Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Malvales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Hibiscus trionum
FAMILY
Malvaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Flower-of-an-hour at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Hibiscus trionum
FAMILY
Malvaceae
SYNONYMOUS WITH Flora of North America
Hibiscus trionum
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 122-08-005:
Hibiscus trionum FAMILY Malvaceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Trionum trionum
COMMON NAME:
Flower-of-an-hour, Venice Mallow, Bladder Ketmia
To see larger pictures, click or hover over the thumbnails.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_hitr_001_lvd
)
Terry Holdsclaw tdh_hibiscus_trionum
July Iredell County NC
Annual from a taproot, to 0.5m tall, per Weakley's Flora.
)
Terry Holdsclaw tdh_hibiscus_trionumb
July Iredell County NC
Petals pale yellow with a purple base, the flowers only open a few hours, per Wildflowers of Tennessee (Carman, 2005).
)
Terry Holdsclaw tdh_hibiscus_trionumc
July Iredell County NC
A low plant w leaves deeply parted into 3 narrow, coarsely toothed segments, per Wildflowers of the Southern Mountains (Smith, 1998).
)
Sam Pratt sbp_081413_1907
August Spartanburg County SC
Calyx inflated at maturity; capsule 1.0-1.3 cm long, per Weakley's Flora.
)
Sam Pratt sbp_081413_1907b
August Spartanburg County SC
Calyx conspicuously veined and hairy, per Wildflowers of Tennessee (Carman, 2005).
)
Sam Pratt sbp_092513_1914
September Spartanburg County SC
In cultivation
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Hibiscus trionum
FAMILY
Malvaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Hibiscus trionum
FAMILY
Malvaceae
SYNONYMOUS WITH
Flora of North America
Hibiscus trionum
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 122-08-005:
Hibiscus trionum
FAMILY
Malvaceae
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Trionum trionum
2842
Forb
Annual
Habitat: Fields, roadsides, railroad yards, disturbed areas, per Weakley's Flora
Non-native: Europe or Africa
Uncommon in NC Piedmont, rare or waifs elsewhere in GA-NC-SC
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
LEAVES:
Simple: Palmately divided
FLOWER:
Summer/Fall
Pale yellow/ Cream
(with a red or purple center)
5 sepals united at base or more than half their length
5 petals united at base
Stamens united to form a staminal column surrounding ovary and styles
Superior ovary
FRUIT:
Summer/Fall
Capsule
TO LEARN MORE about this plant, look it up in a good book!
- Wild Flowers of NC, 2nd edition (Justice, Bell, & Lindsey, 2005) p151
- Wildflowers of Tennessee (Carman, 2005) p070
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p091
- Wildflowers of the Southern Mountains (Smith, 1998) p095
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".