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Solander's hair?

Acrostichum calomelanos

Acrostichum calomelanos

Is it the great Linnaean disciple Daniel Solander’s (1733-1782) hair that is stuck under the frond? Or even Linnaeus’?! This Pityrogramma calomelanos was collected on Jamaica in the 18C, perhaps by Patrick Browne (1720-1790). It is a widely cultivated and naturalized species (“first colonizer of erupted volcanoes in Mex.”), used as ornamental. Mabberley (The Plant Book) also says “spore-prints used as face-paint in NG, local medic. incl. malaria”.

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