Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Silphium asteriscus var. asteriscus
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Silphium at Vascular Plants of North Carolina.
INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Silphium asteriscus var. asteriscus
FAMILY
Asteraceae
INCLUDED WITHIN Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Silphium asteriscus var. asteriscus
INCLUDED WITHIN Flora of North America
Silphium asteriscus var. asteriscus
INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)
Silphium asteriscus var. asteriscus
INCLUDING & INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-005:
Silphium asteriscus FAMILY Asteraceae
(?) INCLUDING Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968)
Silphium dentatum var. gatesii
INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Silphium asteriscus
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium asteriscus
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium scaberrimum
COMMON NAME:
Starry Rosinweed
To see larger pictures, click or hover over the thumbnails.
)
Wesley Burnett gwb070528_0625
May Laurens County SC
Sumter National Forest: Tyger Ranger District
)
JK Marlow jkm080611_005
June Greenville County SC
Lake Conestee Nature Park
Involucral bracts in the genus Silphium are wide and usually squarrose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
COMPARE
involucral bracts of Silphium
)
JK Marlow jkm250818_2300
August Oconee County SC
Mid and lower stem leaves opposite; stem conspicuously hispid (or at least scabrous), per Weakley's Flora (2025).
)
JK Marlow jkm250818_2302
August Oconee County SC
)
JK Marlow jkm250818_2304
August Oconee County SC
)
JK Marlow jkm250818_2305
August Oconee County SC
Basal leaves caducous; stem leaves hirsute, hispid, or scabrous, per Flora of North America.
)
JK Marlow jkm250818_2315
August Oconee County SC
Ray florets 8-20 per head, per Flora of North America.
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Silphium asteriscus var. asteriscus
FAMILY
Asteraceae
INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Silphium asteriscus var. asteriscus
FAMILY
Asteraceae
INCLUDED WITHIN
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Silphium asteriscus var. asteriscus
INCLUDED WITHIN
Flora of North America
Silphium asteriscus var. asteriscus
INCLUDED WITHIN
Floristic Synthesis of North America (Kartesz, 1999)
Silphium asteriscus var. asteriscus
INCLUDING & INCLUDED WITHIN
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-005:
Silphium asteriscus
FAMILY
Asteraceae
(?) INCLUDING
Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968)
Silphium dentatum var. gatesii
INCLUDED WITHIN
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Silphium asteriscus
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium asteriscus
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium scaberrimum
1384
Forb
Perennial
Habitat: woodlands, roadsides, per Weakley's Flora
Native
Common in NC Piedmont (rare elsewhere in Carolinas)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Opposite, or rarely alternate (basal leaves absent or withered at flowering)
FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Flower heads with 8-20 ray flowers, notched at apex
Inferior ovary
Disc flowers functionally staminate/ Ray flowers pistillate & fertile
FRUIT:
Summer/Fall
Achene
TO LEARN MORE about this plant, look it up in a good book!
- All About South Carolina Wildflowers (Midgley, 1999) p258
- Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005) p172?
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p119
- Wildflowers of Tennessee (Carman, 2005) p324
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p375?
- Wildflowers of the Southern Mountains (Smith, 1998) p199
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