Three new species and some nomenclatural changes in Senecio (Compositae/Asteraceae: Senecioneae) in the Flora Zambesiaca area

SummaryThree new Senecio species are described, S. fanshawei from Zambia, S. ngandae from Malawi and S. nyangani from Zimbabwe. A new combination is made under S. brachypodus and a taxon is added to the synonymy of this species; single taxa are added for the first time to the synonymy of S. coronatus and S. purpureus, and two taxa each are added for the first time to the synonymy of S. hochstetteri and S. triactinus.

Warneckea albiflora, a new species of W. subgenus Carnosae (Melastomataceae—Olisbeoideae) from coastal dry forest in northern Mozambique

Described and illustrated is Warneckea albiflora R.D. Stone & N.P. Tenza, another localized endemic of coastal dry forest near Quiterajo in Mozambique’s Cabo Delgado Province. In Flora Zambesiaca the new species would key to Memecylon sansibaricum Taub. [≡Warneckea sansibarica (Taub.) Jacq.-Fél.], but is distinguished by its elliptic-lanceolate, attenuate–acuminate leaves and white flowers borne on pedicels 3.5–4 mm long (versus leaves elliptic and rounded to shortly and obtusely acuminate, pedicels 6–15 mm long, and flowers pale blue to deep blue in Warneckea sansibarica). Because of its evidently very limited occurrence as well as on-going anthropogenic threats, Warneckea albiflora is provisionally assessed as Critically Endangered (CR) B1ab(iii) according to IUCN criteria. A key is provided to the Mozambican species of Warneckea.

Distributional data for the Pteridophyta in Zambia

477 records on the occurrence of 144 species of the <i>Pteridophyta</i> in each of Zambia's eight provinces are presented, 213 of them being additions to those contained in Schelpe's account in <i>Flora Zambesiaca</i> (1970).