Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Myrtales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Oenothera riparia
FAMILY
Onagraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Riverbank Evening Primrose at Vascular Plants of North Carolina.
(?) INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Oenothera fruticosa ssp. fruticosa
FAMILY
Onagraceae
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 10 (2021)
Oenothera riparia
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Oenothera riparia
INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)
Oenothera fruticosa ssp. fruticosa
INCLUDED WITHIN Manual of Vascular Plants of NE US & Adjacent Canada (Gleason & Cronquist,1991)
Oenothera fruticosa
INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 137-02-009?:
Oenothera fruticosa FAMILY Onagraceae
SYNONYMOUS WITH Onagraceae (Munz, 1965)
Oenothera tetragona ssp. glauca var. riparia
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Kneiffia riparia
COMMON NAME:
Riverbank Evening Primrose, Riverbank Sundrops
To see larger pictures, click or hover over the thumbnails.
)
Patrick D. McMillan pdmoriparia_wac
June
Has spongy lower stems & adventitious roots where regularly submerged, per Weakley's Flora.
)
Patrick D. McMillan pdmo_riparia
Month Unknown
Leaves linear-lanceolate and rather thick, per Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001).
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Oenothera riparia
FAMILY
Onagraceae
(?) INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Oenothera fruticosa ssp. fruticosa
FAMILY
Onagraceae
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 10
Oenothera riparia
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Oenothera riparia
INCLUDED WITHIN
Floristic Synthesis of North America (Kartesz, 1999)
Oenothera fruticosa ssp. fruticosa
INCLUDED WITHIN
Manual of Vascular Plants of NE US & Adjacent Canada (Gleason & Cronquist,1991)
Oenothera fruticosa
INCLUDED WITHIN
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 137-02-009?:
Oenothera fruticosa
FAMILY
Onagraceae
SYNONYMOUS WITH
Onagraceae (Munz, 1965)
Oenothera tetragona ssp. glauca var. riparia
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Kneiffia riparia
2689
Forb
Perennial
Habitat: Freshwater tidal marshes and freshwater tidal swamp forests, non-tidal swamps, along channel margins, per Weakley's Flora
Native to the Carolinas
Uncommon in NC, rare in SC
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Alternate
FLOWER:
Summer
Yellow
4-lobed calyx
4 petals
8 exserted stamens
Inferior ovary
FRUIT:
Summer?
Capsule
TO LEARN MORE about this plant, look it up in a good book!
- Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001) p292
- Guide to the Wildflowers of SC, 2nd ed. (McMillan, Porcher, Rayner, & White; 2022) p445
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".