CPC Plant Profile: Blumer's Dock
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Plant Profile

Blumer's Dock (Rumex orthoneurus)

Description
  • Global Rank: G3 - Vulnerable
  • Legal Status: N/A
  • Family: Polygonaceae
  • State: AZ, NM
  • Nature Serve ID: 161236
  • Date Inducted in National Collection: 05/28/1986

This species is a long-lived herbaceous perennial plant. If can grow to a height of 2 meters (6.6 ft) and produces oblong, semi-succulent basal leaves that are large (up to 45 cm (18 in) long and 18 cm (7 in) wide). Flowers appear from late July to mid-August on plants that are over one or two feet tall, and are typical of species in the buckwheat family because they lack petals. The inflorescence itself is a large, narrow panicle that sits on the upper half of a tall stalk. Seeds are produced in late august. (Arizona Fish and Game Department 1999) This species was proposed for federal protection in 1998, but genetic studies and surveys resolved some taxonomic questions, showing that this species had a much larger distribution than previously thought. Those taxonomic questions involved a closely related species, Rumex occidentalis, which looks similar to R. orthoneurus, but is much more widespread. Rumex occidentalis has a tap root while Rumex orthoneurus has rhizomes. (USFWS 1999)

Participating Institutions
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Updates
  • 10/08/2020
  • Seed Collection

A transplant/introduction program was begun in the Tonto and Coronado National Forests using plants grown at Desert Botanical Gardens from seed collected in the Sierra Ancha Mountains. (Arizona Fish and Game Department 1999)

  • 10/08/2020
  • Reintroduction

A transplant/introduction program was begun in the Tonto and Coronado National Forests using plants grown at Desert Botanical Gardens from seed collected in the Sierra Ancha Mountains. (Arizona Fish and Game Department 1999)

  • 10/08/2020
  • Genetic Research

Recent genetic work indicates that Rumex orthoneurus is distinct from Rumex occidentalis, but R. orthoneurus has a much larger distribution than was previously thought. This is the reason why Rumex orthoneurus was initially proposed for federal protection in 1998, then dropped in 1999. (USFWS 1999; Mount & Floyd 1992)

Nature Serve Biotics
  • 05/02/2017

Known from mid- to high-elevation wetland habitats in Arizona and southwestern New Mexico. Its habitat is limited and is heavily used for recreation (hiking and camping), and grazing. Some populations are also threatened by mining and road construction.

Joyce Maschinski, Ph.D.
  • 01/01/2010

Threats include habitat loss and degradation due to: Livestock grazing Recreation Water diversions and development Road construction and maintenance Wildfire (USFWS 1998)

Joyce Maschinski, Ph.D.
  • 01/01/2010

Several populations are known in Arizona, limited primarily to the sites in the Pinaleno, Chiricahua, Huachuca, and Sierra Ancha mountains and from Santa Fe, Lincoln, Gila, and Carson National Forests in New Mexico, 2 locations in Sonora, Mexico.

Joyce Maschinski, Ph.D.
  • 01/01/2010

Recent genetic work indicates that Rumex orthoneurus is distinct from Rumex occidentalis, but R. orthoneurus has a much larger distribution than was previously thought. This is the reason why Rumex orthoneurus was initially proposed for federal protection in 1998, then dropped in 1999. (USFWS 1999; Mount & Floyd 1992)

Joyce Maschinski, Ph.D.
  • 01/01/2010

Populations are monitored under a conservation strategy on the Coronado and Tonto National Forests in Arizona. (Brooks 1999) A transplant/introduction program was begun in the Tonto and Coronado National Forests using plants grown at Desert Botanical Gardens from seed collected in the Sierra Ancha Mountains. (Arizona Fish and Game Department 1999)

Joyce Maschinski, Ph.D.
  • 01/01/2010

Assess population trends with monitoring and threat assessments.

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Photos
Nomenclature
Taxon Rumex orthoneurus
Authority Rech. f.
Family Polygonaceae
CPC Number 3787
ITIS 20968
USDA RUOR3
Common Names Blumer's dock | Chiricahua dock | Chiricahua Mountain dock
Associated Scientific Names Rumex orthoneurus | Rumex densiflorus subsp. orthoneurus
Distribution Known from mountains of Arizona, New Mexico and Sonora, Mexico
State Rank
State State Rank
Arizona S3
New Mexico S2?
Habitat

moist, loamy soils within riparian and wetland habitat (perennial streams and springs and cienagas)HABITAT: Mid- to high-elevation wetlands with moist, organic soil adjacent to perennial springs orstreams in canyons or meadow situations.ELEVATION: 4,480 - 9,660 ft. (1,366 - 2,946 m).Conifer forests) or Interior Southwestern Riparian Deciduous Forest. Associated species include Heleniumhoopesii, sedges and rushes (Carex and Juncus species). Often sympatric with R. occidentalis.

Ecological Relationships

This species, with its semi-succulent leaves, is very palatable to livestock and wildlife. This makes livestock grazing the most common management conflict involving this species (Brooks 1999).

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

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