Taraxia subacaulis
| Taraxia subacaulis | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Onagraceae |
| Genus: | Taraxia |
| Species: | T. subacaulis
|
| Binomial name | |
| Taraxia subacaulis | |
| Synonyms[2] | |
|
List
| |
Taraxia subacaulis is a species of evening primrose known by the common name longleaf suncup. It is native to the western United States, where it grows in several habitat types, especially in mountainous areas in moist meadows. It is a fleshy perennial herb growing from a taproot and usually lacking a stem. The leaves are lance-shaped to oval and up to 22 centimeters long and are borne on long petioles. The flower has 4 yellow petals, each up to 1.5 centimeters long, and a large, bulbous stigma tip. The fruit is a leathery capsule 1 to 3 centimeters long.
Description
Longleaf suncup is a perennial plant without stems that grows from a thick taproot. It has a single rosette.[3] The leaves forming the rosette are more or less hairless and also somewhat fleshy in texture. They are lanceolate, shaped like the head of a spear, or narrowly elliptic, the two sides curving. The leaf edges can be smooth or irregularly lobed.[4]
Taxonomy
Taraxia subacaulis was scientifically described and named Jussiaea subacaulis by Frederick Traugott Pursh in 1813. It was moved to the genus Taraxia giving the species its accepted name by Per Axel Rydberg in 1900. It has no accepted varieties, but it has 13 synonyms according to Plants of the World Online including nine species.[2]
| Name | Year | Rank | Notes |
|---|---|---|---|
| Camissonia subacaulis (Pursh) P.H.Raven | 1964 | species | ≡ hom. |
| Jussiaea subacaulis Pursh | 1813 | species | ≡ hom. |
| Oenothera heterantha Nutt. | 1834 | species | = het. |
| Oenothera heterantha var. taraxacifolia S.Watson | 1873 | variety | = het. |
| Oenothera primuloidea H.Lév. | 1902 | species | = het. |
| Oenothera subacaulis (Pursh) Jeps. | 1925 | species | ≡ hom. |
| Oenothera subacaulis var. taraxacifolia (S.Watson) Jeps. | 1925 | variety | = het. |
| Oenothera taraxacifolia H.Lév. & Guffroy | 1902 | species | = het., nom. illeg. |
| Oenothera taraxacifolia var. caulescens H.Lév. | 1902 | variety | = het. |
| Oenothera triloba Hook. | 1847 | species | = het., nom. illeg. |
| Taraxia heterantha (Nutt.) Small | 1896 | species | = het. |
| Taraxia heterantha var. taraxacifolia (S.Watson) Small | 1896 | variety | = het. |
| Taraxia taraxacifolia (S.Watson) A.Heller | 1900 | species | = het. |
| Notes: ≡ homotypic synonym; = heterotypic synonym | |||
Names
Taraxia subacaulis is known by the common name longleaf suncup.[1]
References
Citations
- ^ a b NatureServe 2025.
- ^ a b c POWO 2025.
- ^ Cronquist, Holmgren & Holmgren 1997, p. 198.
- ^ Wagner & Hoch 2012.
Sources
- Cronquist, Arthur; Holmgren, Noel H.; Holmgren, Patricia K. (1997). Intermountain Flora : Vascular Plants of the Intermountain West, U.S.A.. Vol. Three, Part A. Subclass Rosidae (except Fabales). New York: New York Botanical Garden. ISBN 978-0-89327-374-3. OCLC 503654484. Retrieved 20 September 2025.
- Web sources
- "Taraxia subacaulis (Pursh) Rydb". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 20 September 2025.
- NatureServe (5 September 2025). "Taraxia subacaulis". NatureServe Explorer. Arlington, Virginia. Retrieved 20 September 2025.
- Wagner, Warren L.; Hoch, Peter C. (2012). "Taraxia subacaulis, in Jepson Flora Project". Jepson eFlora. University of California, Berkeley. Retrieved 20 September 2025.