Endogen 2247798 171790922 2007-11-16T01:02:34Z MPF 38759 link corrected An '''Endogen''' is a [[plant]] that increases in size through internal growth and elongation. They do not form annual layers, and have no obvious [[pith]]. Their [[leaf|leaves]] usually have parallel [[vein]]s, and the [[flower]]s come in multiples of three. Endogens make up one of the primary classes of plants. ==See also== * [[Exogen]] {{botany-stub}}