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 perfoliatum   FAMILY Asteraceae   Go to FSUS key



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

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

Silphium perfoliatum var. perfoliatum

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-001:

Silphium perfoliatum   FAMILY Asteraceae

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

Silphium perfoliatum

 

COMMON NAME:
Common Cup-plant, Indian Cup


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

image of Silphium perfoliatum, Common Cup-plant, Indian Cup

JK Marlow    jkm0305o_19

May    Haywood County    NC

Corneille Bryan Native Garden

The stem with many leaves, these similar in size, per Weakley's Flora (2023).

image of Silphium perfoliatum, Common Cup-plant, Indian Cup

Will Stuart    wil_sperfol_20230630_0244

June    Ashe    NC

Stem square in crosssection, glabrous or glabrescent (vs. stem of S. connatum spreading-hispid), per Weakley's Flora (2023).

image of Silphium perfoliatum, Common Cup-plant, Indian Cup

Will Stuart    wil_sperfol_20230630_0323

June    Ashe    NC

image of Silphium perfoliatum, Common Cup-plant, Indian Cup

Will Stuart    wil_sperfol_20230630_0358

June    Ashe    NC

The upper leaves connate, fused basally, the stem thus perfoliate, per Weakley's Flora (2023).

image of Silphium perfoliatum, Common Cup-plant, Indian Cup

Will Stuart    wil_sperfol_20230630_0409

June    Ashe    NC

Flower heads with usually ca. 21 or ca. 34 rays (vs. S. connatum usually ca. 8 or ca. 13 rays), per Weakley's Flora (2023).

image of Silphium perfoliatum, Common Cup-plant, Indian Cup

Will Stuart    wil_sperfol_20230630_0413

June    Ashe    NC

 

 

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

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

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21
Silphium perfoliatum var. perfoliatum

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-001:
Silphium perfoliatum   FAMILY Asteraceae

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

 

Find by SCIENTIFIC NAME:

1387

Forb
Perennial

Habitat: floodplain forests and openings, sometimes escaped from cultivation, per Weakley's Flora

Native to North Carolina

Uncommon in NC

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

LEAVES:
Simple
Opposite (connate-perfoliate)

FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Flower heads with 17-35 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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