Leaves ovate-oblong, attached by the base
1a, in =CELASTRACEAE=, p. 69.

65b. Leaves almost round, peltate near the edge =MENISPERMACEAE= p. 40.

66a. Leaves opposite --67.

66b. Leaves alternate --84.

67a. Leaves compound --68.

67b. Leaves simple --69.

68a. Leaflets 3 =STAPHYLEACEAE=, p. 69.

68b. Leaflets 7 or more 1a, in =CAPRIFOLIACEAE=, p. 109.

69a. Leaves palmately veined, or at least with a pair of prominent
lateral veins from the base --70.

69b. Leaves pinnately veined --72.

70a. Leaves not lobed 1b, in =RHAMNACEAE=, p. 71.

70b. Leaves more or less lobed --71.

71a. Leaves with stipules 22a, in =CAPRIFOLIACEAE=, p. 111.

71b. Leaves without stipules 2a, in =ACERACEAE=, p. 70.

72a. Leaves serrate --73.

72b. Leaves entire --77.

73a. Stem thorny 1b, in =RHAMNACEAE=, p. 71.

73b. Stem not thorny --74.

74a. Bark of the ripe twigs green 1b, in =CELASTRACEAE=, p. 69.

74b. Bark of the ripe twigs brown, reddish, or gray --75.

75a. Twigs with a prominent hairy ridge extending downward from the
middle of the line connecting the petiole bases
13a, in =CAPRIFOLIACEAE=, p. 110.

75b. Twigs without any pubescent ridge --76.

76a. Erect shrubs; leaves obviously toothed
11b, in =CAPRIFOLIACEAE=, p. 110.

76b. Spreading shrubs; most of the leaves entire, and only here and
there some with serrate margins
18b, in =CAPRIFOLIACEAE=, p. 110.

77a. Leaves silvery beneath with a dense coating of scales
=ELAEAGNACEAE=, p. 77.

77b. Leaves green beneath, or somewhat hairy and light-colored --78.

78a. Aquatic plant with lanceolate leaves, and stems bending over
and into the water 1a, in =LYTHRACEAE=, p. 77.

78b. Not truly aquatic, although frequently in wet places --79.

79a. Leaves evergreen, as shown by their presence on the older stems
18a, in =ERICACEAE=, p. 85.

79b. Leaves deciduous each year --80.

80a. Leaves dotted with translucent dots, easily seen when the leaf
is held to the light