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The Slime Moulds of Eastern Iowa by Minna Pryce Humphreys, 1891

The Slime Moulds of Eastern Iowa by Minna Pryce Humphreys, 1891, Page 29

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is nearly smooth, the other half reticulated. Often instead of being spinulose the spores are smooth and have peculiar markings as on some pollen grains. (Trichia chrysosperma.) The rupture of the wall of the sporangium is accomplished in several
 
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