Vanilla yanesha Damián, a new orchid species from Pasco, Peru is proposed. It is similar in overall morphology to V. mexicana Mill. However, V. yanesha is distinguished from the latter by its larger leaves, shorter inflorescence and labellum with a rounded middle lobe with 5–7 low, brownish keels. A line drawing and habitat information are provided as well as a comparison with morphologically similar species including a key to the Peruvian membranaceous-leaved species.

Citation: Damián Parizaca A. 2019: Vanilla yanesha (Orchidaceae), a new species of the membranaceous-leaved group from the central rainforest of Peru. – Willdenowia 49: 5–9. doi:  https://doi.org/10.3372/wi.49.49101

Version of record first published online on 1 March 2019 ahead of inclusion in April 2019 issue.

Mabberley D. J., Painting by numbers. The life and art of Ferdinand Bauer. – Sydney: NewSouth Books, 2017. – ISBN 978-1-74223-522-6. – 25 × 30.8 cm, 246 pp., many illustrations, hardback. – Price: GBP 46.95.

Citation: Lack H. W. 2019: Book review: Mabberley D. J., Painting by numbers. The life and art of Ferdinand Bauer. – Willdenowia 49: 11–12.doi:  https://doi.org/10.3372/wi.49.49102

Version of record first published online on 1 March 2019 ahead of inclusion in April 2019 issue.

This paper presents the European distribution of the understudied, host-specific rust fungus, Uromyces erythronii (Pucciniomycetes, Pucciniales, Pucciniaceae). Distribution data were derived from the survey of herbarium materials of its European host plant, Erythronium dens-canis. We demonstrate the presence of this rust fungus in 14 countries within the distribution area of its host. The temporal trend of emergence of the two rust fungus generations (aecia and telia) is presented. Based on the study of 1700 E. dens-canis individuals, we conclude that the overall infection rate has not changed significantly over the last 200 years. During field surveys, U. erythronii infection was detectable in most of the studied Erythronium populations (88.5%). A high similarity in the nrITS region was detected among samples from Europe (Croatia, Romania) and Asia (Japan).

Citation: Nagy T., Pfliegler W. P., Takács A., Tökölyi J. & Molnár V. A. 2019: Distribution, infection rates and DNA barcoding of Uromyces erythronii (Pucciniaceae), a parasite of Erythronium (Liliaceae) in Europe. – Willdenowia 49: 13–20. doi:  https://doi.org/10.3372/wi.49.49103

Version of record first published online on 14 March 2019 ahead of inclusion in April 2019 issue.

In order to evaluate the traditional morphological characters commonly used to distinguish the taxonomically problematic species of Legousia, we carried out a morphometric study with univariate analysis, principal component analysis (PCA), discriminant analysis (DA) and cluster analysis (UPGMA). The analyses were based on data from 436 individuals on 207 herbarium specimens from 18 countries in Europe, Africa and Asia representing all recently accepted species of the genus. Legousia falcata was found clearly distinct based on binary characters, L. falcata and L. hybrida were separated using refined binary and continuous characters, whereas L. pentagonia, L. snogerupii and L. speculum-veneris were all mixed in a single cluster, as were L. castellana, L. falcata and L. scabra. In a further refined sampling, L. snogerupii was separated by PCA, DA and UPGMA, but L. pentagonia and L. speculum-veneris were still indistinguishable and formed a single mixed cluster. Based on the results, we propose to reduce L. castellana and L. scabra to synonyms of L. falcata, and L. skvortsovii to a synonym of L. hybrida, while subspecific rank is proposed for L. pentagonia as L. speculum-veneris subsp. pentagonia, comb. & stat. nov. A key and nomenclatural synopsis of accepted taxa is provided and their geographic distribution is outlined.

Citation: Wahlsteen E. & Tyler T. 2019: Morphometric analyses and species delimitation in Legousia (Campanulaceae). – Willdenowia 49: 21–33. doi:  https://doi.org/10.3372/wi.49.49104

Version of record first published online on 25 March 2019 ahead of inclusion in April 2019 issue.

Viola beati, a hitherto unknown species of V. sect. Andinium (Violaceae) is described and illustrated. It is an inconspicuous, diminutive, perennial forb currently known from only one locality in NW Argentina. We draw attention to its morphology, ecology, rarity and endemism. The differences between V. beati and its apparently only close relative, V. singularis J. M. Watson & A. R. Flores, are defined.

