Silphium confertifolium

Family:ASTERACEAE
Species:Silphium confertifolium Small
Common Name:Blackbelt Rosinweed
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:**
Plant Notes:Blackbelt Rosinweed is a native herbaceous perennial in the Sunflower family (Asteraceae). It can be found in the northern 2/3’s of Alabama. Blackbelt Rosinweed is found on chalk prairies, on cedar glades, on marl outcrops, and on roadside banks. It often occurs in areas with thin soils derived from limestone. It is a perennial with a short rhizome. The stems are 1-3 feet in height, unbranched below the inflorescence, green in color, and glabrous. Leaves are basal and cauline. The basal leaves are large and present at flowering. Basal leaves are petiolate, elliptic to lanceolate in outline, entire, and glabrous except for cilia along the margins. Stem leaves are opposite, sessile, entire, glabrous, and quickly reduced in size upwards. Flowers are produced in heads. The heads are arranged in corymbs. The heads are small for the genus. Each head has 8-13 yellow ray flowers and 35–100 yellow disc flowers. The fruit is an achene. Blackbelt Rosinweed is sometimes treated as a variety of the widespread Starry Rosinweed (Silphium asteriscus Linnaeus var. latifolium (A. Gray) J. A. Clevinger). It differs from that species by its shorter stature, smaller head size, and persistent large basal leaves.--A. Diamond
Taxonomic Notes:**
Status:Native, S3 (State Rank), G2 (Global Rank)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyASTERACEAE - Aster family
Genus Silphium
Species Silphium confertifolium Small - Blackbelt Rosinweed

Citation

Citation Silphium confertifolium Small, Fl. S.E. U.S. 1243, 1340. 1903.
Basionym: **
Type: ALABAMA: Choctaw Co.: Cocoa, 13 Oct 1896, Schuchert s.n. (holotype: NY).

** Not applicable or data not available.

Synonyms

No synonyms exist for this species.

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Autauga, Barbour, Bibb, Blount, Bullock, Coosa, Fayette, Franklin, Lauderdale, Lawrence, Lowndes, Macon, Marengo, Marshall, Montgomery, Morgan, Pike, Shelby, St. Clair, Sumter, Talladega, Tuscaloosa, Wilcox, Winston

