|
Ferns and Horsetails
Basic Description: Flowerless green plants reproducing
via spores, not seeds (seeds carry their own nutrients to enable
germination, spores carry no nutrients and rely on outside resources
for germination). New fronds emerge each spring, starting out
as "fiddlehead" buds seeming to unroll as they grow
and mature. Most ferns prefer shady and damp areas. They range
from sea level up to 10,000 feet altitude. Ferns are found in
many sizes from a few inches to several feet tall. Often many
species intermixed in close proximity. This section includes Horsetail,
even though technically it is not a fern.
Anatomy: The major part of the fern seen above ground
is called the "Frond". Most ferns have many fronds emerging
from a common set of roots. The components of a frond are:
Local ferns are found in three basic forms: Once pinnately compound,
where the main stem is the pinna with pinnules growing directly
on that main stem (examples are Western Swordfern, Deer Fern and
Licorice Fern); twice pinnately compound, where the pinnules grow
out of secondary stems (examples are Lady Fern, Maidenhair Fern
and Wood Fern); and thrice pinnately compound, where the pinnules
grow on a tertiary stem (example is the Bracken Fern). Illustrations
are provided with the description of each specific specie.
History: Ferns have been around for a long
time. Fossils, as old as 400 million years (the Devonian period)
have been found. Ferns flourished later in the Carboniferous period
(300 to 350 million years ago) when the Earth's climate was warm
and vast forests of gigantic ferns and horsetail covered the land
masses. Decomposition of these fern forests created large underground
liquid petroleum deposits. Today we are using these ancient plants
to fuel our automobiles in the form of gasoline.
ALPINE LADY FERN
|
Fern Family
Athyrium distentifolium
The alpine lady fern prefers wet talus slopes, rocky hillsides, and
subalpine meadows, from mid-elevations to 10,000 feet. It is smaller than
the lady fern (A. filix-feminina), reaching a height of 8-32".
Lance-shaped fronds, doubly or trebly compound, range from 6" x 1" to 22"
x 10" in size. Short-stalked, triangular pinnae are more finely dissected
than those of the lady fern. Distribution includes the Pacific
Northwest and much of the Rockies, stretching north to Alaska. It is also
found in Greenland, Newfoundland, and the Yukon, with relatives in Europe
and Japan. Taxonomy for this plant is in dispute. It is named either A.
distentifolium or A. alpestre, and the American plant is alternately
called a subspecies or a variety.
|
BRACKEN FERN
|
Fern Family
Pteridium aquilinum
Widespread and variable throughout the Western
U.S. and Canada, extending from the coast to the desert at altitudes
of sea level to 10,000'. Bracken Ferns like open sunny areas and
partial shade in soft soil where the roots can penetrate. Bracken
ferns grow as single fronds ranging from 3' to 7' in height. A
distinguishing feature is that pinnae appear on the third branch
as illustrated. These are very invasive and hardy fellows, almost
impossible to eradicate. The deep root system is almost immune
to forest fires. As children, we used the primary stipe, stripped
of all branches, as spears in mock battles.
|
COMMON HORSETAIL
|
Horsetail Family
Equisetum arvense
Horsetail is easily recognized by the vertical, jointed, hollow stems (up
to 1/2" diameter). Sterile stems have several long, narrow leaves
growing like fringes all around the circumference at each joint. Fertile
stems are not similarly fringed, but have a cone like growth at the top
which holds the spores. They grow abundantly in all kinds of soil from sea
level to 8,500'. Common Horsetail is one of the most widespread plants in
the world and is frequently a gardener's nightmare - almost impossible to
eradicate. Horsetails have a long history, dating back to the Devonian
period (400 million years ago). Because of their rough texture they were
commonly used throughout the ancient world for scouring cooking vessels.
Horsetail was one of the first plants to reappear after the Mt. St. Helens
eruption in 1980.
|
COMMON SWORD FERN
|
Fern Family
Polystichum munitum
Very common in shady, damp, rich woods from sea level to 2,500'
throughout western parts of Washington, Oregon, British Columbia and
northern California. Grow in large, dense clumps 2 to 3 feet high. Once
pinnately compound, distinguished by pinules growing directly out of
primary stem starting near the base. Named because profile of each frond
is shaped something like a medieval broadsword; wide at the base,
tapering to the tip. As in most ferns, clusters of brownish spores
accumulate on the back side. If you notice that the tips of fronds are
missing, that is a sign that a colony of Mountain Beaver lives nearby.
