Original Research

Three new species of Diascia (Scrophulariaceae) from the western Cape

K. E. Steiner
Bothalia | Vol 22, No 1 | a815 | DOI: https://doi.org/10.4102/abc.v22i1.815 | © 1992 K. E. Steiner | This work is licensed under CC Attribution 4.0
Submitted: 10 October 1992 | Published: 14 October 1992

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K. E. Steiner, Compton Herbarium, National Botanical Institute, South Africa

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Three annual Diascia species are described from the western Cape. Two species, D maculata K.E. Steiner and D. humilis K.E. Steiner have small flowers and are closely related.  D. maculata is characterized by a slightly gibbous corolla with no spurs or sacs, erect stamens, and a distinct patch of oil-secreting trichomes in the tube at the base of each upper and lateral corolla lobe. D. humilis is characterized by a bisaccate corolla, forward projecting stamens and oil-secreting trichomes localized in corolla sacs. The third new species,  D hexensis K.E. Steiner, is most similar to D. sacculata Benth.. but it differs from that species by its larger flowers and much longer spurs which curve downward instead of upward.


breeding system; <i>Diascia</i>; new species; Scrophulariaceae


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