Noticastrum DC. is a South American genus revised by Zardini (1985). The genus includes some 21 species that have white, yellow, or purplish ray florets (anthocyanotic). Semple (2006) included some species of Noticastrum in a survey of pappus variation in the Chrysopsidinae; the pappus can be reddish due to the presence of anthocyanin in small dots of color on the bristles.
Zardini, E.M. 1985. Revision del genero Noticastrum (Compositae-Asterae). Revista del Museo de La Plata, n.s. 13. 83: 313-424.
Semple, J.C.. 2006. Quadruple, triple, double, and simple pappi in the goldenasters, subtribe Chrysopsidinae (Asteraceae: Astereae). Sida 22(1): 503–531.
Last revised 7 May 2025 by J.C. Semple
© 2025 J.C. Semple, including all photographs unless otherwise indicated
1-6. Noticastrum. 1. Habit, N. gnaphalioides, Steinbach 7025 MO. 2. Habit, N. adscendens, Joseph 3456 LL-TEX. 3. Habit, N. marginatum acaulis, Tupagachi 722 MO. 4. Heads, N. adscendens, J 3456. 5. Head, N. macrocephalum, Cabrera 2054 MO. 6. Heads, N. hatschbachii, Hatschbach 41024 TEX.