Silphium asteriscusL.

starry rosinweed

WFO wfo-0000011834 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Silphium asteriscus, photographed by Carol Ann McCormick
fig. a Carol Ann McCormick, CC BY 4.0 / 2021-06-26 / obs. 138980060
Silphium asteriscus, photographed by Carol Ann McCormick
fig. b Carol Ann McCormick, CC BY 4.0 / obs. 87816197
Silphium asteriscus, photographed by Ashwin Srinivasan
fig. c Ashwin Srinivasan, CC BY 4.0 / obs. 87929859
Silphium asteriscus, photographed by Ashwin Srinivasan
fig. d Ashwin Srinivasan, CC BY 4.0 / obs. 82530018
Silphium asteriscus, photographed by Vicki Miller
fig. e Vicki Miller, CC0 1.0 / obs. 83348414
Silphium asteriscus, photographed by laalv1
fig. f laalv1, CC BY 4.0 / obs. 81905475
Silphium asteriscus, photographed by ozarkallison
fig. g ozarkallison, CC0 1.0 / obs. 79028573
Silphium asteriscus, photographed by Emily Summerbell
fig. h Emily Summerbell, CC BY 4.0 / obs. 77557620

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 21 botanical countries

Regions where Silphium asteriscus is native: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Mississippi, Missouri, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia AlabamaArkansasFloridaGeorgiaIllinoisIndianaKentuckyLouisianaMarylandMississippiMissouriNew YorkNorth CarolinaOhioOklahomaPennsylvaniaSouth CarolinaTennesseeTexasVirginiaWest Virginia
Native distribution of Silphium asteriscus, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
Florida FLA
Georgia GEO
Illinois ILL
Indiana INI
Kentucky KTY
Louisiana LOU
Maryland MRY
Mississippi MSI
Missouri MSO
New York NWY
North Carolina NCA
Ohio OHI
Oklahoma OKL
Pennsylvania PEN
South Carolina SCA
Tennessee TEN
Texas TEX
Virginia VRG
West Virginia WVA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 301 in flower of 342 examined

Peak flowering in Aug. Each bar is the share of Silphium asteriscus observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 301 of 342 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 27 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Silphium angustum Small
  • Silphium asperrimum Hook.
  • Silphium asteriscus subsp. asteriscus
  • Silphium asteriscus var. angustatum A.Gray
  • Silphium asteriscus var. laevicaule DC.
  • Silphium asteriscus var. scabrum Nutt.
  • Silphium atropurpureum Retz. ex Willd.
  • Silphium atropurpureum f. atropurpureum
  • Silphium confertifolium Small
  • Silphium dentatum Elliott
  • Silphium dentatum f. dentatum
  • Silphium dentatum var. angustatum (A.Gray) L.M.Perry
  • Silphium dentatum var. dentatum
  • Silphium dentatum var. gatesii (C.Mohr) H.E.Ahles
  • Silphium elliottii Small
  • Silphium gatesii C.Mohr
  • Silphium gatesii f. gatesii
  • Silphium glabrum Eggert
  • Silphium glabrum Eggert
  • Silphium incisum Greene
  • Silphium integrifolium var. gattingeri L.M.Perry
  • Silphium laevigatum Pursh
  • Silphium nodum Small
  • Silphium scaberrimum Elliott

and 3 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.