Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Apiales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (3/4/24):
Hydrocotyle tribotrys
FAMILY
Araliaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Whorled Marsh-pennywort at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Hydrocotyle prolifera
FAMILY
Apiaceae
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Hydrocotyle tribotrys
SYNONYMOUS WITH Aquatic & Wetland Plants of Southeastern US (Godfrey & Wooten, 1979 & 1981)
Hydrocotyle verticillata var. triradiata
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 140-01-003b:
Hydrocotyle verticillata var. triradiata FAMILY Apiaceae
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Hydrocotyle australis
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Hydrocotyle canbyi
COMMON NAME:
Whorled Marsh-pennywort, Water-pennywort
To see larger pictures, click or hover over the thumbnails.
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_hyca13_001_lvd
)
JK Marlow jkm140601_062
May Greenville County SC
Furman University
)
JK Marlow jkm140601_063b
May Greenville County SC
Furman University
Inflorescence verticillate, unbranched. Flowers & fruits on 1-10mm pedicels, per Weakley's Flora (2012).
)
JK Marlow jkm140601_290
May Greenville County SC
Furman University
Peduncles shorter to longer than petioles, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm140601_292
May Greenville County SC
Furman University
Leaves peltate, orbicular to suborbicular, crenate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm140601_319
May Greenville County SC
Furman University
)
JK Marlow jkm250615_1023
June Greenville County SC
Furman University
When first developing, the inflorescences sometimes appear merely umbellate, per Weakley's Flora (2025).
)
JK Marlow jkm250707_1516
July Greenville County SC
Furman University
)
JK Marlow jkm250712_1608
July Greenville County SC
Furman University
)
JK Marlow jkm250712_1609
July Greenville County SC
Furman University
)
JK Marlow jkm250712_1609b
July Greenville County SC
Furman University
)
Richard and Teresa Ware rtw_h_prolifera_2
July
)
JK Marlow jkm140803_296
August Greenville County SC
Furman University
Fruit strongly flattened laterally, glabrous, 1-2mm long; pedicels 1-10mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm140803_298
August Greenville County SC
Furman University
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (3/4/24):
Hydrocotyle tribotrys
FAMILY
Araliaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Hydrocotyle prolifera
FAMILY
Apiaceae
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Hydrocotyle tribotrys
SYNONYMOUS WITH
Aquatic & Wetland Plants of Southeastern US (Godfrey & Wooten, 1979 & 1981)
Hydrocotyle verticillata var. triradiata
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 140-01-003b:
Hydrocotyle verticillata var. triradiata
FAMILY
Apiaceae
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Hydrocotyle australis
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Hydrocotyle canbyi
3680
Forb
Perennial
Habitat: swamp forests, pools, per Weakley's Flora
Native to the Carolinas & Georgia
Uncommon in Coastal Plain (rare elsewhere in GA-NC-SC)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple - peltate
Petioles 5-15cm long
FLOWER:
Spring/Summer
White/ Greenish
Radially symmetrical
5-merous
5 petals
Inferior ovary
Inflorescence an interrupted spike or raceme with 3-7 whorls of 2-7 flowers each
FRUIT:
Spring/Summer?
Schizocarp of two mericarps
TO LEARN MORE about this plant, look it up in a good book!
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p121
- Field Guide to the Wildflowers of Georgia (Chafin, 2016) p042
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".