The following Participating Institutions are custodians for this species in the CPC National Collection:
The Arboretum at Flagstaff
The conservation of Rumex orthoneurus is fully sponsored.
Joyce Maschinski, Ph.D. contributed to this Plant Profile.
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)
Distribution & Occurrence
- New Mexico
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 or
streams 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 Helenium
hoopesii, sedges and rushes (Carex and Juncus species). Often sympatric with R. occidentalis.
|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.|
Conservation, Ecology & Research
Water diversions and development
Road construction and maintenance
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)
Kearney, T.H.; Peebles, R.H. 1973. Arizona flora. Berkeley, CA: University of California Press. 1085p.
Martin, W.C.; Hutchins, C.R. 1980-1981. A flora of New Mexico. Germany: Hirschberg. 2591p.
Rutman, S. 1992. Handbook of Arizona's endangered, threatened, and candidate plants. Phoenix, Arizona: U.S. Fish & Wildlife Service.