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Pacific Northwest Ferns
There are at least fourteen Pacific Northwest fern species on the Tree Garden.
The fossil record shows that ferns evolved after horsetails and before conifers.
Historically they grew to be the largest land plants of the time because they
developed trunks and leaves (fronds). Some are suited for dry locations, some for wet.
Western sword fern Polystichum munitum |
Anderson's sword fern Polystichum andersonii |
Spiny wood fern (Shield fern) Dryopteris expansa |
Toothed wood fern? Dryopteris carthusiania |
Lady fern Athyrium filix-femina cyclosorum |
Giant Chain fern Woodwardia fimbriata |
Nevada Swamp fern ? Thelypteris nevadensis |
Oak fern Gymnocarpium dryopteris |
Western maiden hair fern Adiantum aleuticum |
Maindenhair spleenwort? Asplenium trichomanes |
Bracken fern Pteridium aquilium |
Deer fern Blechnum spicant |
Licorice fern Polypodium glycyrrhiza |
Leather Polypodium Polypodium scoulerii |
updated 9/1/2007 by Allen Philips