Andre maintains and updates the plant identification website, VicFlora, produced by the Royal Botanic Gardens, and co-ordinates the Victorian Conservation Seedbank (VCS), which is located within the National Herbarium of Victoria. His work includes flora writing for VicFlora and the Flora of Australia online, undertaking threatened species assessments, plant specimen collection for the Herbarium, as well as seed collection, cleaning, storage and maintenance of the seed collection database for the VCS. His research interests are in the taxonomy of flowering plants in south-eastern Australia, principally in the daisy genus Olearia.
Messina, A., Walsh, N.G. (in press) Reinstating Olearia stricta (Asteraceae) for an uncommon shrub from montane regions of South East Australia, and notes on O. ramulosa.
Thiele K.R., de Salas M.F., Walsh N.G., Messina A., Little R.J., Prober S.M. (2018) Viola curtisiae, a new rank for a poorly understood species, with notes on V. hederacea subsp. seppeltiana. Muelleria 36, 107–111.
Stajsic V., Walsh N.G., Douglas R., Messina A., Molloy B.P.J. (2015) A revision of Melicytus (Violaceae) in mainland Australia and Tasmania. Australian Systematic Botany 27, 305–323.
Messina A., Walsh N.G., Hoebee S.E., Green P.T. (2014). A revision of Olearia section Asterotriche (ASTERACEAE: ASTEREAE). Australian Systematic Botany 27, 199–240.
Messina A., Callahan D.L., Walsh N.G., Hoebee S.E., Green P.T. (2014). Testing the boundaries of closely related daisy taxa using metabolomic profiling. Taxon 63, 367–376.
Messina A., Walsh N.G., Hoebee S.E., Green P.T. (2013). A morphological assessment of the Olearia phlogopappa complex (Asteraceae: Astereae). Australian Systematic Botany 26, 31–80.
Messina A., Walsh N.G., Whiffin T. (2010). Recognition of a new species of Pomaderris (Rhamnaceae) in eastern Victoria based on morphological and chemical data. Muelleria 28, 136–145.
Messina A, Hirst, M, Walsh NG (2017). Getting by with a little help from my friends. Samara 30, 13.
Rumpff L., Coates F., Messina A., Morgan J. (2008). Potential biological indicators of climate change: Evidence from phenology records of plants along the Victorian Coast. Arthur Rylah Institute Technical Report Series No. 175, Department of Sustainablity and Environment (Melbourne).