALORAGIDACEAE=, p. 79.

56b. Prostrate weedy terrestrial plants =AIZOACEAE=, p. 31.

56c. Erect or ascending terrestrial plants --57.

57a. Leaves more than 2.5 cm. long 4a, in =CORNACEAE=, p. 83.

57b. Leaves 2 cm. long or less 3a, in =PRIMULACEAE=, p. 87.

58a. Flowers in terminal or axillary spikes, racemes, or other
clusters --59.

58b. Flowers solitary or few in the axils of the leaves --61.

59a. Leav