Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (2/8/20):
Silphium asteriscus var. trifoliatum
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.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Silphium trifoliatum var. trifoliatum
FAMILY
Asteraceae
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-006:
Silphium trifoliatum FAMILY Asteraceae
COMMON NAME:
Whorled Rosinweed
To see larger pictures, click or hover over the thumbnails.
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 (Radford, Ahles, & Bell, 1968).
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.
Terry Holdsclaw tdh_s_asteriscus_tri_1
July Iredell County NC
Ray florets 11-16 per head, per Flora of North America.
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (2/8/20):
Silphium asteriscus var. trifoliatum
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Silphium trifoliatum var. trifoliatum
FAMILY
Asteraceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-006:
Silphium trifoliatum
FAMILY
Asteraceae