Probable transcription factor (By similarity). Seems to promote cell differentiation (PubMed:25564655). Interacts with AIL7/PLT7, ANT, BBM and AIL1. Expressed in siliques. In plants missing HDG3, HDG7, HDG11, PDF2 and ATML1, increased cell division leading to cell overproliferation. Belongs to the HD-ZIP homeobox family. Class IV subfamily.