Pityopus is a monotypic genus of flowering plants in the family Ericaceae, containing the single species Pityopus californicus, commonly known as pinefoot.[1]
Distribution and habitat
The plant is native to the western United States, occurring from Washington south through Oregon to the San Francisco Bay Area in California, generally below 1,800 meters (5,900 ft) in elevation.[1] It is considered uncommon throughout much of its range.
Pityopus californicus grows in coniferous and mixed forest habitats, including California mixed evergreen forest, yellow pine forest, red fir forest, and coastal coniferous forest.[2]
Description
Pityopus californicus is a perennial herb and a mycoheterotroph, obtaining nutrients by parasitizing fungi rather than through photosynthesis. It lacks chlorophyll and is cream to white in color.[1] It is among the smallest mycoheterotrophic plants in the heath family.[3]
The plant produces a fleshy, leafless peduncle emerging from the forest floor, reaching up to 10 cm in height. The stem is covered with reduced, scale-like leaves.
The above-ground portion consists primarily of an inflorescence bearing 2 to 11 cylindrical white flowers. Each flower has four or five petals and a hairy throat. Flowering occurs from May to July.[1]
The fruit is a small berry less than 1 cm wide containing numerous seeds. Mature plants emit a scent resembling Brie cheese, which may help attract pollinators.[4] After fruiting, the above-ground portion withers until the next growing season.
Taxonomy
Pityopus was described by John Kunkel Small and is considered a monotypic genus within the subfamily Monotropoideae of the family Ericaceae.[1]
The species has been treated under both spellings Pityopus californicus and Pityopus californica in the literature.[5]
Conservation
Pityopus californicus has a global conservation status of G4–G5 (apparently secure to secure) according to NatureServe.[5] It is generally secure across much of its range, though it is considered critically imperiled (S1) in Washington.[5]
References
- ^ a b c d e Jepson eFlora (TJM2): Pityopus californicus
- ^ Calflora: Pityopus californicus
- ^ Mycotrophic wildflowers: What are they?
- ^ Mycotrophic wildflowers: Pityopus californica
- ^ a b c “Pityopus californica”. NatureServe Explorer. Retrieved 23 March 2026.