Extracellular signal peptide that regulates cell fate. Represses root apical meristem maintenance. Regulates the transition of protophloem cells from proliferation to differentiation, thus impinging on postembryonic growth capacity of the root meristem; this signaling pathway requires CRN and CLV2 (PubMed:28607033). Mostly expressed in seedlings, roots and siliques, and, to a lower extent, in leaves, flowers, stems and apex. The O-glycosylation (arabinosylation) of the hydroxyproline Pro-94 enhances binding affinity of the CLE11p peptide for its receptor. Belongs to the CLV3/ESR signal peptide family.