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Plant - Vascular, Photosynthesis, Reproduction: Vascular plants (tracheophytes) possess supporting and water-conducting tissue called xylem and food-conducting tissue called phloem; they also have true stems, leaves, and roots. Lycophytes (class Lycopodiopsida) are nonseed plants represented by three living orders, the principal genera being club mosses, spike mosses, and quillworts.
Wildlife of Australia. The flora of Australia comprises a vast assemblage of plant species estimated to over 21,000 vascular and 14,000 non-vascular plants, 250,000 species of fungi and over 3,000 lichens. The flora has strong affinities with the flora of Gondwana, and below the family level has a highly endemic angiosperm flora whose diversity ...
Herbaceous plant. Lysimachia latifolia (broadleaf starflower) is a perennial herbaceous plant of the ground layer of forests in western North America. Herbaceous plants are vascular plants that have no persistent woody stems above ground. [1] [2] This broad category of plants includes many perennials, and nearly all annuals and biennials.
Antarctic flora are a distinct community of vascular plants which evolved millions of years ago on the supercontinent of Gondwana. Presently, species of Antarctica flora reside on several now separated areas of the Southern Hemisphere , including southern South America , southernmost Africa , New Zealand , Australia , and New Caledonia .
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 ...
Evolutionary history of plants. A late Silurian sporangium, artificially colored. Green: A spore tetrad. Blue: A spore bearing a trilete mark – the Y -shaped scar. The spores are about 30–35 μm across. The evolution of plants has resulted in a wide range of complexity, from the earliest algal mats of unicellular archaeplastids evolved ...
La World Checklist of Vascular Plants ( WCVP, en français littéralement la « Liste mondiale des plantes vasculaires ») est une base de données en ligne de taxonomie végétale. Il s'agit d'un consensus mondial sur toutes les espèces de plantes vasculaires connues, comprenant les plantes à fleurs, les conifères, les fougères et les ...
