Orobanche hederae. Ivy broomrape.

Life-form & Growth Form:

Primary life-form an herbaceous perennial, non-bulbous geophyte; secondary life-form an annual therophyte. Little/no vegetative spread. 

Flowering period: 

May to September.

Habitats: 

A parasite on roots of Hedera helix. Calcareous cliffs and walls in areas of mild climate and usually free from frost.  

Threats:

Habitat loss and fragmentation through deforestation, especially long-established woodlands. Excessive clearance of Ivy from undercanopy of woodland, from sea cliffs or from old masonry.  

Static distribution map:
Orobanche hederae
Orobanche hederae
For an interactive map follow this link to the BSBI webpage