Centaurium sp.

Centaury at Tharwa, ACT

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Identification history

Centaurium sp. 26 Dec 2024 RWPurdie
Centaurium erythraea 25 Dec 2024 Clarel

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3 comments

RWPurdie wrote:
   26 Dec 2024
It's either Centaurium erythraea or C. tenuiflorum, but hard to work out which from the photos.
Clarel wrote:
   28 Dec 2024
Thanks very much RWPurdie. I plan another walk and will try for better photos. There was a lot of it.
RWPurdie wrote:
   28 Dec 2024
One of the things to look for is whether each plant has a rosette of leaves at its base. The basal rosette is absent or weakly developed in C. tenuiflorum and present and distinct in C. erythraea. The other distinguishing characters are: in C. tenuiflorum, the corolla lobes are 3–5 mm long; the calyx is mostly 6–8 mm long and usually at least two-thirds the length of corolla tube. In C. erythraea, the corolla lobes are 5–6 mm long; the calyx is mostly 4–6 mm long and less than two-thirds the length of corolla tube. So, if possible, take photos of the base of the plants and close-up photos of the flowers side-on.

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Location information

Sighting information

Additional information

  • 10cm to 30cm Plant height
  • True In flower

Species information

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  • Nearby sighting(s) of same species
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