My sister bought a house last month and she has 2 weird trees. One looks like an orange tree but the oranges are green inside and are bitter/sour. The peel is bright orange like a ripe orange fruit. The other tree has lemon shaped orange fruits with rind that has lots of bumps on it and it tastes like lemon. Could any one help me find out what are these trees? Her gardener told her that they were wild orange trees. TIA
