A new list of vascular plants for Whenua Hou/Codfish Island with notes on that island's floraNewsletter
Barkla, J., 2021, Trilepidea. Expand
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- Author: Barkla, J.
Brief notes on the vegetation of Spit Islands and associated beaches, southwest FiordlandBulletin
Barkla, J., 2022, Trilepedia. Expand
Conservation status of New Zealand indigenous vascular plantsDOC Publication
de Lange, P.; Rolfe, J.; Champion, P.; Courtney, S.; Heenan, P.; Barkla, J.; Cameron, E.; Norton, D.; Hitchmough, R., 2012, New Zealand Threat Classification Series. Expand
Conservation status of vascular plants in Aotearoa New Zealand, 2023
de Lange, P.J.; Gosden, J.; Courtney, S.P.; Fergus, A.J.; Barkla, J.W.; Beadel, S.M.; Champion, P.D.; Hindmarsh-Walls, R.; Makan, T.; Michel, P., 2024, New Zealand Threat Classification Series. Expand
Regional conservation status of indigenous vascular plants in Otago
Jarvie, S., Barkla, J., Rance, B., Rogers, G., Ewans, R., Thorsen, M., 2024, Otago Threat Classification Series. Expand
The rediscovery of Parahebe canescens (syn. Veronica lilliputiana) on the Otago PeninsulaPopular Article
Barkla, J., 2011, Trilepidea No. 88: March 2011. Expand
Threatened and uncommon plants of New Zealand [2009]Journal Paper
de Lange, P.J.; Norton, D.A.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Hitchmough, R.; Twonsend, A.J., 2009, New Zealand Journal of Botany. Expand