pale touch-me-not

(Impatiens pallida)

               
Conservation Status

IUCN Red List

not yet assessed

pale touch-me-not

NatureServe

N5 - Secure

SNR - Unranked

Minnesota

not listed

Wetland
Indicator
Status

Great Plains

FACW - Facultative wetland

Midwest

FACW - Facultative wetland

Northcentral & Northeast

FACW - Facultative wetland

Nativity

Native

Occurrence

 

Habitat

Moist. Woods, forests, meadows, stream banks. Light shade to partial sun.

Flowering

July to September

     
Flower Color

Yellow

     
Height

2 to 6

     

Identification

This is a 2 to 6 tall, erect, annual forb that rises from a shallow, branching taproot. It often forms colonies

The stems are erect, hairless, branched above the middle, light green, and translucent. They are succulent, hollow, and easily broken. They are often covered with a whitish, waxy coating (glaucous).

The leaves are alternate, egg-shaped or elliptic, and thin. They are 1 to 4 long and up to 2 wide, less than 3 times longer than wide. They are on leaf stalks up to 2 long, the stalk usually shorter than the blade. The upper surface is blue-green or glaucous and hairless. The lower surface is hairless. The margins have rounded, forward-pointing teeth. The teeth are tipped with a short, sharp, whitish, abrupt point. The leaves on flowering branches are usually more than 3 long.

The inflorescence is a widely-spreading cluster of 1 to 3 flowers rising from the upper leaf axils. The flowers are held horizontally on ¾ to 1 long, drooping stalks.

The flowers are 1 to 1½ long. There are 3 petal-like sepals and 5 petals. The upper 2 sepals are yellow, small, and located behind the upper lip. The lower sepal is yellow. It is modified to form a bowl-shaped tube ending in a narrow nectar spur. The bowl-shaped portion of the sepal is about as long as it is wide. The spur is to ¼ long, hairless, and is held at a right angle to the flower body, pointing downward.

The petals are yellow and often dotted with reddish-brown. One petal forms the upper lip. It is short and wide and curves upward. The four remaining petals are fused in pairs to form two lobed, lateral petals. The lobes of these petals spread outwards forming a pair of landing pads for pollinating insects. Near the upper lip are 5 stamens fused together forming a cap over the pistil. There is no floral scent.

The fruit is a slender, hairless, 5-valved capsule about ¾ long. When ripe it explodes if touched or jarred, releasing its seeds.

 
Similar
Species

Spotted touch-me-not (Impatiens capensis) is usually a smaller plant. The leaves on flowering branches are no more than 3 long. The flowers are smaller, ¾ to 1 long, and are orange. The tube formed by the lower sepal is longer and cone-shaped, longer than wide. The spur is longer, ¼ to long, and is curved forward and held close to the body of the flower. The petals are orange. It is more common than pale touch-me-not and is found in sunnier, more open locations.


Distribution Distribution Map   Sources: 2, 3, 4, 5, 7, 28.

Comments

 


Taxonomy

Family:

Balsaminaceae (touch-me-not)

 
Synonyms

 

 
Common
Names

jewel-weed

jewelweed

pale snapweed

pale touch-me-not

pale-snapdragon

yellow jewelweed

yellow touch-me-not


 

 

 

 

 

 

 

 

 

 

Glossary

axil

The upper angle where the leaf stalk meets the stem.

 

glaucous

Pale green or bluish gray due to a whitish, powdery or waxy film, as on a plum or a grape.

 

sepal

An outer floral leaf, usually green but sometimes colored, at the base of a flower.

 

succulent

Having thick leaves, stems, or roots that store water. Succulent tissues appear fleshy externally and juicy internally.

       

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MinnesotaSeasons.com Photos

   

Plant

  pale touch-me-not   pale touch-me-not
       

Inflorescence

  pale touch-me-not   pale touch-me-not
       

Flower

  pale touch-me-not   pale touch-me-not
       
       

 

Camera

     

Slideshows

   
  Pale Touch-me-not (Impatiens pallida)
Bill Keim
 
  Pale Touch-me-not (Impatiens pallida)  
     
  Impatiens pallida (Pale Touch-me-not)
Allen Chartier
 
  Impatiens pallida (Pale Touch-me-not)  

 

slideshow

     

Visitor Videos

   
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Other Videos

 
  Jewelweed / touch-me-not
Marc Perroquet
 
   
 
About

Published on Sep 22, 2013

I decided to redo this little video.

Impatiens pallida / Pale or Yellow jewelweed / touch-me-nots

 
     
  Bumblebee visits pale jewelweed
Robert Klips
 
   
 
About

Uploaded on Mar 15, 2011

Jewelweed, Impatiens pallida (Balsaminaceae) is an annual plant well known as a poison-ivy remedy and also for its delightful fruits that split apart when pinched, flinging their seeds a great distance. This specimen was videoed August 2010 in Licking County, Ohio, USA.

 
     

 

Camcorder

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