Your search found 2 image(s) of sepals and bracts of Bindweed and Morning Glory.
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Appalachian Bindweed,
Convolvulus species 2
Here ssp. appalachiana has strongly keeled bracts with overlapping bases, per Key to the Bindweeds (Calystegia/Convolvulus, Convolvulaceae) of Alabama and adjacent states (Spaulding, 2013).
Common Morning Glory,
Ipomoea purpurea
Ipomoea has no bracts below calyx, whereas Calystegia and Convolvulus do, per Wildflowers of the Southern Mountains (Smith, 1998).