By publishing his "Deutschlands Flora" in a minute format (measuring only 13-15 cm), Sturm was able to make his German flora, containing 2472 engravings, less expensive & thus available to as many people as possible. Find it in https://t.co/5ivqMo7EOW

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New to "Filices Britannicae" (1785-90), an illustrated account of British ferns by James Bolton https://t.co/IwERYroVKP

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