Search Results

You are looking at 1 - 10 of 15 items for

  • Keyword: phytogeography x
Clear All Modify Search
Open access

Mesut Kırmacı and Adnan Erdağ

Abstract

Acaulon fontiquerianum Casas & Sérgio (Pottiaceae) is reported for the first time from Turkey and Southwest Asia. The species is briefly described and illustrated, and a key for Turkish Acaulon Müll. Hal. species is provided. The distribution of all Acaulon species known from Turkey is presented.

Open access

Eugene A. Borovichev, Vadim A. Bakalin and Masanobu Higuchi

Abstract

The discovery of Mannia androgyna (L.) A. Evans in Russian Asian and Japanese localities changes the conception of the distribution patterns of the taxon, previously regarded as principally a Mediterranean species. A description and illustrations based on specimens collected in Russian Asia and Japan are provided. The history of the taxonomic understanding of Mannia androgyna is briefly reviewed, and features differentiating closely related species are discussed.

Open access

Anna Kalinka, Stephen Mifsud, Agnieszka Popiela and Magdalena Achrem

Abstract

Elatine gussonei (Sommier) Brullo is an endemic species, with a distribution restricted to the central part of the Mediterranean Basin (Maltese islands, Lampedusa, southern part of Sicily). This hydrophyte grows in rainwater pools and cavities in karstic limestone. Although the morphology has been well studied, no karyological study has been carried out, and hence this work brings the first chromosome data for the Maltese-pelago endemic E. gussonei.We have found a diploid number of 54 chromosomes in E. gussonei, which differs from the chromosome number of most of Elatine species (2n = 36). Additionally, this account gives a recent distribution of the species on the Maltese islands.

Open access

Кomiljon S. Тojibaev, Natalia Yu. Beshko, Orzimat T. Turginov, Farkhod I. Karimov, Avazbek Batashov, Mansur Usmanov and Marcin Nobis

Abstract

The Republic of Uzbekistan is a Central Asian country with rich native flora. The territory belongs to the Irano-Turanian region in the Ancient Mediterranean floristic subkingdom of Holarctic. The flora of Uzbekistan accounts over 4300 species of vascular plants including large numbers of endemic species, but the check-list is still incomplete. Presented here ten new records to the flora of Uzbekistan, were found during the field studies and examination of herbarium collections preserved at TASH.

Open access

Nadezhda Konstantinova and Anatoliy Savchenko

Abstract

The distribution in the Russian part of the Caucasus of 14 hepatic species rare and threatened in Europe is discussed and mapped based on literature records and specimens collected by the authors. Solenostoma caucasicum (Váňa) Konstant. is recorded as new for the Russian part of the Caucasus. New localities for Clevea spathysii (Lindenb.) Müll. Frib., Frullania parvistipula Steph., Frullania bolanderi Austin, Scapania carinthiaca J. B. Jack ex Lindb., S. verrucosa Heeg. and Lophozia ascendens (Warnst.) R. M. Schust. are reported. Their ecology, phytogeography and mode of dispersal in the Caucasus are discussed.

Open access

Elena A. Ignatova, Jan Kučera, Oxana I. Kuznetsova and Michael S. Ignatov

Abstract

Hydrogonium gregarium (Mitt.) Jan Kučera, previously known from Southeast Asia, Japan, and scattered occurrences in Pacific North America south to Mexico, is reported for the first time in Russia from the central part of Yakutia at the western foothills of the Verkhoyansk Range. Both morphology and nuclear ITS sequence data confirm its identity with H. gregarium var. gregarium. The species is described and illustrated, and its habitat is briefly discussed.

Open access

Igor Dakskobler, Andrej Seliškar and Branko Vreš

Southeastern-Alpine endemic Leontodon hispidus subsp. brumatii (Cichoriaceae) in the Sava valley (central Slovenia)

In the spring and summer of 2010 a number of new localities of the southeastern-Alpine endemic Leontodon hispidus subsp. brumatii were found on temporarily flooded riparian rocks in the gorge of the Sava River between the village of Sava and Zidani Most (central Slovenia). The species has so far been known only in northeastern Italy and western Slovenia (the Soča valley). In order to obtain more specific information its sites were studied phytosociologically and the communities in which it grows in the Sava and the Soča valleys compared. Two new associations were described on the basis of these comparisons: Triseto argentei-Leontodontetum brumatii ass. nov. and Leontodonti brumatii-Seslerietum calcariae ass. nov. As this endemic taxon and its endemic communities are a characteristic of riparian flora and vegetation of some Slovenian mountain rivers and as its localities in the Sava valley are explicitly disjunct and the southeastern-most in the entire known distribution area, they deserve to be studied and protected.

