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Key to Lachnocaulon

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Show caption*© Jay Horn 1 Trichomes at the tips of the receptacular bracts milky white, opaque, the head therefore appearing gray to white, obscuring the brown color of the bractlets.

Show caption*© Scott Ward   2 Mature heads 4-7 mm across; seeds obviously longitudinally striate (as seen at 10× magnification); scapes pilose throughout  Lachnocaulon anceps

Show caption*© Jay Horn, some rights reserved (CC BY), uploaded by Jay Horn   2 Mature heads 3.5-4 mm across; seeds not obviously longitudinally striate, the striations obscure and very fine (not visible at 10× magnification); scapes glabrous (or nearly so) distally  Lachnocaulon beyrichianum

Show caption*© Jay Horn 1 Trichomes at the tips of the receptacular bracts translucent, the head therefore showing the brown color of the bractlets.

Show caption*© Jay Horn     3 Scape with ascending hairs  Lachnocaulon minus

Show caption*© Jay Horn     3 Scape glabrous (or with a few trichomes).

Show caption*© Edwin Bridges       4 Leaves 0.5-1 (-2) cm long; head light brown, usually globose; carpels 2  Lachnocaulon digynum

Show caption*© Jay Horn       4 Leaves 2-3 cm long; head reddish- or dark brown, usually elongate-cylindric; carpels 3  Lachnocaulon engleri