Ackerfield, J. (2022). Hiding in plain sight: Two new species of alpine thistles, Cirsium culebraensis and C. funkiae (Cardueae) from the southern Rocky Mountains (United States). The International Compositae Alliance. 1(1): 7, figs. 3-5, photogrs.
Hiding in plain sight: Two new species of alpine thistles, Cirsium culebraensis and C. funkiae (Cardueae) from the southern Rocky Mountains (United States)