OF THE CAROLINAS & GEORGIA

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

WEAKLEY'S FLORA (4/24/22):
Silphium compositum var. compositum   FAMILY Asteraceae   NEW! Click to go to FSUS key


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

INCLUDED WITHIN Flora of North America
Silphium compositum

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-002a:
Silphium compositum var. compositum   FAMILY Asteraceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium orae

 

COMMON NAME:
Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed


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

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm191222_2361_s_composit

    Clay County    AL

Cheaha State Park

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm200422_4030

April    Greenville County    SC

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm200422_4031

April    Greenville County    SC

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm060528_004

May    Greenville County    SC

Leaves deeply lobed or dissected, glabous on both surfaces, per Vascular Flora of the Carolinas.

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm060528_005

May    Greenville County    SC

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm200530_5401

May    Greenville County    SC

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm210516_0339

May    Greenville County    SC

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    s000528_a

May    Greenville County    SC

Petioles and midribs may be green or red, per All About South Carolina Wildflowers.

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

Richard and Teresa Ware    rtw_s_compositum_7_s

June        

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm220702_8839

July    Oconee County    SC

Is this some kind of a gall?

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm220702_8849

July    Oconee County    SC

More galls?

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

Carrie Hannah Penn    chp_s_compositum_flower

August    DeKalb County    GA

Stone Mountain Park

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm0408k_01

August    Oconee County    SC

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm120812_408

August    Greenville County    SC

Ashmore Heritage Preserve

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm120812_419

August    Greenville County    SC

Ashmore Heritage Preserve

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm120812_436

August    Greenville County    SC

Ashmore Heritage Preserve

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm120812_444

August    Greenville County    SC

Ashmore Heritage Preserve

Silphium disc flowers have undivided styles (vs. Helianthus forked), per www.missouriplants.com

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm120812_472

August    Greenville County    SC

Ashmore Heritage Preserve

Stem 1-4m tall, leafy only toward the base or stem leaves very much reduced, per Vascular Flora of the Carolinas.

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm130824_660

August    Greenville County    SC

Ashmore Heritage Preserve

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

Richard and Teresa Ware    rtw_silphium_compositum

August        

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm080914_003

September    Greenville County    SC

Ashmore Heritage Preserve

Heads with 6-12 ray flowers; involucres mostly 1.0-1.5cm wide, per Weakley's Flora.

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm080914_004

September    Greenville County    SC

Ashmore Heritage Preserve

Bracts wide, usually squarrose, acute or obtuse, glabrous, ciliate or erose, per Vascular Flora of the Carolinas.


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

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm080914_005

September    Greenville County    SC

Ashmore Heritage Preserve

image of Silphium compositum var. compositum, Carolina Rosinweed, Compassplant, Rhubarb-leaved Rosinweed

JK Marlow    jkm0310b_30

October    Greenville County    SC

Ashmore Heritage Preserve

 

WEAKLEY'S FLORA (4/24/22):
Silphium compositum var. compositum   FAMILY Asteraceae

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

INCLUDED WITHIN Flora of North America
Silphium compositum

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-002a:
Silphium compositum var. compositum   FAMILY Asteraceae

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium orae

 

Find by SCIENTIFIC NAME:

1385

Forb
Perennial

Native to the Carolinas & Georgia

Common

Habitat: Longleaf pine sandhills, other xeric forests and woodlands, roadbanks, per Weakley's Flora

map
NEW! Click here to see a map from Weakley's Flora of the Southeastern US showing range and abundance.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)

LEAVES:
Simple
Alternate

FLOWER:
Spring/Summer/Fall
Rays: Yellow
Disc: Yellow
Disc flowers functionally staminate/ Ray flowers pistillate & fertile
Flower heads with 6-12 ray flowers, notched at apex
Inferior ovary

FRUIT:
Spring/Summer/Fall
Achene

 

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



 


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