The genus Ecklonia, including Ecklon's kelp (Ecklonia biruncinata or E. radiata), as well as Ecklon's Purple Iceplant (Delosperma ecklonis 'Bright Eyes') and Ecklon's Everlasting (Helichrysum ecklonis) were named in his honour.
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Psychotria capensis (Eckl.) Vatke is a Southern African evergreen shrub or small tree occurring along the east coast from Knysna through the Eastern Cape and KwaZulu-Natal, Mpumalanga, Northern Cape, Mozambique and Zimbabwe.