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Hieracium scabrum (Sticky Hawkweed) Upper portion of inflorescence showing glandular hairs on branches and flower heads. Geotagged,Hieracium scabrum,Summer,United States Click/tap to enlarge

Hieracium scabrum (Sticky Hawkweed)

Upper portion of inflorescence showing glandular hairs on branches and flower heads.

    comments (9)

  1. View Christine Young's profile
    Christine Young
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    Cool! So, the glandular hairs are secretory? Posted 5 years ago
    1. View Gary B's profile
      Gary B
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      There is a resin-like substance that is produced making them sticky. It seems that there are more glandular hairs in the inflorescence than any other part of plant. Posted 5 years ago
      1. View Christine Young's profile
        Christine Young
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        I'll have to remember that so I can check it out the next time I see these! Posted 5 years ago
        1. View Gary B's profile
          Gary B
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          So what species of Hieracium (woodland or otherwise) are you seeing? Posted 5 years ago
          1. View Christine Young's profile
            Christine Young
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            As far as I know, we have a few species of hawkweed in western CT. I honestly don't know what I see because I don't know how to differentiate them. I think the one that I usually see is yellow hawkweed (H. caespitosum). We also have H. piloselloides and H. praealtum. Maybe more? Posted 5 years ago
            1. View Gary B's profile
              Gary B
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              The non-native yellow ones are a bit confusing but there are some clues to figuring them out in the field. The two native species we haver here in MN (and I suppose you have them too in CT or at least in New England) typically grow in dry open woods or openings in woods. Posted 5 years ago
              1. View Christine Young's profile
                Christine Young
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                Good to know. I usually skip photographing many plants because my ID skills are quite bad. But, I forget that there are people out there like you, who can help! Next year, I have a project in which I want to try to photograph different trees around CT during spring, summer, autumn, and winter. Posted 5 years ago
                1. View Gary B's profile
                  Gary B
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                  That's a good project especially the winter photography. Posted 5 years ago
                  1. View Christine Young's profile
                    Christine Young
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                    I thought so too. I think it would be valuable to have winter photos. And, going back to the same exact trees will be interesting. Posted 5 years ago

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The Rough Hawkweed

''Hieracium scabrum'', the rough hawkweed, is a North American plant species in the dandelion tribe within the sunflower family. It is native to eastern and central Canada and the eastern and central United States from Nova Scotia west to Ontario, Minnesota, and Kansas south as far as Georgia and Oklahoma.

Info 4 0
Similar species: Asterales
Species identified by Gary B
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By Gary B

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Uploaded Aug 20, 2020. Captured Aug 20, 2020 16:17 in 4408 Miller Rd, Barnum, MN 55707, USA.
country flag of United States of America Explore United States of America 39,925 9,640 8
  • SAMSUNG-SM-G930A
  • f/1.7
  • 1/192s
  • ISO50
  • 4.2mm
Captured in the summer. More summer photos.