Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Silphium at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (2/8/20):
Silphium asteriscus var. dentatum
FAMILY
Asteraceae
INCLUDING
PLANTS NATIONAL DATABASE:
Silphium asteriscus +
FAMILY
Asteraceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-54-004a:
Silphium dentatum var. dentatum
FAMILY
Asteraceae
COMMON NAME:
Starry Rosinweed
Click or hover over the thumbnails to see larger pictures.
JK Marlow jkm200525_5289b
May Greenville County SC
Bracts ciliate, per Vascular Flora of the Carolinas.
JK Marlow jkm120728_987
July Abbeville County SC
Parson's Mountain Recreation Area
Stems glabrous or less often scabrous or spreading pubescent, leafy to summit, per Vascular Flora of the Carolinas.
JK Marlow jkm140711_837
July Greenville County SC
Swamp Rabbit Trail
Ray florets 8-13 per head, per Flora of North America.
JK Marlow jkm140711_842
July Greenville County SC
Swamp Rabbit Trail
Involucral bracts of the genus Silphium are wide and usually squarrose, per Vascular Flora of the Carolinas.
COMPARE
involucral bracts of Silphium
JK Marlow jkm140711_844
July Greenville County SC
Swamp Rabbit Trail
Leaves coarsely serrate to dentate, harshly scabrous, often hirsute, per Vascular Flora of the Carolinas.
JK Marlow jkm140718_942
July Spartanburg County SC
Basal leaves caducous; cauline leaves opposite or alternate, per Flora of North America.
JK Marlow jkm140718_944
July Spartanburg County SC
Lvs petiolate or sessile/lanceolate, falcate or ovate/bases attenuate to round, per Flora of North America.
JK Marlow jkm140718_964
July Spartanburg County SC
Disk flowers staminate. Style yellow, undivided, well exserted, per www.missouriplants.com.
JK Marlow jkm140718_976
July Spartanburg County SC
Basal leaves caducous; cauline leaves opposite or alternate, per Flora of North America.
JK Marlow jkm140719_998
July Spartanburg County SC
The bracts on the receptacle of the heads of Asteraceae are called chaff.
JK Marlow jkm140719_998b
July Spartanburg County SC
Chaff apices stipitate-glandular [bearing stalked glands], per Vascular Flora of the Carolinas.
JK Marlow jkm140720_019b
July Spartanburg County SC
Pales [receptacular bracts in the Asteraceae] stipitate-glandular, per Weakley's Flora.
JK Marlow jkm140724_058b
July Greenville County SC
Swamp Rabbit Trail
Paleae puberulent and stipitate-glandular, per Flora of North America.