Hasnaa Hosni

• Ph.D
• Professor at Cairo University

Representatives of the Euphorbiaceae s.l. in the flora of Egypt are notoriously difficult to identify with any degree of certainty, especially when using the manually constructed keys currently available for them. Such keys are based largely on single characters separating alternative entries of the same couplet which may vary considerably in indiv...

Background: Endemism is essential in biodiversity, biogeography, and conservation tasks. Based on herbarium specimens kept in some local herbaria, many published literature, and available information, we compiled a comprehensive list and an updated assessment of the Egyptian endemic and near-endemic taxa. The application of quantitative approaches...

Tribulus terrestris L. is a cosmopolitan annual herb that grows under various ecological conditions, reflecting the variation in its morphological, chemical, and biological features. T. terrestris was collected from three different populations (I, II, III) in Egypt and subjected to comparative investigation to evaluate the morphological, metabolomi...

By using light microscopy (LM) and scanning electron microscopy (SEM), the pollen grains and foliar epidermal morphology of four species and two varieties of Egyptian Oxalis Linnaeus, 1753 belonging to three sections of the subgenus Oxalis Linnaeus, 1753 were studied. The objective was to determine the importance of pollen and foliar epidermal char...

The current study is the first attempt to provide a comprehensive inventory of all newly recorded vascular plant taxa which were collected from Egypt after Boulos' Checklist 2009. The study was compiled by gathering several information sources such as relevant taxonomic publications, accessible online database, herbaria collections and field observ...

Three medicinally promising Oxalis species, namely O. pes-caprae, O. corymbosa & O. latifolia were collected from Egyptian flora and their methanolic extracts were subjected to LC-QTOF-MS analysis to annotate their chemical profiles. Subsequently, 50 compounds belonging to various chemical classes were identified and characterized, of which 34 comp...

Updated nomenclatural treatment of the native and naturalized vascular flora of Egypt is presented. It was compiled by referring to several information sources such as existing literature, relevant online database, and herbaria collections. Recent molecular phylogenetics have resulted in the identification of new families. All families, genera, and...

This paper provides a full taxonomic revision of the genus Oxalis for the flora of Egypt. The study was carried out on herbarium specimens as well as fresh materials. The study revealed the presence of five species and one variety belonging to three sections by adding O. corymbosa and O. latifolia. Oxalis corniculata is a polymorphic taxon in Egypt...

The anatomical structure of seed coats of 13 Egyptian taxa belonging to three Fabaceae-Papilionoideae tribes, Sophoreae, Crotalarieae, and Genisteae, were investigated using light microscopy and scanning electron microscopy. Mature seeds show an anatomically complex structure, characteristic of members of Papilionoideae, composed of three main laye...

Five Oxalis L. plants belonging to three different sections were collected and subjected to GC-MS analysis to evaluate and understand the relationship between them from the chemosystematic point of view. The GC-MS analysis revealed the identification and characterization of thirty seven compounds belonging to different non-polar chemical classes of...

Papilionoideae is the most species-rich subfamily of Fabaceae. Within Papilionoideae, the “core genistoids” comprise many genera of the tribes Podalyrieae, Thermopsideae, Euchresteae, Crotalarieae, Genisteae, and part of Sophoreae. Seed macro- and micro-morphological characters and seed storage proteins of 12 Egyptian species belonging to three tri...

THIS STUDY aimed to characterize the external morphology of achenes of the 74 taxa belonging to 51 genera and four subfamilies of Asteraceae from the Northwestern Mediterranean coast of Egypt. By using light microscopy, 26 quantitative and qualitative morphological characters were recorded. Among the studied taxa, achene symmetry, hairiness, surfac...

A key for identifying 284 native and naturalized Egyptian grass species belonging to 103 genera in 22 tribes and 7 subfamilies is presented. The key is principally based on floral characters of the inflorescence and spikelet. A list and classification of all known species of Egyptian grasses is provided.

A key for identifying 284 native and naturalized Egyptian grass species belonging to 103 genera in 22 tribes and 7 subfamilies is presented. The key is principally based on floral characters of the inflorescence and spikelet. A list and classification of all known species of Egyptian grasses is provided.

Jebel Marra, a volcanic complex in western Sudan, is an important site of early settled agriculture, with high plant diversity, supported by orographic rainfall. Vegetation types were examined in relation to habitat, altitude, soils, and land management. In 52 sites, 274 species , predominantly Fabaceae and Poaceae, were recorded (with 17 new recor...

Background: The lives of the "Fur", indigenous people of Darfur, Sudan are intimately connected to local wild plants, but the traditional uses of these plants are, so far, poorly documented. Many species are indigenous to the region, but others are introduced, and have naturalized over millennia.

Egeria densa Planch. is reported for the first time for the aquatic flora of Egypt. This species is a South American aquatic plant species considered highly invasive outside of its original range. In Egypt, the species may have been introduced as an aquarium plant and has long been wrongly identified as Elodea canadensis. However, it was collected...

The present study aims to update the list of the alien species in the Egyptian flora, which prepared from literature reviewing, field trips and herbaria consultation. The recent list includes 250 taxa (11.7% of the Egyptian flora); including 5 subspecies and two varieties; related to 161 genera and 41 families. Three state of alien species are reco...

Rosa arabica is endemic to the high mountain area of the St. Catherine Protectorate, Southern Sinai, Egypt. It has been listed as Critically Endangered in the IUCN Red Plant List.The present study aimed to provide detailed morphological and anatomical characters of the endemic Rosa arabica by using light and scanning electron microscopy in order to...

