Monday, January 5, 2015

Oak Fern

Gymnocarpium dryopteris
A rhizomatous perennial, reaching up to 1 foot in height, that is a widespread native to temperate regions of Eurasia and North America ( from near Nome, Alaska to far northern Yukon to Great Slave Lake, Northwest Territories to The Pas, Manitoba to Moosonee, Ontario to central Quebec to Newfoundland & Labrador; south to Oregon to Montana to South Dakota to northern Iowa to central Ohio to Maryland ). It is found in coniferous or mixed woodland in the wild. It has declined considerably in southern Ontario; common around Windsor before 1900.
The deciduous, broad-triangular fronds, up to 10 inches in length, are bright green.
Hardy zones 1 to 7 in partial to full shade on moist, cool, humus-rich, acidic soil.


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