Illustration of a Isoetes lacustris (lake quillwort or Merlin's grass)
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Antique Botany Illustration: Selaginellaceae, Isoetes hystrix
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Antique Botany Illustration: Selaginellaceae, Isoetes lacustris
Antique illustration (1898): Quillwort, Isoetes lacustris
![Quillwort Plant (Isoetes) Megasporangia, Microsporangia Cross Sections and Spores - 19th Century Quillwort plant (Isoetes) full plant [middle], microsporangia vertical cross section [left top], magnification of three megaspores [left middle], megasporangia vertical cross section [left bottom], microsporangia horizontal cross section [right]. Vintage etching circa 19th century. isoetes stock illustrations](https://media.istockphoto.com/id/1431754155/vector/quillwort-plant-megasporangia-microsporangia-cross-sections-and-spores-19th-century.jpg?s=612x612&w=0&k=20&c=J7d7f2Rd-RwZRgBupGWdiyn92McMgWlP5v1lvaV4TQU=)
Quillwort plant (Isoetes) full plant [middle], microsporangia vertical cross section [left top], magnification of three megaspores [left middle], megasporangia vertical cross section [left bottom], microsporangia horizontal cross section [right]. Vintage etching circa 19th century.
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