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Key to Thalia
Marantaceae
Thalia
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=39590
1 Flowers crowded on the rachis, the zigzag internodes 2-3 mm long; leaves pilose at the base on the upper surface; bracts of the inflorescence white-pruinose
1 Flowers separated on the rachis, the zigzag internodes 5-10 mm long; leaves glabrous at the base on the upper surface; bracts of the inflorescence green or purple, not pruinose