Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Silphium asteriscus var. latifolium
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. latifolium
FAMILY
Asteraceae
INCLUDED WITHIN Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Silphium asteriscus var. latifolium
SYNONYMOUS WITH Tennessee Flora Committee (2015)
Silphium glabrum
SYNONYMOUS WITH Floristic synthesis of North America. BONAP (Kartesz, 2010)
Silphium asteriscus var. latifolium
INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21 (2006)
Silphium asteriscus var. latifolium
INCLUDED WITHIN Guide to the Vascular Plants of the Blue Ridge (Wofford, 1989)
Silphium trifoliatum
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-007:
Silphium laevigatum FAMILY Asteraceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium glabrum
COMMON NAME:
Whorled Rosinweed
To see larger pictures, click or hover over the thumbnails.
)
Richard and Teresa Ware rtw_s_asteriscus_latifo_4
June
Ray flowers 12-20 per head, per Weakley's Flora (2012).
)
Richard and Teresa Ware rtw_s_trifoliatum_latif_1
July
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Silphium asteriscus var. latifolium
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Silphium trifoliatum var. latifolium
FAMILY
Asteraceae
INCLUDED WITHIN
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Silphium asteriscus var. latifolium
SYNONYMOUS WITH
Tennessee Flora Committee (2015)
Silphium glabrum
SYNONYMOUS WITH
Floristic synthesis of North America. BONAP (Kartesz, 2010)
Silphium asteriscus var. latifolium
INCLUDED WITHIN
Flora of North America north of Mexico, vol. 19-20-21
Silphium asteriscus var. latifolium
INCLUDED WITHIN
Guide to the Vascular Plants of the Blue Ridge (Wofford, 1989)
Silphium trifoliatum
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-007:
Silphium laevigatum
FAMILY
Asteraceae
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium glabrum
3790
Forb
Perennial
Habitat: woodlands, roadsides, per Weakley's Flora
Native to the Carolinas & Georgia
Uncommon in GA Piedmont (rare elsewhere in GA-NC-SC)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Mostly opposite
FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Flower heads with 12-17 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!
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".