Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Malpighiales
WEAKLEY'S FLORA (2/8/20):
Triadenum walteri
FAMILY
Hypericaceae
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Its distinct petiole separates it from the similar T. virginicum and T. tubulosum. Read more at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Triadenum walteri
FAMILY
Clusiaceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 126-01-007:
Hypericum walteri
FAMILY
Hypericaceae
SYNONYMOUS WITH
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Triadenum walteri
SYNONYMOUS WITH
Gray's Manual of Botany (Fernald, 1950)
Hypericum tubulosum var. walteri
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Triadenum petiolatum
COMMON NAME:
Walter’s Marsh St. Johnswort, Greater Marsh St. Johnswort
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_trpe12_001_lvd
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JK Marlow jkm170320_160
March Greenville County SC
Cedar Falls Park
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JK Marlow jkm210813_2751
August Greenville County SC
Blackwell Heritage Preserve
Lvs mostly elliptic to ~ 2-2.5" long, tip rounded, base rounded to tapered, per Vascular Plants of North Carolina.
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JK Marlow jkm210813_2754
August Greenville County SC
Blackwell Heritage Preserve
The lower surface of the leaves of my specimens are very glaucous, per Flora of Indiana (Deam, 1940).
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JK Marlow jkm210813_2756
August Greenville County SC
Blackwell Heritage Preserve
Grows to an average of 2 feet tall and is typically is found in colonies, per Vascular Plants of North Carolina.
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JK Marlow jkm161013_936
October Greenville County SC
Cedar Falls Park
)
JK Marlow jkm161013_936b
October Greenville County SC
Cedar Falls Park
Leaves narrowed to cuneate or broadly cuneate... base. Lower leaves petiolate, per Weakley's Flora.
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JK Marlow jkm161013_936c
October Greenville County SC
Cedar Falls Park
Petals pale pink; stamens in 3 fascicles of 3 stamen each; perianth 5-merous, per Weakley's Flora (2020).
WEAKLEY'S FLORA (2/8/20):
Triadenum walteri
FAMILY
Hypericaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Triadenum walteri
FAMILY
Clusiaceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 126-01-007:
Hypericum walteri
FAMILY
Hypericaceae
SYNONYMOUS WITH
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Triadenum walteri
SYNONYMOUS WITH
Gray's Manual of Botany (Fernald, 1950)
Hypericum tubulosum var. walteri
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Triadenum petiolatum
2227
Forb
Perennial
Native to the Carolinas & Georgia
Documented growing wild in GA NC SC
Common in Coastal Plain, uncommon in Piedmont, rare in Mountains (an endemic)
Look for it in swamp forests and marshes, per Weakley's Flora
Click here to see a more detailed map from University of North Carolina at Chapel Hill Herbarium,
or click here to see a map from SERNEC, a consortium of southeastern herbaria.
LEAVES:
Simple
Opposite
Lower leaves have petioles
FLOWER:
Summer/Fall
Pinkish
Bisexual
Radially symmetrical
5-merous
5 persistent sepals
5 petals
9 stamens, persistent, in 3 clusters of 3
Superior ovary
FRUIT:
Summer/Fall
Capsule
TO LEARN MORE about this plant, look it up in a good book!
- Wildflowers of the Atlantic Southeast p367
- Wildflowers of Tennessee p067
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians p090
- Wildflowers of the Southern Mountains p099
- Wildflowers of the Sandhills Region p286