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Long-stem Evening-primrose
( Oenothera longissima )
Oenothera longissima
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Long-stem Evening-primrose (Oenothera longissima)
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Oenothera longissima
is a species of flowering plant in the evening primrose family known by the common name longstem 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. The inflorescence 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.
Plant Description
Plant Type
Perennial herb
Size
2 - 6.6 ft tall
Flower Color
Yellow, Orange, Red
Wildlife Supported
Butterflies & moths hosted ( 5
likely
* )
SHOW ALL
*
White-lined Sphinx
Hyles lineata
Hyles lineata
*
Dusky Raisin Moth
Ephestiodes gilvescentella
Ephestiodes gilvescentella
*
Double-Banded Carpet
Spargania magnoliata
Spargania magnoliata
*
Orange Tortrix Moth
Argyrotaenia franciscana
Argyrotaenia franciscana
*
White-based Mompha
Mompha murtfeldtella
Mompha murtfeldtella
Landscaping Information
Natural Setting
Climate
Annual Precipitation: 6.1" - 22.6", Summer Precipitation: 0.37" - 2.72", Coldest Month: 37.0" - 51.9", Hottest Month: 66.5" - 77.6", Humidity: 2.86" - 29.04", Elevation: 1168" - 5907"
Alternative Names
Common Names
: Longstem Evening Primrose
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Long-stem Evening-primrose
Oenothera longissima
Sources include:
Wikipedia
. All text shown in the "About" section of these pages is available under the
Creative Commons Attribution-ShareAlike License
. Plant observation data provided by the participants of the
California Consortia of Herbaria
, Sunset information provided by
Jepson Flora Project
. Propogation from seed information provided by the
Santa Barbara Botanical Garden
from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include
CalPhotos
,
Wikimedia Commons
, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include
Calflora
,
CNPS Manual of Vegetation Online
,
Jepson Flora Project
,
Las Pilitas
,
Theodore Payne
,
Tree of Life
,
The Xerces Society
, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from
PRISM Climate Group, Oregon State University
, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.
Links:
Jepson eFlora Taxon Page
CalPhotos
Wikipedia
Calflora
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