Churchill Narrows buckwheat

Churchill Narrows buckwheat
(Eriogonum diatomaceum)

Class:	Dicotyledoneae
Order:	Polygonales
Family:	Polygonaceae
Genus:	Eriogonum
Species:	diatomaceum

Habitat:	dry, relatively barren and undisturbed, clay to silty deposits

Official Status:

Candidate

Life History:

Low, loosely branched perennial mat 0.5-2.5 dm across from a stout woody taproot; leaves sheathing 1.5-4 cm up the stem, stalked, blades elliptic, mostly 0.8-2 x 0.5-1.2 cm, densely grayish-tomentose; flowering stems scapiform, mostly 0.5-1.5 dm long, white-tomentose, each with a single head of creamy-white flowers with greenish-tan to reddish markings.

Distribution and Habitat:

All known occurrences are in the Churchill Narrows area of Lyon County, Nevada.

Dry, relatively barren and undisturbed, white to yellowish tan, often gysiferous, clay to silty diatomaceous deposits of the Coal Valley Formation, with a variable volcanic cobble overburden, on rounded knolls, low ridges, slopes, and especially small drainages on all aspects at elevations of 1300-1410 m

Threats:

The loss of habitat by recent agricultural and municipal development activities, off-road vehicles and soil disturbance by grazing livestock

Actions / Current Information:

Date	Citation	Title
11/09/2009	74 FR 57803 57878	Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions
12/10/2008	73 FR 75175 75244	Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
12/06/2007	72 FR 69033 69106	Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
09/12/2006	71 FR 53755 53835	Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions
05/11/2005	70 FR 24869 24934	Endangered and Threatened Wildlife and Plants; Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule