A synoptic revision of Diplazium in Rwanda is provided. Two species, Diplazium humbertii and D. z... more A synoptic revision of Diplazium in Rwanda is provided. Two species, Diplazium humbertii and D. zanzibaricum had already been recorded for the country. Here we describe D. cyamudongoense sp. nov. that can be readily distinguished by the long and brittle scales at the base of the stipe. A key to the species is provided. The spores of the three studied species are documented and compared.
The new species Lindernia adami-hefiedi from Madagascar, Montagne d’Ambre is described and illust... more The new species Lindernia adami-hefiedi from Madagascar, Montagne d’Ambre is described and illustrated. It differs from Lindernia rotundifolia, and related species in the dense indumentum with long-stalked glandular hairs, the matt leaves, the long pedicel, the large corolla and the long free staminodes. Additional material of the closely related species L. lemuriana, L. oblongifolia, L. rotundifolia and L. viguieri is studied and a key to the species of Lindernia s.str. in Madagascar is provided. Herbarium studies revealed that Ilysanthes oblongifolia is the oldest name for Lindernia paludosa, and the relevant new combination is made here.
Plants and other organisms have evolved structures and mechanisms for colonizing land since the E... more Plants and other organisms have evolved structures and mechanisms for colonizing land since the Early Ordovician. In this context, their surfaces, the crucial physical interface with the environment, are mainly considered barriers against water loss. It is suggested that extreme water repellency (superhydrophobicity) was an additional key innovation for the transition of algae from water to land some 400 mya. Superhydrophobicity enhances gas exchange on land and excludes aquatic competitors in water films. In a different context, in material science and surface technology, superhydrophobicity has also become one of the most important bioinspired innovations enabling the avoidance of water films and contamination. Here, we present data for an extremely water-repellent cyanobacterial biofilm of the desiccation tolerantHassallia byssoideaproviding evidence for a much earlier prokaryotic Precambrian (ca. 1–2 bya) origin of superhydrophobicity and chemical heterogeneities associated with...
Forty-four species of Asplenium and one species of Hymenasplenium are recorded for Rwanda. Three ... more Forty-four species of Asplenium and one species of Hymenasplenium are recorded for Rwanda. Three species, Asplenium markusbeckeri Eb.Fisch. & Lobin, A. ramicola Eb.Fisch. & Lobin, and A. uschiae Eb.Fisch. & Lobin are described as new to science. The new species are illustrated and their affinities are discussed. Eleven species represent new country records for Rwanda: Asplenium adiantum-nigrum var. adiantum-nigrum, A. africanum, A. boltonii, A. burundense, A. cancellatum, A. ceii, A. christii, A. inaequilaterale, A. lividum, A. trichomanes subsp. quadrivalens and Hymenasplenium kenyense. A key to all Aspleniaceae recorded from Rwanda is provided, and representative specimens from Rwanda are cited. The phytogeography of the Aspleniaceae of Rwanda is discussed. Two lectotypes are designated for Asplenium mildbraedii and A. trichomanes subsp. quadrivalens. Three species previously recorded for Rwanda (Asplenium goetzei, A. kassneri, A. lademannianum) are excluded from the flora.
The new species Lindernia sallyae from Tanzania, Mpanda District is described and illustrated. It... more The new species Lindernia sallyae from Tanzania, Mpanda District is described and illustrated. It differs from Lindernia linearifolia and L. monroi in the lack of basal rosulate leaves, the taller habit, the calyx with shorter tube and the acute lobes, the yellow corolla with purple marks and veins, the larger lower lip of the corolla, the longer abaxial stamens with acute anthers, and the glabrous adaxial stamens. The ecology of this probably poikilohydric species is briefly discussed. The endemic flora of the Uzondo Plateau, the type locality for this new Lindernia species, is highlighted.
A synoptic revision of Diplazium in Rwanda is provided. Two species, Diplazium humbertii and D. z... more A synoptic revision of Diplazium in Rwanda is provided. Two species, Diplazium humbertii and D. zanzibaricum had already been recorded for the country. Here we describe D. cyamudongoense sp. nov. that can be readily distinguished by the long and brittle scales at the base of the stipe. A key to the species is provided. The spores of the three studied species are documented and compared.
The new species Lindernia adami-hefiedi from Madagascar, Montagne d’Ambre is described and illust... more The new species Lindernia adami-hefiedi from Madagascar, Montagne d’Ambre is described and illustrated. It differs from Lindernia rotundifolia, and related species in the dense indumentum with long-stalked glandular hairs, the matt leaves, the long pedicel, the large corolla and the long free staminodes. Additional material of the closely related species L. lemuriana, L. oblongifolia, L. rotundifolia and L. viguieri is studied and a key to the species of Lindernia s.str. in Madagascar is provided. Herbarium studies revealed that Ilysanthes oblongifolia is the oldest name for Lindernia paludosa, and the relevant new combination is made here.
Plants and other organisms have evolved structures and mechanisms for colonizing land since the E... more Plants and other organisms have evolved structures and mechanisms for colonizing land since the Early Ordovician. In this context, their surfaces, the crucial physical interface with the environment, are mainly considered barriers against water loss. It is suggested that extreme water repellency (superhydrophobicity) was an additional key innovation for the transition of algae from water to land some 400 mya. Superhydrophobicity enhances gas exchange on land and excludes aquatic competitors in water films. In a different context, in material science and surface technology, superhydrophobicity has also become one of the most important bioinspired innovations enabling the avoidance of water films and contamination. Here, we present data for an extremely water-repellent cyanobacterial biofilm of the desiccation tolerantHassallia byssoideaproviding evidence for a much earlier prokaryotic Precambrian (ca. 1–2 bya) origin of superhydrophobicity and chemical heterogeneities associated with...
Forty-four species of Asplenium and one species of Hymenasplenium are recorded for Rwanda. Three ... more Forty-four species of Asplenium and one species of Hymenasplenium are recorded for Rwanda. Three species, Asplenium markusbeckeri Eb.Fisch. & Lobin, A. ramicola Eb.Fisch. & Lobin, and A. uschiae Eb.Fisch. & Lobin are described as new to science. The new species are illustrated and their affinities are discussed. Eleven species represent new country records for Rwanda: Asplenium adiantum-nigrum var. adiantum-nigrum, A. africanum, A. boltonii, A. burundense, A. cancellatum, A. ceii, A. christii, A. inaequilaterale, A. lividum, A. trichomanes subsp. quadrivalens and Hymenasplenium kenyense. A key to all Aspleniaceae recorded from Rwanda is provided, and representative specimens from Rwanda are cited. The phytogeography of the Aspleniaceae of Rwanda is discussed. Two lectotypes are designated for Asplenium mildbraedii and A. trichomanes subsp. quadrivalens. Three species previously recorded for Rwanda (Asplenium goetzei, A. kassneri, A. lademannianum) are excluded from the flora.
The new species Lindernia sallyae from Tanzania, Mpanda District is described and illustrated. It... more The new species Lindernia sallyae from Tanzania, Mpanda District is described and illustrated. It differs from Lindernia linearifolia and L. monroi in the lack of basal rosulate leaves, the taller habit, the calyx with shorter tube and the acute lobes, the yellow corolla with purple marks and veins, the larger lower lip of the corolla, the longer abaxial stamens with acute anthers, and the glabrous adaxial stamens. The ecology of this probably poikilohydric species is briefly discussed. The endemic flora of the Uzondo Plateau, the type locality for this new Lindernia species, is highlighted.
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