Dryopteris filix-mas, Fern, bear’s paw, Knotty brake, Marginal fern

Male Fern supposedly got its common name from the shape of the creeping rhizome which, in some way looks like a bear’s paw. The genus name Dryopteris is derived from two Greek words, drys, meaning ‘tree’, and Pteris, meaning ‘fern’. Many members of this genus are commonly referred to as wood ferns. The species, filix-mas, is from the Latin filix meaning fern and mas meaning male in reference to the somewhat vigorous growing habits of ferns in this species. The plant was thought to be the male version of the common lady fern Athyrium filix-Femina being robust in appearance and vigorous in growth.

Male Fern Facts

Plant Description

Male Fern is a large, hardy, vigorous, semi-evergreen, clump-forming ornamental fern that normally grows up to 1-3 feet tall and almost equal spread. The plant is found growing in rich woods, glades, upland pastures, and hardwood to mixed forest, rocky groves, rocky grove slopes, cliff bases and rock fields, damp shaded areas in the understory of woodlands shady places on hedge-banks and screes. The plant is easily grown in average, medium moisture, well-drained soils. It prefers consistently moist, humusy soils that are rich in organic matter. Soils should not be allowed to dry out.

Rhizomes

Rhizome or tuber of the male fern is reddish-brown in color and is usually small, bulky and scaled. The rootstock or rhizome is short, stumpy and creeping, lying along the surface of the ground or just below it. From it’s under surface spring the slender, matted roots. The crown of the rhizome is a brown, tangled mass, with the hairy bases of the leaves, and in it is contained the mass of undeveloped fronds which, as they unroll, grow in a large circular tuft. The rhizome is brownish-black, ovoid-cylindrical pieces about 6-15cm long and 3-4 cm in diameter. The rhizome used is three to six inches long and with the closely imbricated and slightly curved remnants of the stipes two to three inches thick. The latter remains green for about a year after which it turns brown. The rhizome is fleshy, externally dark brown, internally pale green, and spongy. On the transverse section near the surface, eight larger fibrovascular bundles are arranged in an interrupted circle, outside of which are a number of smaller ones. The stipes have about eight small vascular bundles in a loose circle. The spongy texture is due to the thin-walled parenchyma and to the large intercellular spaces, into which stalked glands project which exudes a green liquid. The rhizome has a slight disagreeable odor and a sweetish afterward, somewhat bitter astringent, and nauseous taste.

Fronds

The plant bears insipid green leaves also known as fronds. Fronds are usually dark green in color. The blades are ovate to narrowly lanceolate, up to 12 inches wide, widest about 1/3 of the way up from the base, and gradually narrowing to a pointed tip. There is no visual difference between the fronds that have fertile sori and those that may not. There are no aromatic glands. Fronds are firm, not leathery, and die back in the fall, but may remain green overwinter. The central rachis is green with pale tan scales on the underside. The grooved stipe is quite short, forming less than 1/4 the length of the frond. The brown scales of the stipe are distinctive, being of two kinds – one hair-like and one broad. Fiddleheads emerge almost covered with the scales.

Pinnae

The pinnae are narrow and pointed to the tip with the basal pinnae much reduced in size. Pinnae are mostly in the plane of the blade, but young fronds can give the appearance of pinnae tilted upward from the blade plane, similar to those of the Crested Fern. Also, the lower Pinnae are shorter and somewhat tilted downward, similar to some other members of the Dryopteris. The division pattern is pinnate-pinnatifid and sometimes bi-pinnate near the base. On the rachis, the pinnae are not opposite each other but slightly offset. The upper side of the costa is grooved but the groove does not meet the groove on the rachis.

Pinnules

There will be 24+/- pairs of short pinnules on the pinnae. Margins of the pinnules are lobed and the lobes are slightly toothed, with pointed lobe tips at the end of the pinnule veins. There is no difference in the length of the adjacent basal pinnules.

The sori are on the upper half of the front, at the back of the pinnules, in round masses towards the base of the segments, covered with a conspicuous, kidney-shaped thin membrane. On the underside of the fronds, there are two rows of dark brown spores.

