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A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] ... Cross-section of a leaf. Epidermal cells. Spongy mesophyll cells. Epidermis
The stem anatomy of ferns is more complicated than that of dicots because fern stems often have one or more leaf gaps in cross section. A leaf gap is where the vascular tissue branches off to a frond. In cross section, the vascular tissue does not form a complete cylinder where a leaf gap occurs.
F bicollateral open Cross section of celery stalk, showing vascular bundles, which includes both phloem and xylem Detail of vascular bundle: closed, collateral vascular bundles of the stem axis of Zea mays Vascular bundle in the leaf of Metasequoia glyptostroboides The vascular bundle of pine leaf showing xylem and phloem
Cross section of a maize leaf, a C 4 plant. Kranz anatomy (rings of cells) shown Kranz anatomy (rings of cells) shown C 4 plants often possess a characteristic leaf anatomy called kranz anatomy , from the German word for wreath .
P. strictum leaf cross section, showing lamellae, costa, and inrolled leaf margin. Polytrichum strictum is considered an important pioneer species in peatlands, able to tolerate a wide range of environmental conditions and disturbance regimes. [6]
Cross section of celery stalk, showing vascular bundles, which include both phloem and xylem Detail of the vasculature of a bramble leaf Translocation in vascular plants. Vascular tissue is a complex conducting tissue, formed of more than one cell type, found in vascular plants. The primary components of vascular tissue are the xylem and phloem ...
Chart illustrating leaf morphology terms. The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets). [1]
Cross section of collenchyma cells Collenchyma tissue is composed of elongated cells with irregularly thickened walls . They provide structural support, particularly in growing shoots and leaves (as seen, for example, the resilient strands in stalks of celery ).