<abstract xmlns="http://www.w3.org/1999/xhtml">

In Govci under Mt. Poldanovec above the Trebuša Valley we found a new locality of southeastern-Alpine (Alpic) endemic <italic>Spiraea decumbens</italic> subsp. <italic>tomentosa</italic>, which is new to the flora of Slovenia and the Dinaric Alps. Its closest known localities are in the western Julian Prealps in Northeastern Italy. A small population of several ten shrublets occurs at elevations of about 570 m in shady, almost vertical dolomite rocks, in a stand of the endemic association <italic>Phyteumato columnae-Primuletum carniolicae.</italic> Despite a very small population we assume there are other localities in this area, where numerous gorges are very difficult to acces and have therefore not yet been sufficiently studied.
</abstract>

<italic>Spiraea decumbens</italic> Koch subsp. <italic>tomentosa</italic> (Poech) Dostál, novelty for the flora of Slovenia and the Dinaric Alps

<abstract xmlns="http://www.w3.org/1999/xhtml">

A research was conducted in the Veneto region (NE-Italy) inside kitchen gardens and potato fields of outer pre-Alps, and in asparagus fields on the low Po plain near the Adriatic coast, in late summer-autumn after harvesting. Original vegetation-plot records were compared with historic and recent materials from Italy, especially N-Italy, and with comparable associations from Central and South-Eastern Europe, to ensure a consistent syntaxonomical frame of this highly dynamic vegetation.
At the same time it was possible to shed light on the actual occurrence of past coenoses, cited by Italian authors for the Po plain. The analysis not only confirmed the occurrence of <italic>Echinochloo-Setarietum pumilae</italic> in north-eastern Italian territories, but also showed that it was more extensive than previously thought.
It also confirmed the persistence of <italic>Panico-Polygonetum persicariae</italic>. The historical presence of <italic>Veronico-Lamietum hybridi</italic> occurring in pre-Alps and Dolomites needs confirmation. Further regional-scale investigations of summer crop weed vegetation appear necessary.
</abstract>

Post-harvesting late summer-autumn weed vegetation in small size arable fields in Veneto: new insights into root crop communities in North East Italy

<abstract xmlns="http://www.w3.org/1999/xhtml">

A population of <italic>Atriplex micrantha</italic> subsp. <italic>micrantha</italic> was found in Valle d’Aosta region representing the first north-western Italian record and the second one at national level. The newly found population (about 100 individuals) covers an area of about 200 m2, and grows on uncultivated and saline lands at 950 m. Despite the inland locality (the species naturally grows in saline places), its occurrence is probably linked to the use of salt-spreading vehicles. Concerning <italic>A. oblongifolia</italic>, only one Italian record was published up to now (in 1898 in Emilia-Romagna region) but neither any herbarium specimen was traced nor plants were discovered after field surveys. Finally, we studied in detail the types of <italic>A. micrantha</italic> subsp. <italic>micrantha</italic>, <italic>A. oblongifolia</italic>, and <italic>A. heterosperma</italic>. Lectotypes were designated for <italic>A. micrantha</italic> and <italic>A. oblongifolia</italic> (Ledebour’s and Waldstein &amp; Kitaibel’s illustrations), whereas we correct Schwarz’s typification for <italic>A. heterosperma</italic> (Art. 9.10 ICN).
</abstract>

Studies on the genus <italic>Atriplex</italic> (Chenopodiaceae) in Italy VII. <italic>Atriplex micrantha</italic> and <italic>A. oblongifolia</italic>

<abstract xmlns="http://www.w3.org/1999/xhtml">

There are 96 species of the genus <italic>Carex</italic> (Cyperaceae) known in the flora of Ukraine, but so far there are no data about its hybrids for the country yet. However, the first one, <italic>C. × takhtadjanii</italic> [<italic>C. diluta</italic> × <italic>C. distans</italic>], was discovered in Starobilsk town (Luhansk region) during a field investigation in 2021. Detailed information about this floristic finding with the description of morphological characters of this hybrid and its habitat is given. Also a map with known locations of <italic>C. × takhtadjanii</italic> around the world is compiled, as well as the main morphological differences between this hybrid and its parental species are reported.
</abstract>

