CPC Plant Profile: Ouachita Leadplant
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Plant Profile

Ouachita Leadplant (Amorpha ouachitensis)

The compound leaves and purple flower spike of the Ouachita indigobush. Photo Credit: George Yatskievych
Description
  • Global Rank: G3 - Vulnerable
  • Legal Status: N/A
  • Family: Fabaceae
  • State: AR, OK
  • Nature Serve ID: 159298
  • Date Inducted in National Collection: 02/25/1988

The Ouachita Mountain indigo is a small attractive shrub that grows to approximately 2 meters in height. The leaves are pinnately compound with broadly elliptical leaflets. The plant blooms from late April to early June. Individual flowers are tiny, but cluster together in the inflorescence, where the royal purple petals and gold anthers make a truly stunning display.

Participating Institutions
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Updates
Nature Serve Biotics
  • 05/02/2017

Over 56 known element occurrences rangewide.

Kimberlie McCue, Ph.D.
  • 01/01/2010

Alteration of streambanks Conversion of wetland areas Clear-cutting and conversion of forests to pine plantations (Oklahoma Natural Heritage Inventory 1999)

Kimberlie McCue, Ph.D.
  • 01/01/2010

Currently known from at least eleven populations in eight counties in Arkansas and three counties (McCurtain, Leflore, Pushmataha) in Oklahoma (Oklahoma Natural Heritage Inventory 1999).

Kimberlie McCue, Ph.D.
  • 01/01/2010

None known.

Kimberlie McCue, Ph.D.
  • 01/01/2010

Not Available

Kimberlie McCue, Ph.D.
  • 01/01/2010

Areas harboring populations of Ouachita indigobush should be protected from stream alteration or wetland drainage. Additional research into the life history of this plant is crucial (Oklahoma Natural Heritage Inventory 1999).

Kimberlie McCue, Ph.D.
  • 01/01/2010

Not Available

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Photos
Nomenclature
Taxon Amorpha ouachitensis
Authority Wilbur
Family Fabaceae
CPC Number 108
ITIS 25382
USDA AMOU
Common Names false indigo | Ouachita indigobush | Ouachita leadplant | Ouachita Mountain indigo | Ouachita Mountain leadplant | Ouachita false indigo
Associated Scientific Names Amorpha ouachitensis
Distribution In the Ouachita Mountain Province and the McAlester Marginal Hills Belt of southeastern Oklahoma, and the Ouachita Mountain Province in Arkansas (Zanoni et al.1979)
State Rank
State State Rank
Arkansas S3
Oklahoma S1
Habitat

In clearings in woods on rocky hillsides, immediately adjacent to streams, near rocky creeks, stream banks, and flood plains.Amorpha ouachitensis is found growing in association with Calamovilfa arcuata (also a rare plant), Streptanthus squamiformis, and Guara demareei.

Ecological Relationships

None known.

Pollinators
Common Name Name in Text Association Type Source InteractionID
Reintroduction
Lead Institution State Reintroduction Type Year of First Outplanting

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