Blackberries (Rubus subg. Rubus, Rosaceae) are perennial plants that form thickets of biennial spiny stems (canes), which grow in length in the first year and develop flowering laterals in the second year. In the present study, a hitherto overlooked separate type of stem is described, denoted as panicle shoot (PS, turio paniculatus) that occurs in several species of all three European blackberry sections. PSs are up to 2.5 m long, spring directly from the rootstock, terminate apically in a mostly large paniculate inflorescence (simple type) and may develop additional flowering branches (complex type). PSs can emerge from young (two-year old) and older rootstocks established sexually from seeds and vegetatively from tip-rooted canes, respectively. As a rule, they are biennially flowering shoots that develop flowering laterals in the second season. By virtue of their length, PSs tend to project with their panicles out of the surface of bushes and hence overcome the frequent fate of flowering laterals of low arching canes to become rapidly overgrown and overshadowed by surrounding vegetation.

Citation: Drenckhahn D. 2019: Panicle shoot, an overlooked stem type of several blackberries (Rubus, Rosaceae). – Willdenowia 49: 43–52. doi:  https://doi.org/10.3372/wi.49.49106

Version of record first published online on 29 March 2019 ahead of inclusion in April 2019 issue.

A morphometric study of populations from the central-southern Apennines and Sicily of the Italian endemic Corydalis densiflora has been undertaken, based on herbarium specimens and field research. A new subspecies, C. densiflora subsp. apennina, is described from the central Apennines. It differs from C. densiflora s.str. by its more divided leaves and bracts, basal leaf with more numerous and narrower leaflets, longer middle and lateral lobes of middle and upper bracts, narrower lower petal wing, shorter inner petals and shorter upper stamen.

Citation: Conti F., Bracchetti L., Uzunov D. & Bartolucci F. 2019: A new subspecies of Corydalis densiflora (Papaveraceae) from the Apennines (Italy). – Willdenowia 49: 53–64. doi:  https://doi.org/10.3372/wi.49.49107

Version of record first published online on 29 March 2019 ahead of inclusion in April 2019 issue.

Argyreia decemloba Traiperm, Fujikawa & Staples, a new species of Convolvulaceae from Natma Taung National Park, Chin State, Myanmar, is described here with detailed illustrations and summaries for its distribution, ecology and IUCN conservation status. This new species is a high-climbing twiner that can be distinguished by a white or pale yellow corolla with a deep red or purple-black colour inside at the base of the tube, a ten-lobed corolla limb, and staminal filament bases expanded and densely covered by hispid hairs. Argyreia decemloba is here assessed as Near Threatened (NT) following IUCN Red List categories.

Citation: Traiperm P., Fujikawa K., Chitchak N., Srisanga P., Maknoi C. & Staples G. 2019: A new species of Argyreia (Convolvulaceae) from Myanmar. – Willdenowia 49: 65–70. doi:  https://doi.org/10.3372/wi.49.49108

Version of record first published online on 8 April 2019 ahead of inclusion in April 2019 issue.

Two new species of Selaginella (i.e. S. ayitiensis and S. brigitteana) from Hispaniola Island are described. Illustrations are provided for both new species and their affinities are discussed. Selaginella ayitiensis was collected in the Massif de la Hotte, Haiti, and is characterized by its long-creeping stems, corrugate to bumpy leaf upper surfaces, broadly acute to obtuse or apiculate median leaf apices, and white megaspores. It is morphologically related to the “Selaginella flexuosa group”. Selaginella ayitiensis differs chiefly from S. denudata and S. krugii (the only two other members of the “Selaginella flexuosa group” in the Greater and Lesser Antilles) by the shape of the median and lateral leaves apices. Selaginella brigitteana is known from different localities in the Dominican Republic and Haiti; it can be distinguished by its long-creeping, 2–4-branched stems, coriaceous leaves with the upper surfaces glossy, the median leaves with broadly hyaline, long-ciliate margins, and short-acuminate apices tipped by 2 or 3 cilia, and light yellow to cream megaspores. Selaginella brigitteana differs from S. leonardii, with which it has been confused in the past, by its broadly ovate median leaves with rounded, non-auriculate, and glabrous outer bases, submarginal and marginal stomata along proximal ½ of outer halves of the laminae, and with the upper surfaces glossy, comprising rounded and rectangular to elongate cells, many of which are papillate.

An account of the discovery of the Albanian stenoendemic Asyneuma comosiforme and brief nomenclatural history of the genus Asyneuma provide a background for the re-assessment of recent molecular findings, which advocate the transfer of A. comosiforme to the genus Campanula. Objections to this transfer are raised, and additional morphological details and arguments are provided, highlighting the uniqueness of this taxon, in order to support a proposal to recognize and validate the monotypic genus Hayekia. A full generic diagnosis, and an expanded species description are provided, in addition to chromosome number, ecological and conservation data. Comments about cladistic analyses and general-purpose Linnaean classifications are made, as well as a recommendation for the recognition of monotypic genera for a better understanding of Campanulaceae evolution.

