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.
Click images to enlarge and show more photo credit.
Key to Holcus
Poaceae
Holcus
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=39775
1 Plant not rhizomatous; upper culm internodes velvety-villous; lemma awn 1-2 mm long, recurved as a hook
1 Plant strongly rhizomatous; upper culm internodes glabrous; lemma awn 3-5 mm long, straight or geniculate