Luhansk Taras Shevchenko National University

<italic>Carex</italic> × <italic>takhtadjanii</italic> (<italic>Carex diluta</italic> × <italic>C</italic>. <italic>distans</italic>; <italic>Cyperaceae</italic>), a new hybrid for the flora of Ukraine

<abstract xmlns="http://www.w3.org/1999/xhtml">

The leaves of different species of the genus <italic>Artemisia</italic> show considerable inner and external structural diversity. This paper presents a comparative study of the micromorphological features of leaf surface for seven species from different regions of Ukraine: <italic>A. absinthium</italic> L., <italic>A. annua</italic> L., <italic>A. dracunculus</italic> L., <italic>A. marschalliana</italic> Spreng., <italic>A. vulgaris</italic> L., <italic>A. argyi</italic> H.Lév. &amp; Vaniot, and <italic>A. verlotiorum</italic> Lamotte. The vegetative organs of these plants have potentially significant value as medicinal raw materials. This study was carried out using both light and scanning electron microscopy. The main diagnostic characteristics for each species – in terms of form and structure of epidermal cells, stomata, and trichomes (glandular and non-glandular) – were described and illustrated. Using combinations of selected qualitative micromorphological characteristics of the investigated species of <italic>Artemisia,</italic> it is possible to detect the species identity of these raw materials.
</abstract>

Department of Pharmacognosy and Botany, Pharmaceutical Faculty

Department of Systematics and Floristics of Vascular Plants

Diagnostic micromorphological features of leaf surface of selected species of the genus <italic>Artemisia</italic> L. (Asteraceae)

<abstract xmlns="http://www.w3.org/1999/xhtml">

The vegetation developing on the coastal sand dunes and wetland of Schinias National Park, a Natura 2000 Site, was studied following the Braun-Blanquet method. Vegetation units were delimited using cluster analysis and by applying the fidelity measure; the phi-coefficient was used for the definition of diagnostic species. The vegetation types distinguished (twenty associations, two sub-associations and thirteen communities not assigned formal rank), which belong to 18 alliances, 16 orders and 12 classes, are discussed and presented in phytosociological tables. Among them <italic>Mathiolo tricuspidatae</italic>-<italic>Anthemidetum tomentosae</italic>, <italic>Pistacio lentisci-Pinetum halepensis pinetosum pineae</italic>, <italic>Puccinellio festuciformis</italic>-<italic>Aeluropetum litoralis cressetosum creticae</italic> and <italic>Tamaricetum tetrandrae</italic> are described for the first time. The vegetation types recognized in the study area are linked to twelve EUNIS habitat types, nine of which are related to 13 Annex I habitat types (Directive 92/43/EEC), and one to a habitat type of national interest (72A0). One Annex I habitat type occurring in the study area has scattered presence in the Natura 2000 network in Greece (1420), two are infrequent (2190, 2260), two are rare (2230, 2270) and three are priority habitat types (1150, 2250, 2270).
</abstract>

National and Kapodistrian University of Athens

National and Kapodistrian University of Athens, Panepistimiopolis

Vegetation of the coastal dunes and wetland of Schinias National Park (NE Attica, Sterea Ellas, Greece)

