perennial

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Related to perennial urochloa grass: Brachiaria mutica

perennial

a plant that lives from year to year in a form other than seed. Plants with woody stems are generally perennials (e.g. trees, shrubs and woody vines), but so too are many herbaceous plants (e.g. dandelion, daisy and plantain), in which the aerial parts die back during the winter leaving perennating organs (e.g. tubers, corms and bulbs) underground.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Perennial

Present at all seasons of the year.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.