Open access

Eugene A. Borovichev and Vadim A. Bakalin

Abstract

Mannia levigata Shimizu & S. Hatt. is reported for Russia based on a recent collection from Primorsky Territory. This species was known from Japan and was treated as a Japanese endemic. Here it is described, illustrated and differentiated from other species of Mannia Opiz.

Open access

Justyna Wiland-Szymańska

The genus Hypoxis L. (Hypoxidaceae) in the East Tropical

A complete key with full descriptions and distributions of all known Hypoxis taxa found in the East Tropical Africa is presented in the monograph. The morphology of all species, subspecies and varieties is described, including such important taxonomic characters for this genus like tuber flesh color, tunic type, indumentum and seed testa sculpture. A succulent leaf structure is described for H. kilimanjarica var. prostrata. The anatomical studies were conducted as a part of taxonomical analysis. They have positively evaluated a taxonomic significance of leaf anatomy characters, such as succulent structure, occurrence of bulliform cells in epidermis outside the keel zone, type and distribution of trichomes. The studies of the Hypoxis leaf anatomy added new data concerning anatomical differentiation of the cataphylls and the inner leaves. Also differentiated mesophyll and simultaneous presence of different types of stomata on one leaf are reported. It has been shown that in some species mucilage canals are present in the inner leaves and that this character is not constant. The number of vascular bundles, which can be determined only on the basis of a leaf section, is useful only in species with a small number of veins, not increasing with a plant age. Because of lack of constancy in distribution, number of stomata accessory cells cannot be used as a diversifying character for the East African species of Hypoxis. The wax crystals are revealed to exist in many species of Hypoxis. The anatomical characters of scapes were also studied in a taxonomic context. A sclerenchyma distribution, as well as number of vascular bundles can be used for a species determination. The presence of sclerenchyma prevents the scapes from bending down after anthesis. The studies of phenology revealed that there are two groups of taxa, one with a resting period and the other without it. It is connected with a climate in which the species occurs. The study of distribution maps of the species occurring in the East Africa are provided for this area, as well as for their entire range. This new knowledge, along with a revision of literature data, led to a new conclusion as to a number of all Hypoxis species in Africa, which is now estimated to be 55. The revision demonstrates that distribution of many of the Hypoxis species is connected with White's phytochoria. It proves that not only South Africa, but also the Zambesian Region is a very important center of diversity of this genus. The number of endemic taxa of Hypoxis for the East Tropical Africa is very low, including only one species and one subspecies. Additionally, a study of vertical ranges of Hypoxis is presented. It reveals that most of the species in East Africa grow in the mountains and they show preferences of dispersal in particular altitudinal levels. The analysis of the vertical distribution within the entire ranges of different taxa has showed differences in the altitudinal position depending on the geographic location. The human influence on Hypoxis is studied in terms of their use in folk medicine and believes. Most of the species of Hypoxis survive quite well in East Africa, being a visible component of various types of grasslands. Some species however are under threat of extinction. This is due to their incapability of surviving in changed habitats, especially in shade of cultivated plants. Another threat is a large-scale collection of species believed to cure the HIV, or sold as a substitute of similar taxa, assumed to possess such qualities. The IUCN categories are proposed for the East African taxa of Hypoxis.

Open access

Eugene A. Borovichev and Vadim A. Bakalin

Abstract

For Riccia nipponica S. Hatt., previously regarded as a Japanese endemic, the paper gives the first records from the southern flank of the Russian Far East and Guizhou Province of China. These records considerably enlarge its known distribution area. New data on its morphological variability, ecology and distribution patterns are summarized and analyzed based on study of available material from East Asia. A morphological description and figures are given, with a key in table form for it and related taxa. Although closely related to the sub-cosmopolitan R. crystallina L., R. nipponica merits species rank.