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7 lip 2024 · Eight Euphorbiaceous species were examined for petiole micromorphological characteristics including shape and size of the petiole, collenchyma cells, parenchyma cells, epidermal cells, and number and shape and arrangements of vascular bundles.
29 mar 2019 · The paper presents a study concerning the leaf structure (petiole, as the case) and blade of two Euphorbia species belonging to Euphorbiaceae family: Euphorbia trigona Mill., and E. tirucallli L.
The petiole of Euphorbia trigona possesses one epidermis cells which are more or less rounded in shape, covered by a thin cuticle. The vascular system of the petiole is represented by three closed-collateral vascular bundles.
Euphorbia tirucalli L. (pencil plant, milky shrub, pencil cake) is a perennial plant native from Africa where it was very widespread. Currently, it can also be found spontaneously, in restricted areas, in the center, southern and northeast of the African continent.
Euphorbia hirta grows as erect or sprawling herb covered in articulate hairs, to 0.5 m in height (typically shorter). The leaves are arranged oppositely, ovate to elliptical lanceolate, to 5 cm in length with an acute leaf apex, serrate along the upper leaf margin and oblique leaf base.
Euphorbia heterophylla grows as a slightly pubescent, annual herb up to 1 m in height. The leaves are arranged oppositely, up to 12 cm in length, ovate, with an entire or toothed leaf margin and an obtuse leaf apex. At the base of the petiole are short lived stipules.
Family Euphorbiaceae. Synonyms: Bischofiaceae APNI* Description: Herbs, shrubs, trees or rarely climbers, monoecious or dioecious; milky latex often present. Leaves mostly alternate, sometimes 2-ranked, usually simple, rarely reduced to scales; stipules mostly present, often small.
