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Having leaf tissue taper down the petiole to a narrow base and always having some leaf material on each side of the petiole auriculate: auriculatus: leaf base: Having ear-shaped appendages reaching beyond the attachment to the petiole or stem (in case of a seated leaf) caudate: caudatus: leaf tip: Tailed at the apex cirrus, cirrate: leaf tip
A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [2][3] while the leaves, stem, flower, and fruit collectively form the shoot system. [4]
Casparian strip. The Casparian strip is a band-like thickening in the center of the root endodermis (radial and tangential walls of endodermal cells) of vascular plants (Pteridophytes [ 1 ] and Spermatophytes). The composition of the region is mainly suberin, lignin and some structural proteins, which are capable of reducing the diffusive ...
Longitudinal section of carpellate flower of squash showing ovary, ovules, stigma, style, and petals. In flowering plants, the ovule (from Latin ovulum meaning small egg) is a complex structure born inside ovaries. The ovule initially consists of a stalked, integumented megasporangium (also called the nucellus).
By inserting a piece of mica he could block transmission in the illuminated and non-illuminated side of the tip, respectively, which allowed him to show that the transmission took place in the shaded part of the tip. Thus, the longitudinal half of the coleoptile that exhibits the greater rate of elongation during the phototropic curvature, was ...
In botany, a cortex is an outer layer of a stem or root in a vascular plant, lying below the epidermis but outside of the vascular bundles. [1] The cortex is composed mostly of large thin-walled parenchyma cells of the ground tissue system and shows little to no structural differentiation. [2] The outer cortical cells often acquire irregularly ...
The tip of the root is protected by a root cap that is continuously sloughed off and replaced because it gets damaged as it pushes through the soil. Cellular division via mitosis takes place at the very tip of the root cap. The newly created cells then begin a stretching process of cellular elongation, thereby adding length to the root.
Stele (biology) In a vascular plant, the stele is the central part of the root or stem [1] containing the tissues derived from the procambium. These include vascular tissue, in some cases ground tissue (pith) and a pericycle, which, if present, defines the outermost boundary of the stele. Outside the stele lies the endodermis, which is the ...