History of Male Fern

Male fern is native to the temperate climates of Asia, Europe, and much of South and North America. The plant is highly adaptable and can grow well in both arid and fertile soils. Root of the male fern, usually harvested in early autumn, is dried for therapeutic purposes. As far back as 103 A.D., Greek and Roman physicians used the male fern root to help expel harmful organisms from the intestines and digestive tract. In fact, it is rumored that Louis XVI of France paid large sums of money to add this powerful fern to his own medicine chest.

Traditional uses and benefits of Male Fern

• Male fern is one of the most popular and effective treatments for tapeworms.
• Root stalks are anodyne, antibacterial, infection?, or irritation, often causing pain?, swelling?, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation?, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।" data-rx-term="anti-inflammatory" data-rx-definition="Anti-inflammatory means reducing inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।">anti-inflammatory?, antiviral, astringent, febrifuge, vermifuge and vulnerable.
• Root consists of an oleoresin that paralyzes tapeworms and other internal parasites and has been used as a worm expellant.
• An oily purge, such as castor oil, increases the absorption of the fern-root and can be dangerous.
• Root is also taken internally in the treatment of internal hemorrhage, uterine bleeding, mumps, and feverish illnesses.
• The root is harvested in the autumn and can be dried for later use.
• Externally, the root is used as a poultice in the treatment of abscesses, boils, carbuncles and sores.
• Male fern has been used in traditional medicine as a vermifuge, with the early Greeks and Romans also recognizing the plant’s value in destroying or expelling parasitic worms.
• In Chinese medicine, the extract has been used to treat wounds, recurrent nosebleeds, and heavy menstrual bleeding.
• The components of the plant have also been used as veterinary vermifuges.
• Male Fern may support healthy blood lipid levels, benefits hair health, promotes bone health and healing, benefits joint health, may rid parasites such as tapeworms and supports healthy kidney function.

Culinary Uses

• Young fronds can be consumed after being cooked.
• It has a flavor resembling asparagus, broccoli and artichokes.
• The rhizomes can be eaten raw or cooked.
• They were eaten raw as part of a regime for losing weight.
• In times of great scarcity the Norwegians used the fronds to mix with bread and also made them into beer.

Other Facts

• Compost of fern leaves is very beneficial on tree seed beds, aiding germination.
• Ashes of the plant are rich in potash and have been used in making soap and glass.
• It is an effective ground cover plant.
• Although it is usually deciduous, its decaying fronds make good weed-suppressing mulch in the winter.
• The leaves, cut green and dried, make an excellent bitter, and when infused in hot water make good fodder for sheep and goats.
• Some veterinarians use male fern to treat worms in animals.

Precautions

• Large quantities can cause severe health problems.
• People with heart complaints should not be recommended this plant.
• It is highly toxic.
• It may cause Nausea?, pain? in the head or upper neck. সহজ বাংলা: মাথাব্যথা।" data-rx-term="headache" data-rx-definition="Headache means pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।">headache?, diarrhea? and dizziness.
• Avoid use during pregnancy and breast feeding.
• Do not consume more than 6-8 grams.
• Male fern also may increase jaundice?. সহজ বাংলা: জন্ডিসে বাড়তে পারে এমন হলুদ রঞ্জক।" data-rx-term="bilirubin" data-rx-definition="Bilirubin is a yellow pigment that can build up in jaundice. সহজ বাংলা: জন্ডিসে বাড়তে পারে এমন হলুদ রঞ্জক।">bilirubin? and albumin levels in the blood.
• Severe poisoning from the herb may cause respiratory failure, seizures, optic nerve pain?, heart failure, coma, and death.
• Don’t use male fern if you’re elderly or debilitated.
• Don’t give this herb to infants.
• Avoid male fern if you have anemia?, ulcers, or a disease of the heart, liver, or kidney.
• If you’re taking prescribed drugs to treat a liver condition, check with your health care practitioner before using male fern.

References