...however, there are also plants without chlorophyll, which obtain energy by parasitizing other plants (parasites) or from organic matter present in the soil (saprophytes): since they lack chlorophyll, they are usually of a yellowish, whitish or brownish colour:
Among them there are all species of the genus Cuscuta
, wich have no roots and thread-like stems devoid of leaves...
...and those of the genus Orobanche
, which parasitize the roots of other plants:
Devoid of chlorophyll are also the fertile (sporiferous) stems of some species of horsetail (Equisetum
), which appear in early spring and are soon followed by sterile green stems: