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Said of certain varieties of plants developed because of some desirablecharacteristic. They are not necessarily hybrids, but usually are arti- ficially hybridized, then propagated by grafts, buds, cuttings, etc.,to preserve in the new plant the desirable characteristics of the parent,which might be lost if grown from seed. A living plant attacked by a parasitic fungus or supporting a parasiticplant. A bed of earth enclosed in a glass-covered frame and heated by meansof fermenting manure placed well below the surface of the soil in thehotbed.Humus: A cross between two species of the same genus or two varieties of thesame species. |
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