Clicking on particular species will lead you to more information or photographs:
A camera indicates there are pictures. 
A speaker indicates there is a sound file demonstrating pronunciation
of the botanical name. 
A plus sign after a Latin name indicates that the species is further divided into varieties or subspecies. 
Your search found 35 taxa.
Common Name:
St. Johnswort, Hypericum
Manual of the Southeastern Flora (Small, 1933)
Hypericum/ Ascyrum/ Triadenum/ Sarothra spp.
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Ascyrum pumilum
)
Common Name:
St. Andrew's Cross
GREATER THAN
Manual of the Southeastern Flora (Small, 1933)
Ascyrum hypericoides
GREATER THAN
Manual of the Southeastern Flora (Small, 1933)
Ascyrum linifolium
Four yellow petals narrowly oblong-linear to oblong-elliptic, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
)
Common Name:
Creeping St. Andrew's Cross, Low St. Johnswort, Straggling St. Johnswort
SYNONYMOUS WITH
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Ascyrum hypericoides var. multicaule
Two outer sepals, ovate or widely elliptic; inner sepals usually obsolete, per Vascular Flora of the Carolinas.
)
Common Name:
St. Peter's-wort, St. Andrew's Cross, St. Peter's Cross
GREATER THAN
Manual of the Southeastern Flora (Small, 1933)
Ascyrum stans
Four unequal sepals: the 2 outer and larger enclosing 2 much narrower inner, per Wildflowers of the Carolina Lowcountry.
)
Common Name:
Common Marsh St. Johnswort
Flowers have 5 sepals, 5 pink petals, 9 stamens, and 3 stigmas on 3 styles, per Vascular Flora of the Carolinas.
SYNONYMOUS WITH
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Triadenum tubulosum
SYNONYMOUS WITH
Gray's Manual of Botany (Fernald, 1950)
Hypericum tubulosum var. tubulosum
)
Common Name:
Walter’s Marsh St. Johnswort
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
Petals pale pink. Sepals 3-5 mm long, obtuse, per Weakley's Flora.
)
Common Name:
Shrubby St. Johnswort
Five petals, the corolla 2-2.5cm broad; stamens numerous, per Native Shrubs and Woody Vines of the Southeast.
)
Common Name:
Mountain Bushy St. Johnswort, Dense-flowered St. Johnswort
Golden-yellow flowers about 1/2" wide, in a very dense flower cluster, per Newcomb's Wildflower Guide.
)
Common Name:
Interior Bushy St. Johnswort
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Hypericum interior
Flowers 7-many per inflorescence, in terminal cymes, per Weakley's Flora.
)
Common Name:
bedstraw St. Johnswort
Flowers 13-15mm in diameter in elongate inflorescences of 3-7 nodes, per Weakley's Flora.
Common Name:
Sandhill St. Johnswort
Common Name:
Lloyd's St. Johnswort, Sandhills St. Johnswort, Piedmont St. Johnswort
Common Name:
Peelbark St. Johnswort
)
Common Name:
Granite Dome St. Johnswort, Mountain St. Johnswort, Appalachian St. Johnswort, Dwarf St. Johnswort
Flowers solitary or in small, flat-topped inflorescences, per Wildflowers & Plant Communities of the Southern Appalachian Mountains and Piedmont.
)
Common Name:
Early St. Johnswort, Naked St. Johnswort, Streamside St. Johnswort
Petals yellow and 6-8mm long. Go canoeing to see this plant at its best, per Wildflowers of the Sandhills Region.
Common Name:
early St. Johnswort
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Hypericum apocynifolium
)
Common Name:
Roundpod St. Johnswort
Flowers with 5 quarter-inch petals, borne in a showy cymose inflorescence, per Atlantic Coastal Plain Wildflowers.
)
Common Name:
Pineweed, Orange-grass
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Sarothra gentianoides
Flowers yellow, terminal, 0.25" wide, with "propeller-twisted" petals. — Patrick McMillan
)
Common Name:
Hairy St. Johnswort
Small, yellow, 5-petaled flowers in a branchng inflorescence near stem top, per Atlantic Coastal Plain Wildflowers.
)
Common Name:
Canada St. Johnswort
Flowers borne in small groups, in a more-or-less flat-topped inflorescence, per Wildflowers of the Sandhills Region.
)
Common Name:
Common Dwarf St. Johnswort
Five yellow to yellow-orange petals, pistil with 3 styles, 5-15 stamens, per www.illinoiswildflowers.info.
Common Name:
Coppery St. Johnswort
)
Common Name:
Strict St. Johnswort
GREATER THAN
Vascular Flora of the Carolinas (1968)
Hypericum denticulatum var. recognitum
Sepals and petals not marked with black dots or lines, per Weakley's Flora.
)
Common Name:
European St. Johnswort
Flowers 3/4"-1" wide, with black "stitching" on the margins of petals, per Wildflowers of the Southern Mountains.
)
Common Name:
Spotted St. Johnswort
Flowers spotted or streaked with black on the undersides, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
)
Common Name:
Blue Ridge St. Johnswort
Petals have black lines and round black glands scattered over the surface, per Weakley's Flora.
)
Common Name:
Mountain St. Johnswort
Sepals &petals without black lines, round black glands only along petal margin, per Weakley's Flora.
)
Common Name:
Glade St. Johnswort
Sepals very unequal. Petals more than 0.35" long. Stamens 120-200, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
)
Common Name:
Golden St. Johnswort
GREATER THAN
Manual of the Southeastern Flora (Small, 1933)
Hypericum aureum
GREATER THAN
Manual of the Southeastern Flora (Small, 1933)
Hypericum splendens
1-3 showy flowers with broad green bracts at the ends of branches, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
)
Common Name:
Barrens St. Johnswort
GREATER THAN
Manual of the Southeastern Flora (Small, 1933)
Hypericum turgidum
GREATER THAN
Hypericum sphaerocarpum var. turgidum
Numerous flowers in an often compact, much-branched inflorescence, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
)
Common Name:
Low St. Peter's-wort
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Ascyrum tetrapetalum
Flowers w 4 petals & 4 (rarely2) sepals. Leaves cordate-clasping at the base, per Weakley's Flora.
)
Common Name:
Aaron's Beard
Single 3" yellow flowers in spring and summer, per NC State University Cooperative Extension.
Your search found 35 taxa. You are on page PAGE 1 out of 1 pages.