| Oenothera longissima | |
|---|---|
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Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Onagraceae |
| Genus: | Oenothera |
| Species: | O. longissima |
| Binomial name | |
| Oenothera longissima | |
| Synonyms[2] | |
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Oenothera longissima is a species of flowering plant in theevening primrose family known by the common namelongstem evening primrose. It is native to the southwestern United States, where it grows in relatively moist areas in scrub and woodland habitat. This is a biennial herb producing a tall, erect stem known to well exceed 2 meters in height. The widely lance-shaped leaves may be 22 centimeters in length and may have slight teeth along the edges. Theinflorescence is a spike of showy large flowers. Each has yellow petals which may be more than 6 centimeters in length and fade orange or red with age. The fruit is a lance-shaped capsule up to 5.5 centimeters long.
Oenothera longissima was scientifically described and named by botanistPer Axel Rydberg in 1913. It is part of the genusOenothera in theOnagraceae family. The species has no acceptedsubspecies orvarieties, but it has 4synonyms.[2]
| Name | Year | Rank | Notes |
|---|---|---|---|
| Oenothera cluteiA.Nelson | 1922 | species | = het. |
| Oenothera longissima subsp.typicaMunz | 1949 | subspecies | ≡ hom.,not validly publ. |
| Oenothera longissima var.clutei(A.Nelson) Munz | 1949 | variety | = het. |
| Oenothera longissima subsp.clutei(A.Nelson) Munz | 1949 | subspecies | = het. |
| Notes: ≡homotypic synonym; =heterotypic synonym | |||
