rust

Alexanders Smyrnium olusatrum with Puccinia smyrnii rust on some leaves, and detail of one flower and one seed.

Puccinia striiformis Yellow Rust Wheat disease on a wheat leaf

Puccinia recondite or P tritcina Brown Rust Wheat disease

Sweetcorn Zea mays plant

Scots pine Pinus sylvestris trees in pen and ink from young dapling to mature adult tree

Scots pine Pinus sylvestris tuft with mature cone and green cones