Tosefta על פסחים 112:2

[With respect to] a homeowner that gave peah to the poor, he has no right to say to them, "Take the seeds and give me the flax-stalks," [or] "Take the dates and give me the upper palm branches" (=מכבדות, see Pes. 56b:3, following Steinsaltz). [If] they (i.e., the produce) fell and afterwards he designated them for peah, he is not liable [in the laws of] peah except as to the seeds. [?]