Perideridia erythrorhiza

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Perideridia erythrorhiza
Perideridia erythrorhiza Lois Shoemaker lg.jpg
Status TNC G1.svg
Critically Imperiled  (NatureServe) [1]
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Apiales
Family: Apiaceae
Genus: Perideridia
Species:
P. erythrorhiza
Binomial name
Perideridia erythrorhiza
(Piper) T.I.Chuang & Constance

Perideridia erythrorhiza is a rare species of flowering plant in the family Apiaceae known by the common names western yampah and redroot yampah. It is endemic to Oregon in the United States, where there are about 20 occurrences. The populations occur in three regions in southwestern Oregon, which are separated by more than 50 miles (80 km). [1] The three separate groups are in the Klamath Mountains and on either side of the Cascade Range. [2]

This plant is a perennial herb growing up to 1.2 meters (3 ft 11 in) in height. The roots are pink to reddish brown in color. The inflorescence is an umbel of tiny white flowers. [1] Blooming occurs in July through September. [2]

This species grows on valley floors in heavy clay soils. The habitat is prairie, pasture, and the edges of woodlands. Other plants in the habitat may include tufted hairgrass (Deschampsia cespitosa) and California oatgrass (Danthonia californica). [1]

Threats to this rare species include housing development, agriculture and grazing, herbicides, introduced species, and nickel mining. [2]

It has been proposed that one of the three groups of populations may represent a separate species. [3]

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<i>Perideridia bolanderi</i> Species of flowering plant

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<i>Perideridia kelloggii</i> Species of flowering plant

Perideridia kelloggii is a species of flowering plant in the family Apiaceae known by the common name Kellogg's yampah. It is endemic to California, where it is known from the north and central coasts, the San Francisco Bay Area, and the Sierra Nevada foothills. It grows in grassland habitat, sometimes on serpentine soils. It is a perennial herb which may reach 1.5 meters in maximum height, its slender, erect stem growing from a cluster of long, narrow, fibrous roots each up to 15 centimeters long. Leaves near the base of the plant have blades up to 45 centimeters wide which are divided into many leaflets subdivided into narrow, elongated lobes. The inflorescence is a compound umbel of many spherical clusters of small white flowers. These yield ribbed, oblong-shaped fruits each about half a centimeter long.

Perideridia lemmonii is a species of flowering plant in the family Apiaceae known by the common names Lemmon's yampah and tuni. It is native to the western United States, where it is known from southeastern Oregon, western Nevada, and the mountains of eastern California. It grows in meadows, forests, and other habitat. It is a perennial herb approaching one meter in maximum height, its slender, erect stem growing from usually a single small tuber about 1.5 centimeters long. Leaves near the base of the plant have blades up to 30 centimeters long divided into one or two pairs of leaflets, each of which may be subdivided. The inflorescence is a compound umbel of many spherical clusters of small white flowers. These yield ribbed, round or oblong-shaped fruits each under half a centimeter long.

<i>Perideridia oregana</i> Species of flowering plant

Perideridia oregana is a species of flowering plant in the family Apiaceae known by the common names Oregon yampah and eppaw. It is native to Oregon and California in the western United States, where it grows in woodland and other habitat. This plant is quite variable in appearance. In general, it is a perennial herb 10 to 90 centimeters tall, its green to waxy-grayish erect stem growing from a cluster of small tubers. Leaves near the base of the plant have blades 3 to 30 centimeters long divided into a variable number of leaflets, which may be subdivided into smaller segments. The inflorescence is a compound umbel of many spherical clusters of small white flowers. These yield ribbed, oblong-shaped fruits 3 to 6 millimeters long.

<i>Perideridia parishii</i> Species of flowering plant

Perideridia parishii is a species of flowering plant in the family Apiaceae known by the common name Parish's yampah. It is native to mountainous regions of the southwestern United States, where it grows in forests and other habitat. It is a perennial herb growing up to 90 centimeters tall, its slender green stem growing from a small tuber. Leaves near the base of the plant have blades 10 to 20 centimeters long divided into pairs of leaflets, which may be subdivided or lobed. The inflorescence is a compound umbel of many spherical clusters of small white flowers. These yield ribbed, round or oblong-shaped fruits each about half a centimeter long.

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<i>Eucephalus vialis</i> Species of flowering plant

Eucephalus vialis is a rare North American species of flowering plant in the aster family known by the common name wayside aster. It is native to southwestern Oregon and northwestern California in the United States.

<i>Calochortus coxii</i> Species of flowering plant

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References

  1. 1 2 3 4 Perideridia erythrorhiza. The Nature Conservancy.
  2. 1 2 3 Perideridia erythrorhiza. Archived 2011-10-26 at the Wayback Machine Center for Plant Conservation.
  3. Meinke, R. J. (2006). Experimental outplanting of Perideridia erythrorhiza ("Klamathense") on the Fremont-Winema National Forest. Prepared for the Fremont-Winema National Forest under Agreement Number 2003-CS-11060220-020.