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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 Oplismenus

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1 Awns antrorsely scabrous
1 Awns glabrous and viscid (when fresh).
  2 Leaf sheaths and culm axis pilose with hairs 3-5 mm long; hairs on leaf surfaces also 3-5 mm long; leaves 2.5-10 cm long; longest leaves with long-acuminate tip; lemma 7-veined
  2 Leaf sheaths and culm axis glabrate to pilose (usually sparsely, but dense at sheath summit) with hairs < 1.5 mm long; hairs on leaf surfaces also < 1.5 mm long; leaves 1.5-6 cm long; longest leaves with acute to acuminate tip (but not long-acuminate); lemma (7-) 9-11-veined.
    3 Lowest raceme rachis 13-23 mm long; [s. FL]
    3 Lowest raceme rachis < 11 mm long; [widespread in our region]
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