Flower image retrieval is a very important step for computer-aided plant species recognition. In this paper, we propose an efficient segmentation method based on color clustering and domain knowledge to extract flower regions from flower images. For flower retrieval, we use the color histogram of a flower region to characterize the color features of flower and two shape-based features sets, Cen...

abstract in order to identify the fruit flies of the genus tephritis laterille, 1804 (diptera: tephritidae) in ajabshir region- east azarbaijan province, a faunistic study was conducted during 2009-2010. in total, seven species were identified which all of them are as new records for the studying area and one species marked with an asterisk is being newly reported for iran insect fauna: tephrit...

Flower color variation among plant populations might reflect adaptation to local conditions such as the interacting animal community. In the northwest Iberian Peninsula, flower color of Gentiana lutea varies longitudinally among populations, ranging from orange to yellow. We explored whether flower color is locally adapted and the role of pollinators and seed predators as agents of selection by...

The tendency for flower longevity to increase with altitude is believed by many alpine ecologists to play an important role in compensating for low pollination rates at high altitudes due to cold and variable weather conditions. However, current studies documenting an altitudinal increase in flower longevity in the alpine habitat derive principally from studies on open-pollinated flowers where ...

Purpose: To evaluate the phytochemical profile as well as in vitro antioxidant, iron-chelating, and antiglucosidase activities of Typha domingensis Pers. (Typhaceae) Methods: Total polyphenols, flavonoids, hydroxycinnamic acids, and pro-anthocyanidins in the respective aqueous extracts of male and female flowers, and fruit of T. domingensis were determined by established procedures. Antioxidant...

Currently, the Neotropical genus Lepidiella Enderlein, 1937 comprises ten species, only one of them recorded from Brazil. In this paper, two new species of this genus are described from the Atlantic Rainforest of the state of Espírito Santo, Brazil. Lepidiella robusta sp. nov. can be distinguished from all known species by the relative size of the first flagellomere, twice as long the second. L...

A list of world species for subgenera of Philosepedon Eaton, including Philosepedon s. str., Trichosepedon Krek, and Philothreticus Krek is given, and the subgenus Bahisepedon subgen. nov. is proposed to include some western hemisphere species. Philosepedon wagneri nom. nov. is proposed to replace P. orientale Wagner, a homonym of P. orientale Krek. Two new species from Europe, Philosepedon dum...