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Keyed in multiple places:

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Key to Valerianaceae

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1 Stem leaves pinnately compound, with 3-21 leaflets
1 Stem leaves simple

Key R: herbaceous dicots with opposite, compound leaves on the stem

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1 Inflorescence an involucrate head subtended by phyllaries, heads solitary or many, variously arrayed in secondary inflorescences; fruit a cypsela
1 Inflorescence various, but not as above; fruit various, not as above.
  2 Leaves pinnately compound.
    3 Leaves even-pinnate
    3 Leaves odd-pinnate.
      4 Plants vines, climbing or sprawling, the leaves often with tendril like petioles and leaf rachises; corolla 4-parted, radially symmetrical
      4 Plants not vines, more or less erect to arching and lacking adaptations for climbing; corolla 5-parted, radially or bilaterally symmetrical
        5 Plants often with a mix of mostly opposite, deeply 3-lobed leaves or trifoliate leaves (leaves sometimes simple); flowers pink or purplish-white, axillary; plants annual
        5 Plants typically with all leaves with > 3 leaflets; flowers primarily white, borne in dense terminal corymbs/cymes; plants perennial
  2 Leaves palmately compound.
          6 Cauline leaves essentially sessile, and also palmately cleft to the base, and further lacerately divided into linear or oblanceolate segments
          6 Cauline leaves petiolate, with 3-5, sessile or petiolulate, ovate, elliptic, or obovate leaflets (these serrate and sometimes with additional lobes).
             7 Plants annual; flowers typically unisexual and not showy, green; plants highly resinous and glandular; inflorescences variously arranged
             7 Plants perennial; flowers radially symmetric, showy, variously colored; plants typically not strongly resinous or glandular; inflorescences terminal
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