Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Silphium at Vascular Plants of North Carolina.
1384
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (2/8/20):
Silphium asteriscus var. asteriscus
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Silphium asteriscus var. asteriscus
FAMILY
Asteraceae
INCLUDING
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
SYNONYMOUS WITH
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Silphium asteriscus
INCLUDING
Manual of the Southeastern Flora (Small, 1933)
Silphium asteriscus
INCLUDING
Manual of the Southeastern Flora (Small, 1933)
Silphium scaberrimum
COMMON NAME:
Starry Rosinweed
To see a detailed map, click here
Look for it in woodlands, on roadsides, per Weakley's Flora
Forb
Perennial
Native
Documented growing wild in
GA
NC
SC
Common in NC Piedmont, uncommon in NC Mountains, rare elsewhere in GA-NC-SC
LEAVES:
Simple
Opposite, rarely alternate (basal leaves absent at flowering)
FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Disc flowers functionally staminate/ Ray flowers pistillate & fertile
Flower heads with 8-20 ray flowers, notched at apex
Inferior ovary
FRUIT:
Summer/Fall
Achene
TO LEARN MORE about this plant, look it up in a good book!
Silphium asteriscus var. asteriscus FAMILY Asteraceae
Starry Rosinweed
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Silphium at Vascular Plants of North Carolina.
Click the thumbnails to see larger pictures.
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.
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.
COMPARE
involucral bracts of Silphium
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.