Australia is blessed with many species of Mistletoe.
They are parasitic on other plants, and many Mistletoes have very specific hosts:

• Amyema bifurcatum ( Twin Forked Mistletoe ),
• Amyema biniflora ( Gum-leaf Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ),
• Amyema cambagei ( Sheoak Mistletoe ), on River Sheoak ( Casuarina cunninghamiana ),
  Belah ( Casuarina cristata ), and
  Swamp Sheoak ( Casuarina glauca )
  ( all in CASUARINACAE ),
• Amyema congener ( Erect Mistletoe ) on Sheoak Mistletoe ( Amyema cambagei, LORANTHACEAE ),
  Bottlebrush ( Callistemon, MYRTACEAE ), and
  Australian Willow ( Geijera parviflora, RUTACEAE ),
• Amyema conspicuum on Red Ash ( Alphitonia excelsa, RHAMNACEAE ),
• Amyema fitzgeraldii ( Pincushion Mistletoe ) on Raspberry Jam Wattle ( Acacia acuminata, MIMOSACEAE ),
• Amyema gaudichaudii ( Paper Bark Mistletoe ) on Paperbarks (Melalauca, MYRTACEAE ),
• Amyema gibberula ( Hakea Mistletoe ) on Hakea (Hakea, PROTEACEAE ),
• Amyema linophylla ( Buloke Mistletoe ) on Bulloak ( Allocasuarina luehmannii ),
  Belah ( Casuarina cristata ), and
  Casuarina obesa ( all in CASUARINACAE ),
• Amyema lucasii on Leopardwood ( Flindersia maculosa, RUTACEAE ),
• Amyema mackayensis ( Mackay Mistletoe ) on Grey Mangrove ( Avicennia marina, ACANTHACEAE ),
• Amyema maidenii ( Pale Leaved Mistletoe ) on Mulga ( Acacia aneura ),
  Brigalow ( Acacia harpophylla ), and
  Wichetty Bush ( Acacia kempeana ) all of MIMOSACEAE,
• Amyema melaleucae ( Melaleuca Mistletoe ) on Moonah ( Melaleuca lanceolata, MYRTACEAE ),
• Amyema miquelii ( Box Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ), and
  Wattles ( Acacia, MIMOSACEAE ),
• Amyema miraculosa ( Fleshy Mistletoe ) on Northern Sandalwood ( Santalum lanceolatum, SANTALACEAE ),
  Australian Willow ( Geijera parviflora, RUTACEAE ),
  Boobialla ( Myoporum, MYOPORACEAE ),
  Sheoaks ( Casuarinas, CASUARINACAE ), and
  other Mistletoes,
• Amyema pendula ( Drooping Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ), and
  Wattles ( Acacia, MIMOSACEAE ),
• Amyema preissii ( Wire-leaved Mistletoe ) on Wattles ( Acacia, MIMOSACEAE ),
• Amyema quandang ( Grey Mistletoe ) on Wattles ( Acacia, MIMOSACEAE ),
• Amyema queenslandica
• Amyema sanguinea ( Christmas Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ), and
  Wattles ( Acacia, MIMOSACEAE ),
• Amyema seemeniana
• Amyema thalassia ( Mangrove Mistletoe ) on Stilted Mangrove ( Rhizophora stylosa, RHIZOPHORACEAE ),

• Amylotheca dictyophleba,
• Amylotheca subumbellata on Rhodamnia trineura ( MYRTACEAE ),

• Atkinsonia ligustrina,

• Benthamina alyxifolia,

• Decaisnina congesta,
• Decaisnina signata on Swamp Banksia ( Banksia dentata, PROTEACEAE ), and
  Green Plum ( Buchanania obovata, ANARCARDIACEAE ).
• Decaisnina triflora,

• Dendrophthoe curvata on Pomegranate ( Punica granatum, PUNICACEAE ),
  Curtain Fig ( Ficus virens, MORACEAE ),
• Dendrophthoe glabrescens ( Bald Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ),
  and many other trees in about 20 genera,
• Dendrophthoe homoplastica on Silver Wattle ( Acacia holosericea, MIMOSACEAE ),
  Bottlebrush ( Callistemon, MYRTACEAE ),
• Dendrophthoe vitellina ( Long Flowered Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ),
  and many other trees in about 20 genera,

• Diplatia furcata on Woodland Paperbark ( Melaleuca nervosa, MYRTACEAE ),
• Diplatia grandibractea
• Diplatia tomentosa on Coolibah ( Eucalyptus microtheca, MYRTACEAE ),
  Broad-leaved Paperbark ( Melaleuca viridiflora, MYRTACEAE ),

• Lysiana exocarpi ( Harlequin Mistletoe )
• Lysiana linearifolia
• Lysiana maritima on CASUARINACAE,
• Lysiana murrayi on Wattles ( Acacia, MIMOSACEAE ),
• Lysiana subfalcata

• Muellerina bidwillii
• Muellerina celastroides ( Coast Mistletoe ) on Pear Tree ( Pyrus malus, ROSACEAE ),
• Muellerina eucalyptoides ( Creeping Mistletoe ) on Gum Trees ( Eucalyptus, MYRTACEAE ), and
  Wattles ( Acacia, MIMOSACEAE ),
• Muellerina myrtifolia