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Silphium radula
roughstem rosinweed Aster Family
Silphium radula Asteraceae
common names
  roughstem rosinweed
  starry rosinweed
accepted scientific name
  Silphium radula Nutt.
rules for finding collection records
  Silphium gracile (97)
  Silphium radula (137)
  Silphium reverchonii (11)
family name
Image Author: ©2012 Sonnia Hill
Image License: Author's permission
Image Source Image Source Image Source
Category: Wildflowers
Flowers: Many petals
Petal colors: color
Flower size is about 2.5 inches
Number of ray petals: 12 to 30
Leaf: Alternate, Opposite, Basal
Plant Observed beginning of April thru end of September

How Likely at this Location (15%)
Name Match (100%)
Plant Showiness (72%)
Links to Plant Photos
UT Austin BIO 406D (10)
Cal Photos (9)
Wikimedia Commons (1)
base map where plant found
mag select

grid lines base