Salvia purpurea is a tall evergreen which flowers autumn winter with jacaranda coloured flowers, though the exact shade can vary if seed grown. It is a brittle plant so needs protection from a lot of wind.
It is similar to iodantha in growth and flower but a different flower colour. The foliage also tends to have a grey tinge. In the mountains near Puerto Vallarta in Mexico iodantha is a very common plant and I asked an expert if it could be confused with purpurea with a colour variation and he said no because it grows at a different altitude! Thankfully in cultivation we mostly don’t have to worry about what altitude salvias are suited for as they are mostly so adaptable.
This is the first year I have had a good stock of purpurea. Cuttings grown in summer tend to rot with too much moisture and heat.