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Keyed in multiple places:

Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Erythrostemon

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1 Perennial from a woody caudex, stems 2-5 dm tall; leaflets 0.9-1.6× as long as wide; terminal pinna with about 2× as many leaflet pairs (8-20) as the lateral pinnae (3-7)
1 Small trees or shrubs (sometimes straggling), stems 2-100 dm tall; leaflets 1.2-2.5× as long as wide; terminal pinna with about the same number of leaflet pairs as the lateral pinnae.
  2 Lateral pinna pairs 8-12 per leaf; leaflets 7-11 per lateral pinna
  2 Lateral pinna pairs 2-4 per leaf; leaflets 2-5 per lateral pinna.
    3 Shrub or tree, to 100 dm tall; leaflets 3-5 per lateral pinna; leaflets 8-20 (-25) mm long
    3 Scandent or straggling shrub, 2-5 dm tall; leaflets 2-3 per lateral pinna; leaflets 3-10 mm long

Key to Fabaceae, Key F: herbaceous legumes with bipinnate leaves [subfamily Mimosoideae]

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1 Leaves with an odd number of pinnae (lateral pinnae paired, but an additional pinna present in a terminal position on the rachis); [Caesalpinoideae].
  2 Leaflets 0.9-1.6× as long as wide; terminal pinna with about 2× as many leaflet pairs (8-20) as the lateral pinnae (3-7)
  2 Leaflets 1.8-4× as long as wide; terminal pinna with about the same number of leaflet pairs as the lateral pinnae.
    3 Lower surfaces of leaflets eglandular
    3 Lower surfaces of leaflets densely glandular punctate, the glands orange when fresh and drying black
1 Leaves with an even number of pinnae (lateral pinnae paired).
      4 Coarse climbing or sprawling suffruticose herbs, the stems to 6 m long, and usually armed with retrorsely curved prickles; [Caesalpinoidaeae]
      4 Perennial herbs, less coarse; [Mimosoideae]
        5 Stamens > 10; [tribe Acacieae]
        5 Stamens 10 or fewer; [tribe Mimoseae].
          6 Petiole with 1-several glands; stems ascending to erect; flowers greenish-white
          6 Petiole without glands; stems prostrate to weakly arching; flowers pink-purple, yellow, or greenish-yellow.
             7 Flowers pink-purple; legume ribbed, the ribs with prickles
             7 Flowers yellow to greenish-yellow; legume not ribbed or prickly