New records of Ipomoea species (Convolvulaceae) for the flora of Egypt (original) (raw)
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THE BIOLOGY OF EGYPTIAN WOODY PERENNIALS 2. IPOMOEA CARNEA JACQ
Ipomoea carnea, a native of South America, grows in dense populations along river beds, banks, canals and other waterlogged (wetland) areas. It has become a naturalized species that invades the canal and drain banks, road sides and field edges in the Nile Delta. This plant propagates vegetatively either by stems which are capable of rooting within a few days or sexually by seeds. The farmers use it as ornamental and hedge plant along the field edges, drain and canal banks. These ornamental uses and reproduction by seeds have aided the plant to disseminate into new regions, especially in terrestrial habitats. ]It could be cause obstruction and difficulties in the proper use for cultivated lands and water courses in the Nile Delta[. The rapid growth rate, spread, and adaptability from aquatic to xerophytic habitats indicate that this plant may potentially become another ecological disaster like water hyacinth.
A New Record to the Flora of Saudi Arabia: Ipomoea carneaJacq., Convolvulaceae
Ipomoea carneaJacq.(Family Convolvulaceae) form Jazan, Saudi Arabia is described as a new record species to the flora of Saudi Arabia. The farmers use it as ornamental and hedge plant along the edge of their farm. The rapid growth rate, spread, and adaptability from aquatic to xerophytic habitats indicate that this plant may potentially become an invasive species in the next decade in that area and may cause other ecological disaster. Besides causing problems as a pasture weed, I. carneais reported to be a toxic plant.
Conventional keys for Convolvulaceae in the flora of Egypt
Flora Mediterranea, 2012
online. Three keys to 44 species belonging to the family Convolvulaceae in the flora of Egypt are prepared to facilitate the identification of those species, based on 72 characters. These keys were constructed using the DELTA key-generating programs. The first key was built using all characters and the second key was built using 56 characters (vegetative, floral and fruit characters). The first key is considered as main key and can be confirmed by the second key in the field. The third one was built using 16 characters (pollen grains, seed and cell wall characters) which are to be used to identify and confirm the specimen in the laboratory.
Notulae Scientia Biologicae, 2013
Foliar micromorphological study was carried out on I. triloba, I. eriocarpa, I. alba, I. hederifolia, I. muricata, I. intrapilosa, I. asarifolia, I. batatas, I. aquatica, I. mauritiana, I. carnea, I.involucrata, I. nil, I. heterotricha and I. obscura to determine the patterns of variation in their epidermal characteristics and search for useful and stable anatomical characters for the identification of the species. Leaf epidermal features that provided useful specific distinctions are cell shape, anticlinal wall pattern, stomata shape, stomata type, trichome, cuticular striations, crystal, granular periclinal wall, stomata size, stomata index, scale and tannin. The characters revealed interrelationships among the Ipomoea species and also suggest their monophyly.
Floral morphovariations Ipomoea
“Studies on Floral Morphovaritions of Genus Ipomoea L. From Nasik, Maharashtra.”, 2020
The present research article deals with the study on floral morphovariations of genus Ipomoea L.; a dominant genus belonging to family Convolvulaceae. The detailed survey and frequent field visits were conducted during the period from January 2019 to February 2020. Total 10 species have been collected and studied from various localities like swampy forest area, road side, village, water bodies, and boundaries of agricultural fields across the Nasik region. The recorded species were listed and photographically illustrated to distinguish key characters. The habit, size, shape, pattern and color of corolla well as corresponding lengths of stamens, carpels and their projection have been demonstrated so as to delimit the taxa through primary identification. The species like I.cairica, I. carnea, I. triloba and I. companulata have been found to be distributed more commonly and quite invasive having persistent growth; showed intraspecific variation, complexity in terms of floral attributes, flowering period, anthesis etc.
Ipomoea triloba L. (Convolvulaceae): a new record for the flora of Assam, India
Pleione 11(1): 159 - 162. , 2017
Ipomoea triloba L. belonging to Convolvulaceae has been recorded for the first time from the Kamrup district (Metro) of Assam and is reported here as a new record for the State. Detailed description, phenology and ecology of the taxon have been provided along with photographs for its easy identification in the field.
In Nile Delta of Egypt, the introduced invasive species Ipomoea carnea Jacq. occupies pure and/or mixed stands with poor associates along the banks of canals and drains forming a dense above ground patches. In this study, the impact of I. carnea on floristic diversity and soil chemical properties evaluated. The plant community attributes including species richness and evenness were compared between invaded and uninvaded stands. The allelopathic potential of the aqueous extracts of root, stem, leaf and fruit of I. carnea were examined on seed germination and seedling growth of Echinochloa crus-galli and Portulaca oleracea. Results showed that, the inhibitory effect of I. carnea extracts could be related to the presence of phenolics, flavonoids, tannins and alkaloids, and followed a gradient: leaf> fruit> root> stem. The allelopathic activity of I. carnea coupled with its competitive effect for soil nutrients could contribute to the invasion success and attainment of pure population. Furthermore, the aqueous leaf extract could be applied at a concentration of 10 gl-1 as a natural potent bioherbicide for management of Echinochloa crus-galli and Portulaca oleracea weeds.