Erythronium americanum, Yellow adder’s tongue, Yellow trout lily

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Erythronium americanum, commonly called yellow adder’s tongue, yellow trout lily, is a small yellow wildflower belonging to the Lily family (Liliaceae) – a family which also includes Clintonia, Indian Cucumber-root, and Rose Twisted Stalk.  The Trout Lily is one of two plants in the Erythronium...

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Article Summary

Erythronium americanum, commonly called yellow adder’s tongue, yellow trout lily, is a small yellow wildflower belonging to the Lily family (Liliaceae) – a family which also includes Clintonia, Indian Cucumber-root, and Rose Twisted Stalk.  The Trout Lily is one of two plants in the Erythronium genus that occur in New York State. The plant is native to Eastern part of the US and Canada, from...

Key Takeaways

  • This article explains Trout Lily Facts in simple medical language.
  • This article explains Trout lily Scientific Classification in simple medical language.
  • This article explains Plant Description in simple medical language.
  • This article explains Traditional uses and benefits of Trout lily in simple medical language.
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  • Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
  • New weakness, severe pain, high fever, or symptoms after a serious injury.
  • Any symptom that feels urgent, unusual, or unsafe for the patient.
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Emergency now

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2

See a doctor

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Definition

Erythronium americanum, commonly called yellow adder’s tongue, yellow trout lily, is a small yellow wildflower belonging to the Lily family (Liliaceae) – a family which also includes Clintonia, Indian Cucumber-root, and Rose Twisted Stalk.  The Trout Lily is one of two plants in the Erythronium genus that occur in New York State. The plant is native to Eastern part of the US and Canada, from southern Ontario to Minnesota, south to South Carolina, Georgia, and Tennessee, west to Mississippi and Arkansas. This species is also listed as Threatened in Iowa. Within its range it is a very common and widespread species, especially in eastern North America. Some of the popular common names of the plant are Trout Lily, Dogtooth violet, yellow adder’s tongue, Yellow Trout-lily, American Trout-lily, Eastern Trout-lily, Yellow Dogtooth Violet, Adder’s Tongue, Serpent’s Tongue, Yellow fawn-lily, Yellow Snowdrop, Amberbell, fish hooks, lamb’s tongue, serpent’s tongue, snake leaf, snake root, spring lily, yellow lily, Fawn Lily and yellow bells.

 

The common name “trout lily” refers to the appearance of its gray-green leaves mottled with brown or gray, which supposedly look like the coloring of brook trout. Though Trout Lilies are not violets, they are also known as the Dogtooth Violet, Dog-tooth Violet, or Yellow Dog-tooth Violet, referring to the tooth-like shape of the white underground bulb. Similarly it is also called dog-toothed lily, because its pointed, elongated bulb resembles a dog’s canine tooth. Genus name Erythronium comes from the Greek word erythronion from erythros meaning red, originally the name for another unrelated European plant. Specific epithet means of North or South America.

Trout Lily Facts

Name Trout lily
Scientific Name Erythronium americanum
Native Eastern part of the US and Canada, from southern Ontario to Minnesota, south to South Carolina, Georgia, and Tennessee, west to Mississippi and Arkansas. This species is listed as Threatened in Iowa
Common Names Trout Lily, Dogtooth violet, yellow adder’s tongue, Yellow Trout-lily, American Trout-lily, Eastern Trout-lily, Yellow Dogtooth Violet, Adder’s Tongue, Serpent’s Tongue, Yellow fawn-lily, Yellow Snowdrop, Amberbell, fish hooks, lamb’s tongue, serpent’s tongue, snake leaf, snake root, spring lily, yellow lily,Fawn Lily, yellow bells
Name in Other Languages Danish: Gul hundetand, Amberbell, Dogtooth violet, Trout-lily, Yellow adder’s-tongue, Yellow trout lily, American trout lily, Yellow dog’s-tooth violet
English: Dogtooth violet, Eastern trout-lily, Yellow dogtooth violet, yellow adder’s tongue
French: Érythrone d’Amérique, Ail douce, Ail doux
German: Ostamerikanischer Hundszahn
Russian: Kandık amerikanskiy  (Кандык американский)
Swedish: Bronsfärgad hundtandslilja
Upper Sorbian: Ameriski hrymzyčnik
Plant Growth Habit Colony forming, spring short-lived small yellow wildflower
Growing Climates Meadows, rich damp open woodland, along streams, slopes of ravines, Cliffs, balds, or ledges, forests, wooded bluffs, rocky woodlands, and banks of streams, deciduous woodlands
Soil Prefers slightly acid soil conditions but succeeds in chalky soils if these contain plenty of humus. Succeeds in almost any light soil, preferring one that is rich in humus
Plant Size Up to about 6 to 8 inches tall
Root Root system consists of a corm, with fibrous roots and stolons that create offshoots from the mother plant, resulting in colonies of plants
Leaf Elliptic or lance-shaped and mottled with brown, reddish-brown, or purplish-brown. The leaves are 2½ to 6 inches long and ½ to 2 inches across
Flowering season March to April
Flower Yellow flowers are solitary and nodding, appearing at the end of the single stem. The flowers are about an inch wide
Fruit Shape & Size Seed capsules about ½ to ¾ inch length rounded, 3-celled capsule
Fruit Color Green, changing to brown
Seed Crescent-shaped seeds
Propagation By  Root Division , Seeds
Flavor/Aroma
Taste Bitter, acrid
Plant Parts Used Leaves, root
Available Forms Tincture or poultice
Season May to June
Precautions
  • Skin contact with the bulbs has been known to cause dermatitis in sensitive people.

