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
Ray florets 8-20 per head, per Flora of North America.
)
JK Marlow jkm070528_002
May Laurens County SC
Sumter National Forest: Tyger Ranger District
Leaf surfaces scabrous to hispid, basal leaves caducous at flowering, per Weakley's Flora.
)
JK Marlow jkm070528_008
May Laurens County SC
Sumter National Forest: Tyger Ranger District
Involucral bracts in the genus Silphium are wide and usually squarrose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm080608_012
June Greenville County SC
Lake Conestee Nature Park
)
JK Marlow jkm080611_001
June Greenville County SC
Lake Conestee Nature Park
)
JK Marlow jkm080611_003
June Greenville County SC
Lake Conestee Nature Park
)
JK Marlow jkm080611_005
June Greenville County SC
Lake Conestee Nature Park
Rows of large recurved bracts beneath the disc form a cup-like shape, per All About South Carolina Wildflowers (Midgley, 1999).
COMPARE
involucral bracts of Silphium
)
JK Marlow jkm080611_008
June Greenville County SC
Lake Conestee Nature Park
)
JK Marlow jkm080611_008b
June Greenville County SC
Lake Conestee Nature Park
Involucral bracts ciliate, glabrous or pubescent on the backs, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm0408k_15
August Oconee County SC
)
Richard and Teresa Ware rtw_s_asteriscus_asteri_6
August
)
Richard and Teresa Ware rtw_s_asteriscus_asteri_8
August
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.
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
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
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".
Or try alternate spellings: If "wooly" doesn't work, try "woolly" or just "wool".