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''Eriogonum crosbyae'' is a species of wild buckwheat known by the common name Crosby's buckwheat. It is native to southcentral
Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...
and northwestern
Nevada Nevada ( ; ) is a U.S. state, state in the Western United States, Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. N ...
in the United States.''Eriogonum crosbyae''.
The Nature Conservancy.
Some treatments include plants in
Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...
and
Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...
as members of this species.''Eriogonum crosbyae''.
Flora of North America.
This plant was first discovered in the Guano Valley in
Lake County, Oregon Lake County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 8,160. Its county seat is Lakeview. The county is named after the many lakes found within its boundaries, including Lake Abert, Summe ...
, in 1978 by
Bureau of Land Management The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's la ...
botanist Virginia Crosby, and it was named for her in 1981.''Eriogonum crosbyae''.
Oregon Department of Agriculture.
This
perennial A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...
herb In general use, herbs are a widely distributed and widespread group of plants, excluding vegetables and other plants consumed for macronutrients, with savory or aromatic properties that are used for flavoring and garnishing food, for medicinal ...
forms mats of stems from a branching
caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...
. It is hairless to hairy to woolly in texture and sometimes glandular, and it is greenish or grayish in color. The woolly leaves are up to 3 centimeters long. The
inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
is a headlike cluster of yellow or cream flowers. This plant only grows in
tuff Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock cont ...
, a soil composed of
volcanic ash Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, created during volcano, volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter. The term volcanic ash is also often loosely used t ...
, or tuffaceous
sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ...
. The substrate is light tan to white in color. There are few other plants around but species in the habitat may include '' Astragalus'' spp., '' Atriplex confertifolia'', '' Chrysothamnus nauseosus'', ''
Tetradymia glabrata ''Tetradymia glabrata'' is a species of flowering plant in the aster family known by the common name littleleaf horsebrush. It is native to the western United States, especially the Great Basin and Mojave Desert. Its habitat includes sagebrush, ...
'', ''
Artemisia Artemisia may refer to: People * Artemisia I of Caria (fl. 480 BC), queen of Halicarnassus under the First Persian Empire, naval commander during the second Persian invasion of Greece * Artemisia II of Caria (died 350 BC), queen of Caria under th ...
'' spp., ''
Elymus cinereus Elymus may refer to: * ''Elymus'' (plant), a genus of grasses * Elymus (mythology), the mythical ancestor of the Elymians * A man killed by Gorge (mythology) In Greek mythology, Gorge( grc, Γόργη, comes from the adjective ''gorgos,'' "terri ...
'', '' Stanleya viridiflora'', '' Sphaeralcea'' sp., '' Ipomopsis congesta'', '' Astragalus tiehmii'',''Eriogonum crosbyae''.
Center for Plant Conservation.
and '' Cryptantha schoolcraftii''.''Eriogonum crosbyae''.
Bureau of Land Management.
Mining Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic via ...
is a significant threat to this species. Most Nevada occurrences are on land leased by mining operations. This plant's specific habitat type is targeted for mining. Mining has already destroyed some occurrences.''Eriogonum crosbyae''.
Nevada Natural Heritage Program.
"Range improvement projects" are another type of threat. Off-road vehicles are in use in the area. The plant also appears to have low
recruitment Recruitment is the overall process of identifying, sourcing, screening, shortlisting, and interviewing candidates for jobs (either permanent or temporary) within an organization. Recruitment also is the processes involved in choosing individual ...
.


References


External links


USDA Plants Profile for ''Eriogonum crosbyae''
{{Taxonbar, from=Q5389363 crosbyae Flora of Nevada Flora of Oregon Flora of the Great Basin Endemic flora of the United States Plants described in 1981