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2023
Journal article
Revisiting an ecophysiological oddity: Hydathode‐mediated foliar water uptake in Crassula species from southern Africa.
Hydathodes are usually associated with water exudation in plants. However, foliar water uptake (FWU) through the hydathodes has long been suspected in the leaf‐succulent genus (Crassulaceae), a highly diverse group in southern Africa, and, to our knowledge, no empirical observations exist in the literature that unequivocally link FWU to hydathodes... -
2024
Journal article
New and poorly known taxa of Indigofera (Fabaceae, Papilionoideae, Indigofereae) from the Pondoland Centre of Endemism, South Africa: Part 2.
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2023
Journal article
Cell wall polysaccharide and glycoprotein content tracks growth‐form diversity and an aridity gradient in the leaf‐succulent genus.
Cell wall traits are believed to be a key component of the succulent syndrome, an adaptive syndrome to drought, yet the variability of such traits remains largely unknown. In this study, we surveyed the leaf polysaccharide and glycoprotein composition in a wide sampling of species that occur naturally along an... -
2023
Journal article
Phylogenomics sheds new light on the drivers behind a long‐lasting systematic riddle: the figwort family Scrophulariaceae.
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2022
Journal article
A new sectional classification of Lachenalia (Asparagaceae) based on a multilocus phylogeny.
(Asparagaceae; Scilloideae; Hyacintheae) is a large and morphologically diverse genus of more than 140 bulbous species endemic to southern Africa. Previous attempts to infer a well‐resolved and robustly supported phylogeny of using Sanger sequencing of candidate loci and/or morphological characters have been largely unsuccessful. Consequently, the current infrageneric classification is...Duncan, Graham D. ; Schlichting, Carl D. ; Forest, Félix ; Ellis, Allan G. ; Lemmon, Alan R. …
High-throughput sequencing, Molecular systematics, Southern Africa, and Lachenalia
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2020
Journal article
Southern Africa as a ‘cradle of incense’ in wider African aromatherapy.
The modern paradigm of aromatherapy is based on in vitro assays of pure volatile organic compounds (as an essential oil), with activity at non-clinically significant concentrations. Yet traditional use of aromatic species did not involve pure essential oils because hydrodistillation was only invented in relatively recent times (estimated 1200 AD)....