Dragon Tree in Geelong Botanic Gardens
Penny commented that the tree I drew was probably a Dragon's Blood Tree. Well, it seems so and it's sometimes just called Dragon Tree and the scientific name is Dracaena draco L and from the family: Agavaceae. I found three small pics of that species growing elsewhere. I'll go back to the local Gardens and do a more detailed drawing of the Dragon Tree - but on a cool day - and after the sunburn subsides!