bur cucumber

(Sicyos angulatus)

               
Conservation Status

IUCN Red List

not yet assessed

bur cucumber

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. Streambanks, thickets, wood edges, roadsides.

Flowering

June to August

     
Flower Color

Pale green with darker veins

     
Height

Climbimg, 18 to 25 long

     

Identification

This is an annual, herbaceous vine produces multiple lanky, prostrate or climbing stems from a shallow, branched taproot. It has separate male and female flowers, both appearing on the same plant.

The stems are light green and hairy. They can extend 18 to 25.

The tendrils are branched.

The leaves are alternate and are attached to the vine on 1 to 3 long leaf stalks. They are up to 8 long and 8 wide. They have 3 to 5 shallow lobes with pointed tips, and are deeply-cleft at the base where they attach to the leaf stalk. The margins have tiny, widely-spaced teeth. The leaf surfaces are rough to the touch. The upper surface si mostly hairless, the lower surface is covered with fine, short hairs.

The male and female flowers are borne separately from the same leaf axils. The male inflorescence is a 12 to 16 long, erect cluster of many flowers. The female inflorescence is a small, head-like cluster on a shorter stalk.

The flowers are to ½ wide and star-shaped. They have 5 petals that are pale green with darker green veins. There is no fragrance.

The fruits are in clusters of 3 to 5. Each fruit is a to ½ long, egg-shaped capsule covered with spiny prickles and long white hairs. It contains 1 seed.

 
Similar
Species

Wild cucumber (Echinocystis lobata) has hairless stems. The leaves are more deeply-lobed. The flowers have 6 petals. The fruit is a much larger, green, inflated, egg-shaped capsule containing 4 seeds.

Canada moonseed (Menispermum canadense) leaf stalks attach to the blades a little less than ½ inside the margin.


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

Comments

 


Taxonomy

Family:

Cucurbitaceae (cucumber)

 

Tribe:

Sicyoeae

 
Synonyms

 

 
Common
Names

bur cucumber

burcucumber

bur-cucumber

oneseed bur cucumber

wall burr cucumber


 

 

 

 

 

 

 

 

 

 

Glossary

Axil

The upper angle where the leaf stalk meets the stem.

 

Glandular hairs

Hairs spread over aerial vegetation that secrete essential oils. The oils act to protect against herbivores and pathogens or, when on a flower part, attract pollinators. The hairs have a sticky or oily feel.

       

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Habitat

  bur cucumber    
       

Inflorescence

  bur cucumber    
       

Leaves

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Infructescence

  bur cucumber   bur cucumber
       
  bur cucumber    
       
       

 

Camera

     

Slideshows

   
  One-seeded Bur Cucumber (Sicyos angulatus)
Bill Keim
 
  One-seeded Bur Cucumber (Sicyos angulatus)  

 

slideshow

     

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Other Videos

 
  MyNature Apps; Identifying Bur Cucumber, Sicyos angulatus
MyNatureApps
 
   
 
About

Published on Apr 29, 2012

How to identify Bur Cucumber, Sicyos angulatus also known as star cucumber. www.mynatureapps.com

 
     
  Weed of the Week #812 - Bur Cucumber (Air Date 10/27/13)
AgPhD
 
   
 
About

Published on Oct 31, 2013

It's our Weed of the Week, Bur Cucumber.

 
     

 

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