Browsing by Author "Sakhraoui, N"

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    Floral morphology of Oxalis debilis Kunth, 1822 (Oxalidaceae) naturalized in Algeria
    (2023-05-30) Sakhraoui, N; Essl, F; Chefrour, A.
    This study provides a description of the floral morphology of populations of Oxalis debilis Kunth, 1822 from Algeria. Three floral forms were found: semi-homostylous (dominant), mid-styled (frequent) and short-styled (extremely rare). Two anther colors (yellow and white) were recorded with the dominance of the latter. A few fruits with seeds were observed. We conclude that populations of O. debilis in Algeria are polymorphic with low sexual reproduction success. The species was accidentally introduced into different parts of the country with growing substrates contaminated by bulbs, bulbils and probably also by seeds
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    La flore endémique du Nord-Est algérien face à la menace des espèces envahissantes
    (2020-07-17) Sakhraoui, N; Boussouak, R; Metallaoui, S; Chefrour, A; Hadef, A.
    The endemic flora of Northeastern Algeria facing the threat of invasive plants. We established for the first time for the Skikda region, the lists (updated list and list of taxa to research) of endemic flora and naturalized species considered invasive in the Mediterranean, representing a potential threat to this flora, by conducting surveys at the level of twelve communes. This led to the identification of 64 endemic taxa more than half of which are in the updated list (38 taxa). These plants belong to 26 families, 46 genera and are divided into 50 species, 11 subspecies and 3 varieties. The Algerian-Tunisian endemics are the most abundant (30 taxa). 11 invasive species in the Mediterranean are naturalized in our region, 5 of which colonize natural environments particularly rich in endemic species. Acacia saligna, Carpobrotus edulis and Opuntia ficus-indica are the main threatening species of this biological richness
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    Naturalisation de Melia azedarach (Meliaceae) et premier signalement de Canna indica(Cannaceae) et Pelargonium zonale(Geraniaceae) en Algérie
    (2019-12-03) Sakhraoui, N; Chefrour, A; S. Metallaoui; Metallaoui, S.
    this contribution, we report the naturalization of Melia azedarach and the discovery ofCanna indica and Pelargonium zonale growing outside the usual cultivation sites, making thiswork the first report of these species in Algeria. Some species must be monitored because theyare invasive in the Mediterranean area.Key words: alien flora, xenophytes, mode of reproduction, invasive character, Algeria
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    Premier signalement d’Heliotropium amplexicaule Vahl. (Boraginaceae) dans le Nord–Est algérien
    (2021-12-08) Sakhraoui, N; Rouidi, S; Chefrour,A.
    New stations of Heliotropium amplexicaule Vahl. were discovered in northeastern Algeria, specifically within Skikda region. This discovery widens the range of this taxon towards the east of the country