<abstract xmlns="http://www.w3.org/1999/xhtml">

The aim of this study was to estimate reproductive effort and success in tropical trees and to examine the effect of pollen limitation on reproductive success. Pollen limitation was assessed through pollen supplementation experiment to contrast the open pollination treatment. The taxa selected were <italic>Bombax ceiba, Erythrina stricta</italic> (ornithophilous trees), <italic>Lagerstroemia speciosa, Mesua ferrea</italic> and <italic>Schima wallichii</italic> (entomophilous trees). Index of pollen limitation was highest in <italic>Bombax ceiba</italic> and <italic>Erythrina stricta</italic> (both self-incompatible species). The remaining three species were partially self-incompatible with favouring selfing in <italic>Lagerstroemia speciosa</italic> and <italic>Mesua ferrea</italic> and supporting outcrossing in <italic>Schima wallichii</italic>. Therefore, the high index of pollen limitation in <italic>Bombax ceiba</italic> and <italic>Erythrina stricta</italic> might be due to the effect of either lacking quality pollen or lacking bird pollinators. All five species produce a large amount of pollen at individual tree level in the order of 108 (<italic>Erythrina stricta</italic>) to 1010 (<italic>Mesua ferrea</italic>). Fruit and seed set following pollen supplementation were higher than the open pollination (as control) in all studied species. Pollen limitation in this study is likely associated with the effectiveness of pollinator and their frequency, as all the studied species had produced ample pollen at tree crown level which ultimately leads to pollinator resource limitation in tropical trees.
</abstract>

Pollen limitation failing reproductive success in selected animal pollinated trees of tropical moist deciduous forest of north-eastern hill region, India

<abstract xmlns="http://www.w3.org/1999/xhtml">

The <italic>Euphorbia resinifera</italic> is melliferous and medicinal plant and one of the endemic species of Moroccan Atlas Mountains. It is very well known for its honey of high nutritional and therapeutic quality. The objective of our study is to characterize and evaluate the phenotypic variation of this spontaneous species. Seventeen qualitative and quantitative morphological characters related to the bush, stem, spine, flower, and fruit of the plant were used to assess the morphological variability of twelve natural populations collected from its geographical range in Morocco. The results of the analysis of variance showed significant differences between the studied populations for the most examined traits reflecting the existence of a high phenotypic variability within this species. The principal component analysis showed that <italic>E. resinifera</italic> populations were clustered in three distinct groups not related to mountain range type. The results highlight a high phenotypic diversity within studied populations of this species in Morocco. This work aims to study the phenotypic variability of <italic>E. resinifera</italic> to delineate conservation strategies and also to establish forms of rational economic exploitation.
</abstract>

Phenotypic diversity of natural populations of an endemic Moroccan plant (<italic>Euphorbia resinifera</italic> O. Berg)

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Hacquetia

 Hacquetia is a science journal bearing on Taxonomy, Floristics, Faunistic, Vegetation ecology, Biocoenology and Palynology. with a geographical focus on Southeastern Europe, although more general topics from all over the world are also invited. Why subscribe and read   Publication of quality research papers   Why submit   Fast, fair and constructive peer review (two or three competent reviewers),  Language corrections for non-native speakers,  Promotion of published works.   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 

Hacquetia

Volume 22 (2023): Issue 1 (June 2023)

Spiraea decumbens Koch subsp. tomentosa (Poech) Dostál, novelty for the flora of Slovenia and the Dinaric Alps

Post-harvesting late summer-autumn weed vegetation in small size arable fields in Veneto: new insights into root crop communities in North East Italy

Studies on the genus Atriplex (Chenopodiaceae) in Italy VII. Atriplex micrantha and A. oblongifolia

Carex × takhtadjanii (Carex diluta × C. distans; Cyperaceae), a new hybrid for the flora of Ukraine

Diagnostic micromorphological features of leaf surface of selected species of the genus Artemisia L. (Asteraceae)

Vegetation of the coastal dunes and wetland of Schinias National Park (NE Attica, Sterea Ellas, Greece)

Pollen limitation failing reproductive success in selected animal pollinated trees of tropical moist deciduous forest of north-eastern hill region, India

Phenotypic diversity of natural populations of an endemic Moroccan plant (Euphorbia resinifera O. Berg)

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