Wallichii, a specific epithet honouring Danish botanist Nathaniel Wallich, may refer to:
Plants
Allium wallichii, commonly known as Jimbur or Himalaya onion Apostasia wallichii, a species of orchid Bulbophyllum wallichii, a species of orchid Castanopsis wallichii, a species of plant in the family Fagaceae Dioscorea wallichii, a climber in the family Dioscoreaceae Diospyros wallichii, a tree in the family Ebenaceae Dombeya wallichii, commonly known as pinkball, pink ball tree, or tropical hydrangea Horsfieldia wallichii, a species of plant in the family Myristicaceae Ligusticum wallichii, a flowering plant in the carrot family known for its use in traditional Chinese medicine Memecylon wallichii, a species of plant in the family Melastomataceae Rhododendron wallichii, a rhododendron species Schima wallichii, an Asian species of evergreen trees belonging to the tea family, Theaceae Sorbus wallichii, a species of plant in the family Rosaceae Strobilanthes wallichii, commonly known as Kashmir acanthus, hardy Persian shield, wild petunia, or kandali Valeriana wallichii, an herb of the family Valerianaceae, also called Indian valerian or tagar-ganthoda Widdringtonia wallichii, commonly known as Clanwilliam cedar or Clanwilliam cypress (correct name Widdringtonia cedarbergensis)
Animals
Brahmaea wallichii, a moth in the family Brahmaeidae Catreus wallichii, commonly known as the cheer pheasant or Wallich's pheasant Thysia wallichii, a beetle in the family Cerambycidae