Citation: Lakušić D., Eddie W. M. M., Shuka L., Lazarević M. & Barina Z. 2019: The evolving “fate” of Asyneuma comosiforme: validation of Hayekia, a new monotypic genus of Campanulaceae from Albania. – Willdenowia 49: 81–93. doi:  https://doi.org/10.3372/wi.49.49110

Version of record first published online on 17 April 2019 ahead of inclusion in April 2019 issue.

This is the tenth of a series of miscellaneous contributions, by various authors, where hitherto unpublished data relevant to both the Med-Checklist and the Euro+Med (or Sisyphus) projects are presented. This instalment deals with the families Amaranthaceae, Campanulaceae, Caryophyllaceae, Chenopodiaceae, Compositae, Crassulaceae, Cruciferae, Cyperaceae, Ericaceae, Euphorbiaceae, Gramineae, Labiatae, Leguminosae, Moraceae, Nyctaginaceae, Orobanchaceae, Pittosporaceae, Solanaceae, Verbenaceae and Vitaceae. It includes new country and area records and taxonomic and distributional considerations for taxa in Acacia (Vachellia), Airopsis, Amaranthus, Bougainvillea, Bromus, Carex, Cerastium, Citharexylum, Clinopodium, Datura, Euphorbia, Ficus, Hieracium, Hypopitys, Kalanchoe, Lobelia, Parthenocissus, Phelipanche, Pittosporum, Polypogon, Rorippa, Spinacia and Symphyotrichum, and a new combination in Clinopodium.

Citation

For the whole article:

Raab-Straube E. von & Raus Th. (ed.) 2019: Euro+Med-Checklist Notulae, 10 [Notulae ad floram euro-mediterraneam pertinentes No. 39]. – Willdenowia 49: 95–115. doi:  https://doi.org/10.3372/wi.49.49111

For a single contribution (example):

Ryff L. 2019: Amaranthus viridis L. – P. 96 in: Raab-Straube E. von & Raus Th. (ed.), Euro+Med-Checklist Notulae, 10 [Notulae ad floram euro-mediterraneam pertinentes No. 39]. – Willdenowia 49: 95–115. doi:  https://doi.org/10.3372/wi.49.49111

Version of record first published online on 17 April 2019 ahead of inclusion in April 2019 issue.

Gladiolus mariae Burgt (Iridaceae), a new species from Guinea, West Africa, is described and illustrated. The new species is placed in Gladiolus sect. Decorati Goldblatt and compared with the nine species already known from that section. Flowering plants stand 28–160 cm high with 1–6 bright orange flowers, opening one at a time. The ecology of the new species is discussed in detail, and a description of the vegetation in the region is provided. Gladiolus mariae is at present known only from two uninhabited sandstone table mountains in the Kounounkan Massif, Forécariah Prefecture. About 210 plants were found, on rocky soils at altitudes of 650–1100 m. The majority of plants, about 160, were found in fire-free shrubland, in five patches of 1–4 ha each, dominated by fire-sensitive plant species, but grasses are infrequent. Gladiolus mariae seems vulnerable to grassland fires. The area of occupancy is 28 km². The species is assessed to the IUCN category Endangered.

Citation: Burgt X. M. van der, Konomou G., Haba P. M. & Magassouba S. 2019: Gladiolus mariae (Iridaceae), a new species from fire-free shrubland in the Kounounkan Massif, Guinea. – Willdenowia 49: 117–126. doi:  https://doi.org/10.3372/wi.49.49112

Version of record first published online on 17 April 2019 ahead of inclusion in April 2019 issue.

The genus Tamarix (Tamaricaceae) is a lineage of shrubs and trees with leaves reduced to scales and numerous species adapted to moist and often saline soils in arid and semi-arid climates. Extensive morphological variation and hybridization complicate species delimitation and identification. Based on both morphological and DNA sequence characters, Tamarix humboldtiana Akhani, Borsch & N. Samadi is described as a new species from S Iran. Phylogenetic analysis of plastid rpl16 intron and trnG-trnS spacer sequences depicts a sister group relationship of its unique plastid haplotype to T. tetrandra, whereas nuclear ITS sequence data show close affinities to T. kotschyi. The new species differs from T. kotschyi by distinctly pedicellate, 5-merous flowers and vaginate-amplexicaul leaves. The stem and foliar anatomy and the epidermal micromorphology provide additional characters differentiating the new species from T. kotschyi. The gametic chromosome number of n = 12 reflects that of most of other species of the genus. Tamarix humboldtiana is a rare species living at freshwater riversides in S Iran and is according to current knowledge critically endangered.

Citation: Akhani H., Samadi N., Noormohammadi A. & Borsch Th. 2019: A new species of Tamarix (Tamaricaceae) from Hormozgan Province, S Iran, supported by morphology and molecular phylogenetics. – Willdenowia 49: 127–139. doi:  https://doi.org/10.3372/wi.49.49113

Version of record first published online on 17 April 2019 ahead of inclusion in April 2019 issue.