Sword Ferns and Stinging Nettle are the Mountain Beaver's choice foods.
Native Americans used Swordferns for mattresses and to line floors and
fire pits.
|
DEER FERN
|
Fern Family
Blechnum spicant
Found throughout low, sea level to 2,000', coastal regions in moist
forests. Deer Ferns have two types of fronds. Both types grow together out
of common root clumps. Sterile fronds up to 2' long. Pinnules
grow directly on the main stem, starting near the base. The pinnules are
short at the base of the frond, lengthen at the center and taper back to
the tip. The sterile fronds usually lie relatively flat to the ground and
contain no spores on their back side. Fertile fronds which
have widely spaced narrow pinules, are taller and more erect than the
sterile fronds. The back side are covered with spores. Deer ferns
were used by natives to sooth skin sores, a practice learned by watching
deer rub their antler stubs after the antlers fell off.
|
LADY FERN
|
Fern Family
Athyrium filix-femina
Delicate, pale green fronds have diamond shaped profiles (pinnules are
short at the base, getting longer at the center then tapering off toward
the tip). They can reach heights over 5'. They grow in moist forests,
swamps and thickets where the soil is soft to allow root penetration at
all altitudes from sea level to 6,000'. The fronds will look ragged and
worn out by early fall. Aboriginal people used Lady Ferns for covering
berries while drying. Name "Lady Fern" derived from profile -
narrow at the ankles and shoulders, wide at the hips.
|
LICORICE FERN
|
Fern Family
Polypodium glycyrrhiza
These small ferns rarely grow larger than 2.5'. They like logs and wet
mossy ground from sea level to 2,000'. A favorite habitat is aloft growing
on tree trunks or limbs. Look for Licorice Ferns on branches of the Big
Leaf Maple in shady lowland forests. Fairly broad pinnules grow along the
primary stem to form once-pinnate fronds. The name is derived from
licorice flavored rootlets. Several local Native American tribes chewed
these rootlets for flavor and used them as medicine for colds and sore
throats.
|
MAIDENHAIR FERN
|
Fern Family
Adiantum pedatum
These ferns are unique in structure having a dark vertical stem (stipe)
which branches out fan like into several pinna which are nearly
horizontal. They are 1' to 2.5' tall; like rocky, shady, moist areas from
sea level to 10,000'. Look for them along streams or in the spray zone of
waterfall. Maidenhair Ferns were once exported and used by herbalists as
cough medicine. Native Americans used the delicate black stipe to decorate
baskets. The name was derived from the black, glossy, hair-like stalks or
from the masses of dark root hairs.
|
WOOD FERN
|
Family
Dryopteris austriaca
Fronds have a triangular profile, pinules long at the base of the pinna
tapering off to points at the tip.The stipes are long and scaley. Erect
fronds may reach over 3' tall and grow in clusters. They like to grow in
moist, richly soiled forests and openings and on scree slopes from sea
level to 1,500' elevation. Rootstocks resemble a pineapple and were often
eaten as a starchy food source.
|
CAUTION: Do not attempt to eat any wild plants or berries until
you have thoroughly checked to determine if they are safely edible.
BIBLIOGRAPHY:
-
"A Field Guide to the Cascades & Olympics", Stephen
R. Whitney, 1983.
-
"Mountain Flowers of the Cascades & Olympics", Harvey
Manning, Bob Spring and Ira Spring, 1979.
-
"Mosses, Lichens & Ferns", Dale H. Vitt, Janet E.
Marsh and Robin B. Bovey, 1988.
-
"Pacific coast Fern Finder", Glenn Keator and Ruth M.
Heady, 1981.
-
"Plants of the Pacific Northwest Coast", Jim Pojar
and Andy MacKinnon, 1994.
-
"Trees, Shrubs & Flowers to Know in Washington &
British Columbia", C.P.Lyons & Bill Merilees.
Photos and text have been contributed by:
Gary Stock,
Carol Madison,
Rich Baldwin,
and
Bill Sunderland.
If you would like to contribute to our Online Flora
and Fauna Guide please email us at
web@wta.org. Please send scanned images as attached
.JPG files in the 40-80Kb range. Close-ups that show details of
indiviudal flowers, berries, leaves or cones are preferred. All
photos and text must be originals!
|
|