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: AUA, JSU, TROY, UNA, UWAL

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
TROY000016239 Wilcox 07 Aug 2007 Keener, Brian R.
3825
TROY
Silphium asteriscus Linnaeus var. latifolium (Gray) J.A. Clevinger
AUA000007411 Montgomery 19 JUL 1997 SCHOTZ, ALFRED
1517
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
AUA000007409 Lowndes 9 SEP 2004 HANSEN, CURTIS J.
1630
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
AUA000007404 Autauga 15 JUN 1982 GUNN, SCOTT C.
722
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0036935 Morgan 17 Jul 2017 England, J. Kevin
8209
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
UWAL0036662 Marshall 12 Aug 2017 England, J. Kevin
8367
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
AUA000007327 Montgomery 30 AUG 1989 DIAMOND, JR., ALVIN R.
6303
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0015317 Sumter 20 Jul 2006 Keener, Brian R.
3008
UWAL
Silphium confertifolium Small
TROY000045553 Fayette 10 Jul 2012 England, J. Kevin
3630
TROY
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
AUA000007414 Tuscaloosa 9 JUL 1970 MOORE, HAROLD D.
284
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0014312 Fayette 10 Jul 2012 England, J. Kevin
3630
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J. A. Clevinger
JSU121243 Wilcox 23 Jun 1982 Gunn, Scott C.
856
JSU
Silphium confertifolium Small
AUA000007415 Wilcox 17 AUG 1982 GUNN, SCOTT C.
1066
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
AUA000007407 Franklin 10 SEP 1980 FREEMAN, JOHN D.
39
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0038632 Winston 17 Aug 2018 England, J. Kevin
9393
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
UWAL0009306 Wilcox 07 Aug 2007 Keener, Brian R.
3825
UWAL
Silphium asteriscus L. ssp. latifolium (A. Gray) J.A. Clevinger
UWAL0014805 Bullock 31 Aug 2012 Dykes, Bailee
1168
UWAL
Silphium confertifolium Small
TROY000035940 Macon 05 Oct 2012 Diamond, Alvin R.
23490
TROY
Silphium confertifolium Small
AUA000007412 Shelby 24 JUL 1997 SCHOTZ, ALFRED
1518
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0030906 Sumter 19 Sep 1975 Kral, R.
56577
UWAL
Silphium confertifolium Small
UWAL0009294 Blount 01 Aug 1998 Keener, Brian R.
1375
UWAL
Silphium asteriscus L. ssp. latifolium (A. Gray) J.A. Clevinger
UWAL0036936 Morgan 17 Jul 2017 England, J. Kevin
8209
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
UWAL0036663 Marshall 12 Aug 2017 England, J. Kevin
8358
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
AUA000007405 Bibb 20 SEP 1976 SESSLER, ANN H.
763
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
TROY000050467 Winston 17 Aug 2018 England, J. Kevin
9393
TROY
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J. A. Clevinger
AUA000007408 Lauderdale 8 JUL 1970 MOORE, HAROLD D.
249
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
AUA000007336 Talladega 28 AUG 1975 RUTLAND, DAVID W.
944
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0037415 Bullock 15 Aug 2016 Soehren, Eric C.
0383
UWAL
Silphium asteriscus L. var latifolium (A. Gray) J.A. Clevinger
AUA000007329 Pike 5 AUG 1990 DIAMOND, JR., ALVIN R.
7067
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UNA00064840 Blount 1 Aug 1998 Keener, Brian R.
1375
UNA
Silphium asteriscus L. subsp. latifolium (A. Gray) J. A. Clevinger
AUA000027886 Fayette 10 JUL 2012 ENGLAND, J. KEVIN
3630
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (A. GRAY) J.A. CLEVINGER
TROY000051865 Morgan 22 Aug 2015 England, J. Kevin
5654
TROY
Siliphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
UWAL0009305 St. Clair 09 Sep 2007 Keener, Brian R.
3846
UWAL
Silphium asteriscus L. ssp. latifolium (A. Gray) J.A. Clevinger
UWAL0011155 Marengo 11 Jul 2012 England, J. Kevin
3651
UWAL
Silphium confertifolium Small
UWAL0036751 Lawrence 07 Oct 2017 England, J. Kevin
8576
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
AUA000007410 Marshall 27 AUG 1998 SCHOTZ, ALFRED
1671
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
TROY000039884 Marengo 11 Jul 2012 England, J. Kevin
3651
TROY
Silphium confertifolium Small
UWAL0045558 Bullock 31 Jul 2016 Horne, Howard E.
3471
UWAL
Silphium asteriscus Linnaeus var. latifolium (A. Gray) J.A. Clevinger
AUA000007277 Barbour 29 JUL 1970 MOORE, HAROLD D.
423
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
AUA000007406 Fayette 12 AUG 1975 KRAL, ROBERT
56407
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
UWAL0009299 Marengo 05 Sep 2008 England, J. Kevin
1024
UWAL
Silphium asteriscus L. ssp. latifolium (A. Gray) J.A. Clevinger
AUA000007413 Shelby 24 JUL 1997 SCHOTZ, ALFRED
1518
AUA
SILPHIUM ASTERISCUS L. var. LATIFOLIUM (GRAY) J.A. CLEVINGER
TROY000036139 Bullock 31 Aug 2012 Dykes, Bailee
1168
TROY
Silphium confertifolium Small
UWAL0030126 Coosa 27 Jul 2015 England, J. Kevin
5541
UWAL
Silphium asteriscus Linnaeus var. latifolium (A.Gray) J.A. Clevinger
TROY000049481 Sumter 20 Jul 2006 Keener, Brian R.
3008
TROY
Silphium confertifolium Small
AUA000030046 Sumter 20 Jul 2006 KEENER, BRIAN R.
3008
AUA
SILPHIUM ASTERISCUS
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