Vegetative key to the families

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ROOTLESS EPIPHYTIC PARASITES.
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Stems thread-like, leafless or almost so, forming tangled masses over the host and attached to the host by haustoria
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Stems yellowish or reddish. Usually parasitic on herbs Convolvulaceae
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Stems green or with brown scale-leaves. Usually parasitic on shrubs or trees (Cassytha) Lauraceae