Minnesota dwarf trout lily

(Erythronium propullans)

               
Conservation Status

IUCN Red List

not yet assessed

Minnesota dwarf trout lily

NatureServe

N1 - Critically Imperiled

S1 - Critically Imperiled

Minnesota

Endangered

Nativity

Native

Occurrence

Rare

Habitat

Moist. Floodplain woods, river terrace, northwest and northeast facing slopes.

Flowering

Mid-April to early or mid-May

Photo by twCarlson
Flower Color

White or pinkish-white

 
Height

1½ to 5

 

Identification

This erect perennial is found as colonies of 1 or 2 up to 500 plants. The plant rises from a short, vertical, thickened, underground stem (corm). Almost all of the plants in a colony will flower each year.

Most plants are two-leaved and produce flowers. Non-flowering plants have one leaf. The leaves appear to originate at the base, but they actually originate below ground, about halfway up the underground stem. They are arranged in pairs but are not exactly opposite. They are 1½ to 5 long, lance-shaped, untoothed, fleshy, green, flat, mottled or spotted with silver, and covered with a whitish, waxy coating.

The inflorescence is a solitary flower hanging downward at the end of a stout, nodding stem. The stem is 1½ to 4¾ tall, hairless and leafless.

The flower is dime-size or smaller and has 4 to 6 tepals, usually 5. The tepals are to long, lance-shaped, and white or pinkish-white. They flare outward, extending nearly to the horizontal, eventually curving backward. The anthers are yellow.

The plant reproduces vegetatively from a single creeping stem on fertile plants that roots at the nodes sending up new plants (stolons). Fruits are rarely produced. When they are it may be the result of hybridization with white trout lily. They are small and nodding, not erect.

 
Similar
Species

White trout lily (Erythronium albidum) is sympatric with Minnesota dwarf trout lily. Where the two species occur together non-blooming plants are indistinguishable. However, less than 1% of the plants in a colony will flower in any given year. Therefore, if a carpet on one-leaved non-flowering plants are seen they may be white trout lily but cannot be Minnesota dwarf trout lily. white trout lily is a larger plant. The leaves are 3 to 8½ long. The flowering stem is 4 to 6 long. The flower always has 6 tepals. The tepals are 1 to 2 long and white or bluish-white with yellow near the base.


Distribution Distribution Map  

Sources: 2, 3, 4, 5, 6, 7, 23, 28.

The map at left includes two sightings outside this species’ native range, one at the Eloise Butler Wildflower Garden in Wirth Park (Hennepin County), and the other at the University of Minnesota Landscape Arboretum in Chanhassen (Carver County). It also includes an occurrence reported by the U.S. Fish & Wildlife Service County Distribution of Federally-Listed Threatened, Endangered, Proposed, and Candidate Species (Dodge County); and an occurrence reported to The Biota of North America Program (Fillmore County).


Comments

Spring Ephemeral
This is a spring ephemeral. All of the parts of the plant that are above ground will have disappeared by the time the forest canopy has developed in June.

Where to look
Look for it mainly on lower parts of north-facing slopes that rise 40–80 feet above streams or abandoned stream channels. It can occasionally be found on northwest and northeast facing slopes.

Minnesota dwarf trout lily is endemic to Goodhue and Rice Counties in Minnesota, hence the name. It is also found in Steele County. It occurs only at elevations of 960 to 1,000 feet above sea level. The major populations are found on the slopes of the Canon and Straight Rivers near Faribault. Smaller populations occur along the Little Cannon River, Zumbro River, North Fork Zumbro River, and Prairie Creek watersheds.

Some of the public places this plant can be found are Nerstrand-Big Woods State Park; Clinton Falls Dwarf Trout Lily SNA; Cannon River Trout Lily SNA; North Fork Zumbro Woods SNA; Prairie Creek Woods SNA; Eloise Butler Wildflower Garden in Wirth Park, Minneapolis; River Bend Nature Center in Faribault; and the University of Minnesota Landscape Arboretum in Chanhassen. In Nerstrand-Big Woods State Park look for it along the boardwalk on the Hidden Falls Trail and along the north-facing slopes of Prairie Creek.


Taxonomy

Family:

Liliaceae (lily)

 

Subfamily:

Lilioideae

 

Tribe:

Tulipeae

 
Synonyms

 

 
Common
Names

adder’s tongue

dwarf trout lily

dwarfadder’s tongue

fawn lily

Minnesota adder’s tongue

Minnesota fawnlily

Minnesota trout lily


 

 

 

 

 

 

 

Glossary

Stolon

An above-ground, creeping stem that grows along the ground and produces roots and sometimes new plants at its nodes. A runner.

 

Sympatric

Referring to closely related species that have ranges that overlap but which do not interbreed.

 

Tepal

Refers to both the petals and the sepals of a flower when they are similar in appearance and difficult to tell apart. Tepals are common in lilies and tulips.

       

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twCarlson


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  Rare and endangered species blooming!
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About

Uploaded on Apr 6, 2010

It only grows in less than 600 acres and appears for fewer than three weeks each year. The Dwarf Trout Lily is an endangered species that only grows in a small area of Minnesota and no where else in the entire world.

 
     

 

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MinnesotaSeasons.com Sightings

   

Eloise Butler Wildflower Garden

Nerstrand-Big Woods State Park

Prairie Creek Woods SNA

University of Minnesota Landscape Arboretum


 

 

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