Published November 11, 2025
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FIGURE 4 in Petalidium sebrabergense (Acanthaceae), a new species from Namibia
Authors/Creators
- 1. Independent Researcher, P.O. Box 21168, Windhoek, Namibia & H.G.W.J. Schweickerdt Herbarium, Department of Plant and Soil Sciences, University of Pretoria, Pretoria, 0002 South Africa & Ongava Research Centre, Private Bag 12041, Windhoek, Namibia
- 2. H.G.W.J. Schweickerdt Herbarium, Department of Plant and Soil Sciences, University of Pretoria, Pretoria, 0002 South Africa & South African National Biodiversity Institute, Private Bag X101, Pretoria, 0001 South Africa
Description
FIGURE 4. Petalidium sebrabergense. Morphology of leaves: relatively broad (A–C) and narrow-leaved forms (D). A. Shoot bearing entire-margined leaves; the older, proximal leaves have a relatively dense, but not matted, greyish indumentum likely developed under drier conditions, while the younger, distal leaves are nearly glabrous and bright green, having formed after significant rainfall. B. Shoot with leaves produced following favourable rainfall, some exhibiting denticulate or crenulate-serrate margins. C. Actively growing tip of a shoot under optimal soil moisture conditions, displaying leaves with crenulate-serrate margins. D. Leaves of narrow-leaved form. Photographs by W. Swanepoel.
Notes
Published as part of Swanepoel, Wessel & Van Wyk, Abraham E., 2025, Petalidium sebrabergense (Acanthaceae), a new species from Namibia, pp. 17-30 in Phytotaxa 728 (1) on page 22, DOI: 10.11646/phytotaxa.728.1.2, http://zenodo.org/record/18416767
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