| Common name | red-cap gum, illyarie |
| Scientific name | Eucalyptus erythrocorys F. Muell. |
| Family | Myrtaceae |
| Etymology | Genus: From the Greek eu, well; calyptos, covered; in reference to the flower bud which has an operculum or cap. Species: From the Greek erythro, red |
| Distribution | Occurs in a very restricted area of south-western Western Australia on the coastal strip north of Perth from Geraldton to Shark Bay, however it is quite common within this range. |
| Native habitat | Scrubby bushland on undulating sites, in shallow calcareous sand over coastal limestone. |
| Description | A small tree or stout mallee. |
| Flowering/fruiting | Summer to autumn, but also sporadically throughout the year. |
| Location in Garden | To see this species at Mount Annan, just follow Cunningham Drive to the Eudesmia Arboretum on your right. |
| | The contrasting bright yellow flowers and red bud cap, along with its small size, make this tree an outstanding specimen for the garden or a large container. It needs an alkaline soil, plenty of sunshine and good drainage. |