The Caryophyllaceae are one of the most represented families among endemic species in Sinai Peninsula, Egypt. rbcl-based DNA barcoding sequences for three species of Caryophyllaceae endemic to Sinai Peninsula (Bufonia multiceps, Silene leucophylla and S. oreosinaica) are developed for the first time. BLASTN reflected 100% Caryophyllaceae hits for r...

The revision of genus Tribulus L. (Zygophyllaceae s.l.) in Arabia has revealed the presence of 13 species, 2 subspecies and 6 varieties belonging to 3 sections of which one species, 2 varieties are described new. Three species are believed to be endemic to Arabia: T.arabicus, T.omanense and T.incanus sp.nov. Three combinations of infraspecific taxa...

This study was designed to examine the subtle effects of habitat, aspect and altitude on plant diversity and the timing of phenological stages. In this increasingly arid region, within-species differences would cause more reproductive isolation of local populations, making species more vulnerable to regional extinction. Fifty-two sites in the Jebel...

A vegetative key, descriptions, and illustrations for the identification of 199 native and naturalized grasses that occur in Mali are presented. In addition, we provide a modern classification, glossary of terms, and indexes to scientific and common names. The key is based on vegetative characters to allow identification of specimens that do not ha...

Populations of Albizia amara, Acacia senegal, Anogeissus leiocarpus, and Balanites aegyptiaca were monitored in five habitats in the Jebel Marra region: clay plains, sand plains, wadis, northern slopes, and southern slopes of the Jebel Marra (mountain) region. The plains and wadi habitat types had been regularly disturbed because of cycles of shift...

A comparative study based on morphological and anatomical characters was made using light and scanning Electron Microscopy on widely distributed Hyoscyamus muticus in Egyptian flora and endemic Hyoscyamus boveanus growing in Sant Kathren, Sinai in order to find reliable diagnostic characters to separate these species. The results indicate considera...

Seven flavonoids were isolated for the first time from the defatted aqueous methanol extract of Dipcadi erythraeum Webb. & Berthel. They were identified as kaempferol (1), quercetin (2), quercetin 3-O-(6΄΄-α-rhamnopyranosyl)-β-glucopyranoside-7-O-α-rhamnopyranoside (3), vitexin (4), isovitexin (5), orientin (6) and isoorientin (7). Their structures...

The present study aims to assess the relation between the floristic composition and the different habitats charcterizing the western Mediterranean region of Egypt, determine the community types that dominate the study area; and evaluating the rarity of the recorded species. Nine hundred and sixty eight species (belonged to 429 genera and 97 family)...

•Ten flavonoid compounds were isolated from the whole plant of Allium myrianthum Boiss.•All compounds were first isolated from A. myrianthum Boiss.•The isolation of four compounds (7–10), belonging to a flavone nucleolus which had not been found in the genus Allium before.•Performance of a chemotaxonomic significance of A. myrianthum Boiss.

The first phytochemical investigation of Moraea sisyrinchium (L.) Ker Gawl. revealed the isolation and elucidation of seven flavonoids; apigenin, apigenin 7-O-β-glucopyranoside, luteolin 7-O-β-glucopyranoside, isovitexin, orientin, isoorientin and saponarin. Their structures were established on the basis of chemical and spectroscopic analysis and b...

The aim of this paper is to provide baseline information on endemism in Egypt. A total of 191 endemic and near-endemic taxa are recorded from Egypt and one or more neighboring countries. Seventy six taxa are believed to be endemic to Egypt of these twenty one are steno-endemic. About 31.6% of endemics are found in the Mountainous Southern Sinai sub...

Abstract: The aim of this paper is to provide baseline information on endemism in Egypt. A total of 191 endemic and near-endemic taxa are recorded from Egypt and one or more neighboring countries. Seventy six taxa are believed to be endemic to Egypt of these twenty one are steno-endemic. About 31.6% of endemics are found in the Mountainous Southern...

A systematic revision of the Egyptian species of the family Primulaceae was carried out. It reveals the presence of the following taxa: Primula boveana L., Asterolinon linum-stellatum (L.) DUBY, Anagalis arvensis L. var. arvensis, A. arvensis L. var. caerulea (L.) GOUAN, A. arvensis L. var. latifolia (L.) LANGE, Samolus valerandi L. and Coris monsp...

This paper describes the treatment and conservation of anEgyptian wooden coffin box dating back to ca. 1st century. Thetreatment procedures entailed cleaning, removal of dust andsand, securing severely damaged wooden fragments and damagedresin as well as the use of a suitable gap filler. Studiesincluded wood and microbiological identification.

Analysis of vegetation along an altitudinal gradient in south-west Saudi Arabia has disclosed some generalities in vegetation characters and species diversity. The complex interaction of different environmental factors in relation to altitude leads to variation of habitat types and different plant communities and vegetational belts. Vegetation alon...

The weed flora associated with field crops and orchards in Dakahleya Province, NE Nile Delta, were classified using TWINSPAN technique into nine weed groups dominated by nine weed species. These groups comprised 73 weed species related to 27 families. These species included 56 annuals (75.7%) and 18 perennials (24.3%). The recorded species were for...

The flora of Egypt consists of about 2,080 species of seed plants and vascular cryptogams. Of the 1083 species from the Mediterranean coasts, 255 species (incl. 18 endemics) are only known from this area. The Nile-land and the oases contain a total of 800 species; 134 of these species (incl. 10 endemics) are only known from this territory. Of the 1...

Thirty-six species belonging to 27 genera of the sub-family Apioideae, family Umbelliferae, were investigated for their leaf and stem flavonoids. Fourteen flavonoid glycosides of the aglycones kaempferol, quercetin, isorhamnetin, apigenin and luteolin were identified. Chemosystematic relationships are discussed.