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Key to Lachnocaulon

Eriocaulaceae

Lachnocaulon

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1 Trichome at the tips of the receptacular bract milky white, opaque, the head therefore appearing gray to white, obscuring the brown color of the bractlet.
  2 Mature heads 4-7 mm across; seeds obviously longitudinally striate (as seen at 10× magnification); scape pilose throughout
  2 Mature heads 3.5-4 mm across; seeds not obviously longitudinally striate, the striations obscure and very fine (not visible at 10× magnification); scape glabrous (or nearly so) distally
1 Trichome at the tips of the receptacular bract translucent, the head therefore showing the brown color of the bractlet.
    3 Scape glabrous (or with a few trichome).
      4 Leaves 0.5-1 (-2) cm long; head gray or gray-brown, usually globose; carpel 2
      4 Leaves 2-3 cm long; head reddish- or dark brown, usually elongate-cylindric; carpel 3