OF THE CAROLINAS & GEORGIA

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

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Silphium reniforme   FAMILY Asteraceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium compositum var. reniforme   FAMILY Asteraceae

INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21 (2006)

Silphium compositum

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-002b:

Silphium compositum var. reniforme   FAMILY Asteraceae

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)

Silphium reniforme

 

COMMON NAME:
Ragged Rosinweed, Kidneyleaf Rosinweed


         To see larger pictures, click or hover over the thumbnails.

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_sire9_001_lvd

        

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm130718_448

July    McDowell County    NC

The hickory leaves provide an idea of scale.

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm230717_4450

July    Greenville County    SC

Blue Wall Preserve

Heads relatively small (disk 8-15mm wide), with 6-12 ray flowers, per Weakley's Flora (2023).

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm230717_4452

July    Greenville County    SC

Blue Wall Preserve

Bracts wide, acute or obtuse, glabrous, ciliate or erose, usually squarrose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).


click here to see other plants that look similar to this COMPARE involucral bracts of Silphium

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm230717_4454

July    Greenville County    SC

Blue Wall Preserve

Leaves unlobed, coarsely dentate, often to 40cm wide, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm230717_4455

July    Greenville County    SC

Blue Wall Preserve

Leaves usually as wide as long or wider, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

Will Stuart    wil_5984487318_1bf6dc0684

July    Burke County    NC

Table Rock

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

Will Stuart    wil_5984487650_b0764288c

July    Burke County    NC

Table Rock

The smooth purple stems of the plant are nearly naked.. — Will Stuart

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm151024_573

October    Greenville County    SC

Blue Wall Preserve

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm151024_578

October    Greenville County    SC

Blue Wall Preserve

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm151030_640b

October    Greenville County    SC

Blue Wall Preserve

Leaves usually pubescent, at least beneath, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Silphium reniforme, Ragged Rosinweed, Kidneyleaf Rosinweed

JK Marlow    jkm151030_641

October    Greenville County    SC

Blue Wall Preserve

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Silphium reniforme   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium compositum var. reniforme   FAMILY Asteraceae

INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21
Silphium compositum

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-002b:
Silphium compositum var. reniforme   FAMILY Asteraceae

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium reniforme

 

Find by SCIENTIFIC NAME:

2113

Forb
Perennial

Habitat: Dry forests, woodlands, roadsides, per Weakley's Flora

Native to the Carolinas & Georgia

Uncommon (rare in GA)

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

LEAVES:
Simple
Alternate

FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Flower heads with 6-12 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!



 


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