Tea trees are native to Australia and produce fragrant oil with antifungal and vermicide properties.    From Wordnik.com.  [Head Lice Home Treatments ��� Remove Lice Easily] Reference

It is believed that she secured the poison from a vermicide in which arsenic was mixed with soft soap.    From Wordnik.com.  [She Stands Accused] Reference

I64, 179, 183, (from a vermicide) 186, I93, 200-20I,203,208,227,233,235; cantharides, 8I; diamond powder, 8I; great spiders, 8I; lapis costitus, 8I; mercury (metallic), I9, 8I, (corrosive sublimate), 78; phosphorus, I9; porridge, 236; "rosalgar," 78; strychnine, I9.    From Wordnik.com.  [She Stands Accused] Reference