desert false indigo

(Amorpha fruticosa)

               
Conservation Status

IUCN Red List

not yet assessed

desert false indigo

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

Common

Habitat

Lake shores, riverbanks, stream banks, meadows, shallow marshes.

Flowering

Late May to early July

     
Flower Color

Deep violet-purple

     
Height

3 to 10

     

Identification

This is a 3 to 10 tall, erect, bushy, perennial shrub that rises on 1 to several stems. It reproduces by suckers and sometimes forms dense thickets. It is often found leaning over water.

The stems are erect or leaning, often branched, woody, and up to 2 in diameter at the base. The bark is gray and rough and has numerous short, horizontal lenticels.

First-year twigs are grayish-brown and are covered with short, fine, white, appressed hairs. Second-year twigs are usually hairless.

The leaves are alternate, deciduous, and 12 to 40 long. They are pinnately divided into usually 9 to 21, occasionally up to 35 or more, leaflets. They are on to 1 long leaf stalks. The leaf stalks are usually covered with short, white, appressed hairs, sometimes hairless.

The leaflets are oblong to elliptical, 1 to 1¾ long, and to ¾ wide. They are tapered at the base and rounded or blunt at the tip. The leaf tip is occasionally slightly notched and has a short, sharp, abrupt point. The upper surface is dark green, not shiny, and is hairless or sparsely covered with minute hairs. The lower surface is pale green and is usually sparsely covered with fine, short, hairs. The underside is also sometimes dotted with black, sunken glands. The margins are untoothed.

The inflorescence is a cluster of 1 to 4, usually 3, erect, spike-like racemes at the end of the stem and branches. The racemes are densely flowered, 2 to 6 long, and to ¾ wide.

The individual flowers are on 1 32 to 1 16 long stalks. There are 5 green sepals fused for most of their length into a bell-shaped, long tube (calyx), then separated into 5 shallow, unequal, triangular lobes. The upper 4 lobes are short, the lowest lobe longer and narrower. The corolla is a single 3 16 to ¼ long, deep violet-purple petal. The petal is tubular near the base, unfolded near the tip to form a protective covering over the stamens and pistil. There are 10 stamens with purple filaments united near the base and yellow to orange anthers protruding well beyond the corolla.

The fruit is a bright green, hairless, conspicuously glandular, oblong, ¼ to long pod with 1 or 2 seeds. The pod matures mid August to late September. It turns brown when it dries.

 
Similar
Species

 


Distribution Distribution Map   Sources: 2, 3, 4, 5, 7, 8, 28.

Comments

 


Taxonomy

Family:

Fabaceae (pea)

 

Subfamily:

Faboideae (Papilionoideae)

 

Tribe:

Amorpheae

 
Synonyms

Amorpha angustifolia

Amorpha bushii

Amorpha croceolanata

Amorpha curtissii

Amorpha dewinkeleri

Amorpha fruticosa var. angustifolia

Amorpha fruticosa var. croceolanata

Amorpha fruticosa var. emarginata

 

Amorpha fruticosa var. oblongifolia

Amorpha fruticosa var. occidentalis

Amorpha fruticosa var. tennesseensis

Amorpha occidentalis

Amorpha occidentalis var. arizonica

Amorpha occidentalis var. emarginata

Amorpha tennesseensis

Amorpha virgata

 
Common
Names

desert false indigo

desert indigobush

dullleaf indigo

false indigo

false indigo-bush

indigobush

leadplant


 

 

 

 

 

 

 

 

 

 

Glossary

calyx

The group of outer floral leaves (sepals) below the petals, occasionally forming a tube.

 

corolla

A collective name for all of the petals of a flower.

 

lenticel

A corky, round or stripe-like, usually raised, pore-like opening in bark that allows for gas exchange.

 

pinnate

Having the leaflets of a compound leaf arranged on opposite sides of a common stalk.

 

raceme

An unbranched, elongated inflorescence with stalked flowers. The flowers mature from the bottom up.

 

sepal

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

 

sucker

A basal shoot rising from the roots or from a bud at the base of a shrub or tree.

       

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  desert false indigo   desert false indigo
       

Inflorescence

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  desert false indigo   desert false indigo
       

Infructescence

  desert false indigo   desert false indigo
       
       

 

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Other Videos

 
  Apis mellifera amorpha fruticosa
2as4nature
 
   
 
About

Published on Feb 20, 2014

Ape su amorfa, Remanzacco (UD)

 
     
  Čivitnjača (Amorpha fruticosa).avi
jubpz
 
   
 
About

Published on Jan 9, 2013

Invazivna biljka čivitnjača ili amorfa brzo se širi poplavnim nizinskim terenima ubrzavajući proces sukcesije. Također predstavlja i velik problem kod podizanja mladih šuma hrasta lužnjaka jer raste brže od mladih hrastova. Hrastići ostaju bez svjetlosti u gustom sklopu ove biljke te se suše. Vrlo ju je teško iskorijeniti.

 
     
  Honeybees on False Indigo-bush セイヨウミツバチ♀と赤い花粉団子
sigma1920HD
 
   
 
About

Published on Aug 10, 2012

Workers of honeybee (Apis mellifera, family Apidae) foraging for nectar and pollen on the flowers of desert false indigo (aka false indigo-bush or bastard indigobush; Amorpha fruitcosa, family Fabaceae) at the riverbank. The pollen basket (or corbiluca) on the hindleg is loaded with red pollen. Mid-June 2012 in Japan.

日本語による詳細はブログをご覧ください。

http://sigma-nature-vlog.blogspot.jp/2012/08/blog-post_11.html

イタチハギに訪花するセイヨウミツバチ♀と赤い花粉団子

 
     

 

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