Anales del Jardín Botánico de Madrid

Kalanchoe dineshii (Crassulaceae), a new species from southern Western Ghats, India

2023-01-25T09:41:52+01:00

A new species of Kalanchoe (Crassulaceae), K. dineshii Syam Radh & Nampy, is described and illustrated. The new species occurs in the Mathikettan Shola National Park in southern Western Ghats, Kerala, India, and it is only known from the Idukki district. It is morphologically most similar to K. bhidei, but distinguished from the latter by its small stature (30-40 cm high), obovate to obtrullate sessile leaves adnate to stem in the basal ¼^th, and widely ovate calyx lobes. Information is also given on the distribution, habitat, phenology, and conservation status of the new taxon.

A new species of Stenospermation (Araceae) endemic to Isla del Coco, Costa Rica

2023-01-25T11:00:28+01:00

A new species of Stenospermation (Araceae), S. coques sp. nov., endemic to the Isla del Coco National Park in Costa Rica is described and illustrated. A discussion about morphologically related species and their differences is also included.

Polygala idukkiana (Polygalaceae), a new species from the southern Western Ghats, India

2022-12-14T13:29:09+01:00

Polygala idukkiana (Polygalaceae) is described as a new species from the Idukki district of Kerala in the southern Western Ghats. Detailed description along with colour photographs, distribution map, and key to the identification of Polygala species occurring in Kerala are provided. The new species is compared with the morphologically allied P. sibirica, P. rosmarinifolia, and P. chinensis. The conservation status of the new species is assessed provisionally as Data Deficient (DD) according to IUCN Red List Categories and Criteria.

Characterization of Mediterranean endemics in the Egyptian flora

2022-10-11T14:42:36+02:00

The Mediterranean Basin is the world’s second richest hotspot, and one of the most important locations on the planet for endemic taxa. However, there is no available up-to-date list of Mediterranean endemics. Available data are frequently insufficient or outdated. Therefore, this study aimed at delimiting the Mediterranean floristic region in Egypt, screening its Mediterranean endemics, and determining their habitats, life forms, flowering periods, dispersal types and phyto-geographical distribution. From a list of 275 Mediterranean endemic taxa in Egypt compiled from literature, this study reduced it to 57 taxa (including species, subspecies and varieties; 20.7%) belonging to 46 genera and 22 families. Fifteen major habitats harbored Mediterranean endemics in Egypt, with coastal dunes (17 taxa = 29.8%) and non-saline depressions (16 taxa = 28.1%) being the most represented. Moreover, the Mareotis (west) subsector was the richest (46 taxa = 80.7%). The largest number of taxa was recorded in North African sub-region (52 taxa = 91.2%), followed by Eastern (levant) sub-region (36 taxa = 63.2%). Therophytes were the most recorded life form, while ballochory was the most represented dispersal type. In conclusion, it is crucial to shed the light on Mediterranean endemics and provide an up-to-date documented database to help future management plan that support their conservation and sustainable use.

Assessment of the breeding system in the Algerian narrow coastal endemism Anacyclus linearilobus (Anthemideae, Asteraceae)

2022-10-11T14:42:01+02:00

The breeding system of Anacyclus linearilobus, an annual and endemic species restricted to dune ecosystems of the Algerian coast were assessed through the effect of self-fertilization and intra- and inter-population artificial crosses on the probability of producing viable seeds in 20 individuals from two populations in a common garden. The breeding system was determined for each individual by the self-incompatibility index (ISI). These results were compared with those published for other species of the genus, A. clavatus, A. homogamos and A. valentinus. Results of experimental crosses showed that there was high variation in the female reproductive success between individuals of A. linearilobus, like that found in its sister species, A. valentinus. Unlike the other species in the genus that are self-incompatible, A. linearilobus showed a mixed mating system, with a majority of self-incompatible individuals, others partially self-incompatible and some self-compatible. We argue that this strategy may be related to reproductive assurance in this endemic, annual species whose effective population size has been reduced probably due to individual mating incompatibilities.

Synopsis of the genus Tamarix (Tamaricaceae) in the Iberian Peninsula and Balearic Islands

2022-12-22T09:12:13+01:00

A taxonomic revision of the genus Tamarix for the Iberian Peninsula and Balearic Islands is provided, updating the Flora iberica account published in 1993. A new dichotomous key for the Iberian and Balearic species is also included. The presence of certain number of species previously cited for the study area (T. arborea, T. canariensis, T. dalmatica, T. mannifera, T. mascatensis, T. meyeri, T. octandra, T. rosea, and T. tetragyna) is discarded or considered doubtful. Seven species are accepted: three of them are native (T. africana, T. boveana, and T. gallica) and one species (T. parviflora) was probably introduced over a century ago. Three more species (T. aphylla, T. chinensis, and T. ramosissima) have been introduced more recently. Two of them, Tamarix chinensis and T. ramosissima, are grouped as T. gr. ramosissima due to their high morphological resemblance. A new hybrid between T. boveana and T. gallica is also described under the name of Tamarix × verae.