What do peacocks, CDs and certain plants have in common? They all have multi-coloured parts – feathers, surfaces or petals – which change their hue depending on the angle you look at them. This physical phenomenon in which an ordered repeating surface structure rather than a pigment gives an object its colour is called iridescence. [...]
Nothoscordum gracile is an apomitic tetraploid with a rare karyotype with 2n = 19 and is widely distributed throughout the Americas. It has been suggested to form a species complex with sexual and apomictic N. nudicaule and N. macrostemon. Souza et al. provide cytogenetic and molecular evidence that diploids of N. nudicaule and N. macrostemon are [...]
