Heenan, P.B. 2011: Taxonomic notes on the New Zealand flora: Hypericum gramineum and Hypericum involutum (Hypericaceae). New Zealand Journal of Botany 49(1): 133–139.
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| Heenan, P.B. 2011: Taxonomic notes on the New Zealand flora: Hypericum gramineum and Hypericum involutum (Hypericaceae). New Zealand Journal of Botany 49(1): 133–139. |