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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 Poaceae, Key A: bamboo grasses (woody trees and shrub grasses) (tribe Bambuseae)

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1 Rhizomes pachymorph, having root-bearing internodes thicker than the culm; culms usually in single clumps
1 Rhizomes leptomorph, root-bearing internodes thinner than the culm; culms solitary or in many connected clumps.
  2 Mid-culm branches consistently 2, unequal, rarely with a smaller central third branch
  2 Mid-culm branches not consistently 2, initially 1-9.
    3 Dwarf bamboos, < 1 (-1.5) m tall.
      4 Leaf blade margins not or only slightly bleached in winter, terminal blade parallel to shoot axis, blades often variegated
      4 Leaf blade margins more or less bleached in winter, terminal blade often angled from shoot axis, blades usually not variegated
    3 Medium-stature to tall bamboos, > 1 m tall.
        5 Mid-culm branches initially 5-9
        5 Mid-culm branches initially 1-3 (-5).
          6 Mid-culm branches (1-) 2-7; branches and leaves small to medium relative to culm size; [native]
          6 Mid-culm branches 1 (-3); branch and leaves often very large relative to culm size; [exotic].
             7 Leaf blade margins not bleached in winter, terminal blade parallel to shoot axis; culm buds initially open or closed
             7 Leaf blade margins bleached in winter, terminal blade often deflexed from shoot axis; culm buds initially closed
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