70. Leaves with 3 to 5 leaflets [71] 70. Leaves with more than 5 leaflets [72]
71. Stems trailing, usually on the ground dewberries [235] 71. Stems climbing prairie rose (rare) [233]
72. Thorns long, often branched honey locust [243] 72. Thorns or prickles short [73]
73. Leaflets ovate and with odd leaflet at tip prickly ash [246] 73. Leaflets oblong and without odd leaflet at tip mesquite [240]
74. Vines [75] 74. Not vines [78]
75. Leaves twice-pinnately compound pepper vine [263] 75. Leaves palmately compound or with 3 leaflets [76]
76. Three leaflets [77] 76. Five or more leaflets Virginia creeper [262]
77. Leaves succulent (thick and juicy), sometimes three-lobed instead of parted cow-itch vine (rare) [264] 77. Leaves not succulent, leaflets always fully parted, plant often shrubby when young poison oak or poison ivy [251]
78. Leaves twice-pinnately compound chinaberry [248] 78. Leaves not twice-pinnate [79]
79. Three leaflets (sometimes 5 on wafer ash) [80] 79. More than 3 leaflets [82]