Phyllodoce is a genus of polychaete worms, which contains about 200 species.
 The prostomium bears eyes, two pairs of antennae and a pair of large retractile nuchal organs.
 The eversible proboscis is clearly divided into two parts.
Cistus (from the Greek "kistos") is a genus of flowering plants in the rockrose family Cistaceae, containing about 20 species (Ellul "et al." 2002).
 They are perennial shrubs found on dry or rocky soils throughout the Mediterranean region, from Morocco and Portugal through to the Middle East, and also on the Canary Islands.
Cytinus is a genus of parasitic flowering plants. Species in this genus do not produce chlorophyll, but rely fully on its host plant.
 "Cytinus" usually parasitizes "Cistus" and "Halimium", two genera of plants in the Cistaceae family.
 It has also been found on "Ptilostemon chamaepeuce".
Phyllodoce is a small genus of plants in the heather family, Ericaceae.
 They are known commonly as mountainheaths, mountain heaths, or mountain heathers.
 They are native to North America and Eurasia, where they have a circumboreal distribution.
Pulchroboletus is a fungal genus in the family Boletaceae.
 It was circumscribed in 2014 to contain the species formerly known as "Xerocomus roseoalbidus", a rare bolete fungus originally described from Sardinia, Italy.
 Pulchroboletus roseoalbidus is found in Mediterranean Europe, where it grows in association with oak species and less often "Cistus" species.
Alessioporus is a fungal genus in the family Boletaceae.
 It was circumscribed in 2014 to contain the species formerly known as "Xerocomus ichnusanus".
 Alessioporus ichnusanus is found in southern Europe, where it grows in association with oak species and less often "Cistus" species.
 It grows even less frequently with "Castanea sativa" and possibly with "Eucalyptus camaldulensis" and "Pteridium aquilinum".
Halimium (rockrose, false sun-rose, or halimium) is a genus of 12 species of evergreen or semi-evergreen subshrubs in the family Cistaceae, closely related to "Cistus".
 They are native to Europe, North Africa and Asia Minor, with the centre of diversity in the western Mediterranean region.
Penicillium aureocephalum is a fungus species of the genus of "Penicillium" which was isolated in Catalonia in Spain on leaves from Quercus suber and Cistus salviifolius.

Question: Cistus and Phyllodoce, are a genus of what?
Answer: plants