Trout lily Scientific Classification

Scientific Name: Erythronium americanum

Rank Scientific Name & (Common Name)
Kingdom Plantae (Plants)
Subkingdom Tracheobionta (Vascular plants)
Infrakingdom Streptophyta  (land plants)
Super Division Spermatophyta (Seed plants)
Division Magnoliophyta (Flowering plants)
Sub Division Spermatophytina  (spermatophytes, seed plants, phanérogames)
Class Liliopsida (Monocotyledons)
Sub Class Liliidae
Super Order Lilianae  (monocots, monocotyledons, monocotylédones)
Order Liliales
Family Liliaceae (Lily family)
Genus Erythronium L. (fawnlily)
Species Erythronium americanum Ker Gawl. (dogtooth violet)
Sub Species
  • Erythronium americanum ssp. americanum Ker Gawl. – dogtooth violet
  • Erythronium americanum ssp. harperi (W. Wolf) C.R. Parks & Hardin – dogtooth violet
Synonyms
  • Erythronium americanum subsp. americanum
  • Erythronium americanum f. americanum
  • Erythronium americanum f. bachii (Farw.) Dole
  • Erythronium americanum var. bachii Farw
  • Erythronium americanum f. castaneum L.B.Sm
  • Erythronium americanum f. nuttallianum (Schult. & Schult.f.) Voss
  • Erythronium americanum f. oswaldii Moldenke
  • Erythronium americanum var. rubrum Farw
  • Erythronium angustatum Raf
  • Erythronium aquatile Salisb
  • Erythronium aureum Loisel
  • Erythronium bracteatum Bigelow
  • Erythronium flavescens Loisel
  • Erythronium flavum Sm
  • Erythronium lanceolatum Pursh
  • Erythronium nuttallianum Schult. & Schult.f

Plant Description

Trout lily is a colony forming, spring, short-lived small yellow wildflower plant that normally grows up to about 6 to 8 inches tall. The plant is found growing in meadows, rich damp open woodland, along streams, slopes of ravines, Cliffs, balds, or ledges, forests, wooded bluffs, rocky woodlands, and banks of streams and deciduous woodlands. The plant prefers slightly acid soil conditions but succeeds in chalky soils if these consist of plenty of humus. Similarly it succeeds in almost any light soil. Root system consists of a deeply buried, bulb-like corm, light brown, about 1 inch long, and solid with white starchy flesh with fibrous roots and stolons that create offshoots from the mother plant, resulting in colonies of plants. Trout lily has no stem except for when it flowers then one flower appears per stem. This perennial herbaceous spring plant grows from a deep, ovoid bulb that can send up several single-leaved sterile offshoots along with the fertile plant. The bulb has a brown outer layer and an off white center. They are about 0.5 inches in diameter and lie roughly 2-5 inches below the surface. Nectar is produced at the base of the tepals, typical of plants in the family Liliaceae.

Leaves

Basal leaves are 2½-6 inches long and ½-2 inches across. They are ascending to erect, elliptic-lanceolate in shape, and smooth (entire) along their margins. Upper leaf surface is mottled pale green and brown or greenish brown, while the lower surface is solid medium green. Both surfaces are glabrous and the lower surface is often glaucous. The petioles of these leaves are relatively long, but they are located mostly or entirely underneath the ground surface. Immature shoots (Sterile) are single-leaved and they produce no flowers, while mature shoots have two leaves and they produce single-flower. Immature shoots are more common than mature shoots.

