seed

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Punctuating this radiant waste was the durable mesquite, a squat pretender to treeness, which grazing animals had brought up from Mexico (for the lucky-duck :mesquite seed passes through the digestive tract of, say, a longhorn not only unharmed but with its seedcoat strategically scarified by gastric juices; thus upon its evacuation from a beast it is fertilized, watered and in all ways at home).
Forest Service, the following two preplanting treatments for mimosa seeds are given: Scarify (scar the seedcoat with a file), then soak seed in sulfuric acid for 15 minutes - be careful, this stuff burns
It consists of a polymeric substrate with a thin metal tiecoat, copper seedcoat and a layer of electrodeposited copper on both sides.