1. Concave on one side and convex on the other with the concavity being greater than the convexity

See also: concave

• aster
• Aster acuminatus
• Aster arenosus
• Aster cordifolius
• Aster divaricatus
• Aster dumosus
• Aster ericoides
• Aster falcatus
• aster family
• Aster linarifolius
• Aster linosyris
• Aster macrophyllus
• Aster novae-angliae
• Aster novi-belgii
• Aster ptarmicoides
• Aster shortii
• Aster tripolium
• Aster turbinellis
• Asteraceae
• astereognosis
• Asterias
• asteriated
• asterid dicot family
• asterid dicot genus
• Asteridae