Abstract Nardoo (scientific name Marsilea spp.) is a small freshwater fern, common across semi-arid and arid Australia. While reported as an important starchy food, albeit requiring complex processing in some regions, it is not well known as a food source in the Pilbara of Western Australia. Here we describe plant residues including megaspores, starch grains, cellulose, and fibres on a portable grinding stone from the surface of a rockshelter in the West Angelas region of the Central Pilbara. These residues display physical characteristics that strongly suggest they derive from nardoo. Given these findings, we encourage researchers to consider nardoo processing and consumption in future ethnobotanical and archaeological studies in the Pilbara. Abbreviations LW: Lynley Wallis; BS: Birgitta Stephenson; PSR: Picro Sirius Red; BIF: banded ironstone formation

中文翻译：

---

Nardoo在西澳大利亚州皮尔巴拉（Pilbara）的一个岩石棚中加工磨石

摘要Nardoo（科学名称为Marsilea spp。）是一种小型淡水蕨类植物，常见于半干旱和干旱的澳大利亚。尽管它是重要的淀粉食品，尽管在某些地区需要复杂的加工过程，但在西澳大利亚州的皮尔巴拉（Pilbara）却不是众所周知的食物来源。在这里，我们从中部皮尔巴拉中部西安吉拉斯地区的岩石棚表面上的便携式磨石上描述了植物残渣，包括大孢子，淀粉粒，纤维素和纤维。这些残渣显示出物理特征，强烈暗示它们源自nardoo。鉴于这些发现，我们鼓励研究人员在皮尔巴拉（Pilbara）今后的民族植物学和考古学研究中考虑纳多加工和食用。缩写LW：Lynley Wallis；BS：Birgitta Stephenson；PSR：Picro Sirius Red；BIF：