Morphology

Sometimes small, but macroscopic plants.  All form stems, flowers and seed, but all lack roots; May or may not form leaves (chlorophyll). 

Reproduction

Flowers and seeds; conductive system of the parasite penetrates and connects to the vascular system of the host. 

Sites of pathogen survival

Seed of parasitic plant may be present in soil or mixed with seed of host plant.   Perennial host plants infected by parasitic plants.

Symptoms caused

Brooms and stunting.

Signs of caused

Stems, leaves, flowers and seeds of parasitic plant.