Minggu, 29 Januari 2012

Green in Winter: Christmas Fern

Polystichum acrostichoides grows in a variety of woodlands and is especially at home on north and east facing slopes. The acrostic fertile portion of the blade normally withers away after sporulation, so it is only occasionally visible in winter (acrostic = densely fertile, as in Acrostichum, a tropical fern genus) .

This attractive, native fern has blades that are coriaceous (thick and leathery), stipes (lower stems) that are densely scaly, and pinnae (side branches) with auricles (ears) near their proximal end (nearest the point of attachment).

Photographed on December 24, 2011 at Potato Creek State Park, St. Joseph County, Indiana


"A beautiful form has as much life at one season as another."

Henry David Thoreau

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