Native & Naturalized Plants of the Carolinas & Georgia


2910

Forb
Perennial

Native to the Carolinas
Documented growing wild in - NC SC

Uncommon

map
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full sun partial shade

LEAVES:
Simple
Whorls of 3 (rarely opposite)

FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Disc flowers functionally staminate/ Ray flowers pistillate & fertile
Flower heads with 11-16 ray flowers, notched at apex
Inferior ovary

FRUIT:
Summer/Fall
Achene

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales

WEAKLEY'S FLORA (5/21/15):
Silphium asteriscus var. trifoliatum   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium trifoliatum var. trifoliatum   FAMILY Asteraceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (1968) 179-54-006:
Silphium trifoliatum   FAMILY Asteraceae

 

COMMON NAME:
Whorled Rosinweed


Click or hover over the thumbnails to see larger pictures.

image of Silphium asteriscus var. trifoliatum

Terry Holdsclaw    tdh_s_asteriscus_tri_3

June    Iredell County    NC

Stems 1.5-3m tall, terete, leafy to the summit. Leaves harshly scabrous, per Vascular Flora of the Carolinas.

image of Silphium asteriscus var. trifoliatum

Terry Holdsclaw    tdh_s_asteriscus_tri_7446

June    Iredell County    NC

Cauline leaves predominately in whorls of 3. Leaf surfaces glabrous, per Weakley's Flora.

image of Silphium asteriscus var. trifoliatum

Terry Holdsclaw    tdh_s_asteriscus_tri_1

July    Iredell County    NC

Ray florets 11-16 per head, per Flora of North America.