Flower

After seven years of growing, one slender, cylindrical scape grows between the leaves to produce a single flower. The scape is 4-8 inches long and curves at the end with the flower facing downward. The nodding flower is ¾-1¼ inches long, consisting of 6 yellow tepals, 6 stamens, and an ovary with 3 erect stigmata. They are sometimes tinged with purple or reddish brown on the outside of the petals. Initially, the tepals are barely separated from each other, but as the flower matures they become strongly recurved, exposing the reproductive organs. These tepals are narrowly elliptic-lanceolate in shape, and they are often tinted red or reddish brown along their outer sides. The stamens are about ½ inches long and their anthers are yellow or yellow-brown. The blooming period occurs during mid-spring and lasts about 2 weeks. The flowers are hermaphrodite (have both male and female organs).

Fruit

Later, the fertile flowers are replaced by obovoid seed capsules that are about ½ to ¾ inch in length or a little longer. These capsules are glabrous and their tops are truncate to round. The capsule starts out as green, changing to brown and splitting open into three sections to expose the crescent-shaped seeds. Ripening of the fruit starts from May to June.

Traditional uses and benefits of Trout lily

  • All parts of the plant, but especially the bulb and the fresh leaves, are strongly emetic and are not used internally.
  • Fresh leaves are also antiscrofulatic and emollient and are used as an infusion or stimulating poultice applied to swellings, tumors and scrofulous ulcers.
  • The juice from crushed leaves has been applied to wounds that are not healing.
  • Poultice of the crushed bulbs has been applied to swellings and to help remove splinters.
  • Raw plant, excluding the roots, has been used by native North American young girls to prevent conception.
  • The Cherokee used the juice from warmed leaves for wounds and an infusion of the root for fever.
  • The Iroquois used a poultice of smashed roots for swellings.
  • Trout lily leaves and bulbs were once eaten for medicinal purposes as a contraceptive.
  • Leaves and bulb are crushed and used to dress wounds and reduce swellings, for scrofula and other skin problems.
  • Herbal tea made from the root and leaf is said to reduce fever and fainting, tea also taken for ulcers, tumors and swollen glands.
  • Trout Lily has 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, lymphatic, wound healing and nervine properties.
  • It is used for urinary tract conditions such as cystitis and nephritis; inflammations of the mucus membranes of the body, edema, chronic skin conditions, and stress-related conditions such as anxiety, insomnia and muscle tension.
  • Externally it is used for wounds, abscesses and myco-bacteria infections of the skin.
  • Root has been used to alleviate swellings and fever.

Culinary Uses

  • Bulb can be consumed raw or cooked.
  • Leaves can be consumed raw or cooked.
  • It can also be added to salads.
  • Eating the leaves will greatly reduce the vigor of the bulb, so can only be suggested in times of crisis.
  • Flowers, flower buds and flower stems can be consumed raw or cooked.
  • Very young leaves or corms can be used as cooked vegetables.
  • The corms are edible as well and have a cucumber-like taste.
  • You can add this plant to a salad or eat them as a trail snack.
  • You can also make a tea with the flower, leaves or corm (or all).
  • Collect enough corms then they can be roasted.

Other Facts

  • Plants spread freely by means of underground stems and make a delightful ground cover in dappled shade.
  • Some trout lily colonies are 200 to 300 years old.
  • It is said that the Cherokee Indians would chew Trout Lily root and spit it in the water to make fish bite.
  • Its bulbs are sterile up to around their 7-8th year and produce only one leaf and no flowers.
  • When they mature they put out two leaves and one, beautiful yellow nodding flower.
  • The corms (roots) can be boiled and served with butter.
  • Its yellow flowers turn toward the sun on sunny days and nod toward the ground at nighttime and on overcast days.

 


References


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Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
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Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
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Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

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  • Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Drink safe fluids and monitor temperature.
  • In dengue-prone areas, discuss CBC and platelet count when fever persists or warning signs appear.
  • Use tepid sponging for high fever discomfort; avoid ice-cold bathing.

OTC medicine safety

  • For fever, common fever medicine may be discussed with a clinician or pharmacist.
  • Avoid aspirin/ibuprofen-like medicines in suspected dengue unless a doctor says it is safe.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Fever with breathing difficulty, confusion, repeated vomiting, bleeding, severe weakness, stiff neck, or dehydration needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

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Doctor to discuss: Medicine doctor / pediatrician for children / qualified clinician
Tests to discuss with doctor
  • Temperature chart and hydration assessment
  • CBC with platelet count if fever persists or dengue/other infection is possible
  • Urine test, malaria/dengue tests, chest evaluation, or blood culture only when clinically indicated
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
  • Do I need antibiotics, or is this more likely viral?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Erythronium americanum, Yellow adder’s tongue, Yellow trout lily

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

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Frequently Asked Questions

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