Dig deeper at SERNEC, a consortium of southeastern herbaria.
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
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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.
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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.
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Terry Holdsclaw tdh_s_asteriscus_tri_1
July Iredell County NC
Ray florets 11-16 per head, per Flora of North America.