Comparison Chart for Species of Poa
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Character
presence of bulblets
absent
present
absent
absent
callus
typically glabrous
sparsely cobwebby hairs
to glabrouswoolly
glabrous
rachilla pubescence
glabrous
not applicable
glabrous
glabrous or
sparsely hairylemma vein appearance
multiple veins
distinctly ribbednot applicable
only midvein
distinctly ribbedonly midvein
weakly ribbed