Hilliard collected specimens, mostly from the
Natal Drakensberg and
Malawi, number some 8000 (of which 5000 were collected with B. L. Burtt). She is commemorated in the 2 genera of
Hilliardia and
Hilliardiella (both in the
Asteraceae family). She is also honoured in
Plectranthus hilliardiae ,
Schizoglossum hilliardiae ,
Cymbopappus hilliardiae ,
Agalmyla hilliardiae and
Helichrysum hilliardiae ==Works==