twinleaf

twinleaf

 

 

 

 

 

 

 

 

 

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Jeffersonia diphylla


Taxonomy

Family:

Berberidaceae (barberry)

 

Subfamily:

Berberidoideae

 

Tribe:

Berberideae

 

Subtribe:

Epimediinae


Nativity

Native

Status

Minnesota special concern species

Habitat

Moderate moisture. Woods.

Flowering

April to May

Flower Color

White

Height

4 to 8 at flowering


Identification

This is a 4 to 8 tall, erect, perennial forb that rises from a short, horizontal rhizome. Typically 4 to 8 leaves and a single flowering stalk are produced from each rhizome.

There are no central stems.

The leaves are all basal. They are alternate, 6 to 7 wide, and compound, divided into 2 kidney-shaped segments. Each leaf is borne on a 3½ to 8 long, slender leaf stalk. The leaf segments are untoothed and sometimes have shallow lobes. The upper surface is bluish green. The lower surface is whitish green. After flowering the leaves continue to grow, eventually reaching 7 to 17 in height at maturity.

The inflorescence is a solitary flower at the end of a 4 to 8 tall, leafless flowering stalk (scape). It is usually taller than the leaves.

The flowers are to 1 wide. There are 4 petal-like sepals that drop early, usually 8 white petals, and 8 stamens.

The fruit is brownish, egg-shaped or pear-shaped, leathery, capsule-like, ¾ to 1½ long and to wide. It has a hinged, helmet-like lid and contains 10 to 25 seeds.

The seeds have fleshy appendages attached (elaiosomes) which attract ants. The ants carry the seeds back to their nests, thus dispersing the seeds.

 
Similar
Species

May-apple (Podophyllum peltatum) leaves are not compound. The flower droops from the axil of two leaves. The fruit is a yellow berry.


Range Range Map   Sources: 2, 3, 5, 6, 7.
 
Sightings

 

 

Comments

 


Images  
  twinleaf            

Synonyms

Podophyllum diphyllum

 
Common
Names

American twin leaf

American twinleaf

ground squirrel-pea

helmet-pod

jeffersonia

rheumatism root

rheumatism-root

twinleaf

yellowroot


 

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