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Key to Oryza
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=41162
1 Spikelets persistent; lemmas usually unawned; mature grains brown, tan or white-colored; plants usually cespitose annuals (rarely perennial); [common non-native in MS river floodplain and w. Gulf coastal plain, scattered as a waif eastwards] | |
1 Spikelets deciduous; lemmas awned; mature grains reddish-brown to dark-red; plants cespitose or rhizomatous, annual or perennial; [uncommon non-native, s. FL] |