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Keyed in multiple places:

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Key to Araliaceae

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1 Plant a woody vine; [subfamily Aralioideae; tribe Schefflereae]
1 Plant an herb, shrub, or tree.
  2 Leaves simple, peltate or cordate, roundish (if lobed, with 3-5 rounded lobes), 0.3-10 cm wide; rhizomatous, creeping herbs; [subfamily Hydrocotyloideae]
  2 Leaves either compound with 3-many leaflets or simple and then with 5-15 pointed lobes, > 10 cm wide; herbs, shrubs, or trees.
    3 Leaves simple, palmately-lobed; [subfamily Aralioideae; tribe Schefflereae].
      4 Leaves 5-7-lobed (the lobes not themselves sublobed); tree, the branches armed with prickles
      4 Leaves 7-15-lobed (the lobes themselves either sublobed or not); robust herb to shrub, the branches unarmed.
        5 Leaves 7-9-lobed (the lobes not sublobed); ovary 5- or 10-carpellate; leaf blades glabrous beneath at maturity
        5 Leaves 9-15-lobed (some of the lobes sublobed); ovary 2-carpellate; leaf blades densely pubescent beneath at maturity
    3 Leaves compound.
          6 Leaves 2-3× compound, at least the final order of division pinnate; leaves either 1 from a subterranean stem or 2-many, alternate on an aboveground stem; inflorescence compound, consisting of (2-) 3-many umbels, either on a separate peduncle from the rhizome or in a terminal panicle or raceme of umbels; fruit purple or black; [subfamily Aralioideae; tribe Aralieae]
          6 Leaves 1× palmately compound, leaflets 3-7; leaves 3-5 in a whorl at the summit of the stem (Panax) or many, clustered on spur shoots (Eleutherococcus); inflorescence of a single, simple umbel borne terminally on the stem; fruit red to yellow (Panax) or black (Eleutherococcus).
             7 Plant a shrub, with prickles; fruit black; [subfamily Aralioideae; tribe Schefflereae]
             7 Plant an herb, lacking prickles; fruit red or yellowish-green; [subfamily Aralioideae; tribe Aralieae].
               8 Leaflets 3 (-5), sessile or subsessile, the petiolules 0-3 mm long; larger leaflets 4-8 cm long, 0.5-2.5 cm wide, averaging about 2.5× as long as wide, the apex obtuse to acute; fruit yellow-green when ripe, longitudinally winged and ribbed in ×-section; petals white (rarely tinged with pink); inflorescence nodding in bud; underground storage organ a spherical tuber
               8 Leaflets (3-) 5, petiolulate, the petiolules (7-) 10-25 mm long; larger leaflets 6-15 cm long, 3.5-7 cm wide, averaging about 1.8× as long as wide, the apex acuminate; fruit bright red when ripe, smoothly elliptical in ×-section; petals light green; inflorescence erect in bud; underground storage organ an elongate root, this vertical or horizontal, and sometimes branched

Key G2: woody plants with alternate, simple, palmately lobed leaves

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1 Lianas.
  2 Lianas climbing by adventitious roots
  2 Lianas climbing by twining or by tendrils.
    3 Lianas climbing by twining
    3 Lianas climbing by tendrils.
      4 Tendrils branched, leaf-opposed; leaves mostly 5-7-lobed, the margins also serrate or dentate
      4 Tendrils simple (though paired in Smilax in SMILACACEAE), axillary; leaves 3-lobed, the margins entire, serrulate, or prickly.
        5 Leaves longer than wide, entire or prickly-margined; stems usually obviously armed with prickles; flowers 6-merous, greenish, in umbels borne in leaf axils; tendrils stipular, 2 per leaf axil, adnate to the petiole basally
        5 Leaves wider than long, entire or serrulate; stems not armed; flowers 5-merous, blue-purple or yellow, solitary or in small fascicles in leaf axils; tendrils 1 per leaf axil
1 Trees or shrubs. {add: Vernicia in EUPHORBIACEAE, Firmiana in MALVACEAE, Kalopanax in ARALIACEAE, Ficus in MORACEAE}
          6 Trees.
             7 Leaves > 3 dm long and wide; tree monopodial, with a single, unbranched stem (rarely with a few branches).
               8 Leaf lobes > 15, not sublobed; venation of each lobe parallel; fruit a drupe, with 1 seed; [Monocots]
               8 Leaf lobes < 13, most of these sublobed; venation of each lobe pinnate; fruit either a many-seeded berry or a single-seeded nutlet; [Eudicots].
                 9 Petiole attachment marginal; leaf lobes mostly sublobed; fruit a large berry, with many seeds
                 9 Petiole attachment peltate; leaf lobes not sublobed; fruit an nutlet, single-seeded
             7 Leaves < 3 dm long and wide; tree branching; [Eudicots].
                   10 Leaves 2-lobed (deeply notched at the apex, each lobe separated by the midvein, asymmetrical; [peninsular FL and s. TX]
                   10 Leaves 3-5 (-7) lobed; [collectively widespread].
                     11 Leaf blades (3-) 5 (-7) lobed, to 15 cm wide and long, each lobe finely serrate-crenate (>3 teeth per cm of margin) and rarely with a small sub-lobe; multiple fruit spherical and spiky, consisting of multiple bird-beak-like loculicidal capsules; buds axillary
                     11 Leaves 3 (-5)-lobed, to 35 cm wide and long, each lobe coarsely toothed or sublobed, the teeth or sublobes (at most 1-2 per cm of margin) attenuate-acuminate; multiple fruit spherical and merely rough on the surface, consisting of multiple achenes with tawny bristles; buds infrapetiolar (completely hidden in the swollen petiole base)
          6 Shrubs.
                       12 Leaf lobe margins entire (or undulate to sublobed at the tip)
                       12 Leaf lobe margins serrate.
                          13 Leaves glabrous
                          13 Leaves pubescent (slightly or strongly).
                            14 Pubescence of simple hairs; plants armed or not with nodal spines
                              15 Leaves 10-30 cm long and wide; fruit a berry; inflorescence of solitary to a few flowers, or a raceme
                              15 Leaves 2-10 cm long and wide; fruit an aggregate of drupelets; inflorescence a cyme
                            14 Pubescence of stellate hairs; plants unarmed.
                                16 Leaves < 15 cm wide
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