| Eriogonum sphaerocephalum | |
|---|---|
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Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Genus: | Eriogonum |
| Species: | E. sphaerocephalum |
| Binomial name | |
| Eriogonum sphaerocephalum | |
Eriogonum sphaerocephalum is a species of wild buckwheat known by the common names rock buckwheat and round-headed desert buckwheat. [1] It is native to the western United States.
Eriogonum sphaerocephalum can be found primarily east of the crest of the Cascade Range, in Washington and Oregon to Idaho and from southern Oregon and northern California to northern Nevada. It is a common member of desert, rocky and sagebrush steppe habitats. [2] [3] It is found over a wide range of elevations, but is most common between 2,000–7,000 feet (600–2,100 m).
The plant is a small shrub or subshrub up to 50 cm (20 in) tall and wide, growing from a caudex and producing erect flowering stems. Fresh blooms occur in early summer. [1] The leaves are wooly (typically on the underside), [1] widely lance-shaped to somewhat oval, and 1–4 cm (3⁄8–1+5⁄8 in) long, forming basal rosettes around the caudex [4] [5] and appearing at the end of branches. [1]
The inflorescence arises on a stalk and bears many yellow flowers in a head-like cluster [1] or umbel.
There are several varieties of this species:
Eriogonum is a genus of flowering plants in the family Polygonaceae. The genus is found in North America and is known as wild buckwheat. This is a highly species-rich genus, and indications are that active speciation is continuing. It includes some common wildflowers such as the California buckwheat.
Eriophyllum lanatum, with the common names common woolly sunflower and Oregon sunshine, is a common, widespread, North American plant in the sunflower family.
Eriogonum fasciculatum is a species of wild buckwheat known by the common names California buckwheat and eastern Mojave buckwheat.
Eriogonum giganteum, with the common name St. Catherine's lace, is a species of wild buckwheat in Southern California.
Eriogonum ovalifolium is a species of wild buckwheat known by the common name cushion buckwheat. It is native to western North America from California to Alberta, where it is a member of many plant communities in varied habitats, including the sagebrush steppe and alpine regions.
Eriogonum umbellatum is a species of wild buckwheat known by the common name sulphurflower buckwheat, or simply sulphur flower. It is native to western North America from California to Colorado to central Canada, where it is abundant and found in many habitats. This is an extremely variable plant and hard to identify because individuals can look very different from one another. Also, there are a great many varieties. It may be a perennial herb forming a small clump with flowers to 10 centimeters tall, or a sprawling shrub approaching two meters high and wide. The leaves are usually woolly and low on the plant, and the flowers come in many colors from white to bright yellow to purple. Native American groups utilized parts of this plant for a number of medicinal uses.
Eriogonum flavum is a species of wild buckwheat.
Chaenactis douglasii is a North American species of flowering plant in the daisy family known by the common name Douglas' dustymaiden.
Chrysothamnus viscidiflorus is a species of shrub in the daisy family of the Americas known by the common names yellow rabbitbrush and green rabbitbrush.
Eriogonum heracleoides is a plant of western North America that has many flowering clusters which are usually cream colored, or off-white. It can usually be found in rocky areas, such as sagebrush deserts and Ponderosa pine forests. Parsnipflower buckwheat is in the genus Eriogonum and the family Polygonaceae, which is a family of plants known as the "knotweed family". It inhabits much of the western part of the United States and southern British Columbia.
Eriogonum ampullaceum is a species of wild buckwheat known by the common name Mono buckwheat.
Eriogonum brachyanthum is a species of wild buckwheat known by the common name shortflower buckwheat. It is native to eastern California and western Nevada, particularly the Mojave Desert region, where it is common to abundant, and even sometimes weedy. It is also known from southern Oregon. The plant grows in sandy habitat, such as desert flats and sagebrush. It is an annual herb reaching 30 to 40 centimeters tall. The woolly leaves are oval or rounded and are located about the base of the stem. The top of the stem is occupied by a branching inflorescence bearing many widely spaced clusters of flowers. Each individual flower is about a millimeter wide and light yellow in color.
Eriogonum deserticola is a species of wild buckwheat known by the common name Colorado Desert buckwheat.
Penstemon speciosus is a species of penstemon known by the common name royal penstemon of western North America.
Ribes hudsonianum is a North American species of currant, known by the common name northern black currant.
Ribes velutinum is a species of currant known by the common name desert gooseberry.
Eriogonum callistum is a rare species of wild buckwheat, known by the common name Tehachapi buckwheat.
Eriogonum thymoides is an "abundant" species of flowering plant in the buckwheat family known by the common name thymeleaf wild buckwheat, or simply thymeleaf buckwheat.
Erigeron filifolius is a North American species of flowering plants in the daisy family known by the common names thread-leaf fleabane.
Erigeron poliospermus is a species of flowering plant in the daisy family known by the common names gray-seeded fleabane and purple cushion fleabane. Native to western North America, it is mainly found in east of the Cascade Range in Washington, Oregon, and Idaho. A species of desert, scrub and rocky habitats below 1,800 metres (6,000 ft), it occasionally found at higher elevations.
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