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. 2022 Nov 8;12:18956. doi: 10.1038/s41598-022-23442-z

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Starch grains of identified taxa recovered in the samples analyzed, viewed in transmitted and cross-polarized light. (A)–(B) Potential okra from B85 P1 0–58 cm (Sherd 1); (C)–(D) Vigna subterranea from B85 F P2 66 cm (Sherd 1); (E)–(D) Cucumeropsis sp. from C19 F1 0–30 cm; (G)–(H) Raphia sp. from C19 F2 P2 0–30 cm (Sherd 1); (I)–(J) Coula edulis from C19 F3 P1 deblais (Sherd 1); (K)–(L) pearl millet B85 F P2 66 cm (Sherd 2); (M)–(N) sorghum from C19 F3 P1 deblais (Sherd 2); (O)–(P) tuber (small type) from C19 F2 P2 0–30 cm (Sherd 1); (Q)–(R): tuber (large type) from C19 F3 P1 deblais (Sherd 2). Photos C. Cagnato.