Pectocarya is a genus of small annual flowering plants in the family Boraginaceae (order Boraginales), commonly known as combseeds. The genus comprises approximately 13–15 accepted species, distributed primarily across western North America, with a few representatives reaching South America.
Plants in this genus are characterised by their diminutive stature and tiny white flowers, which measure no more than 3 millimetres in diameter. The most distinctive feature of combseeds is their fruit: small, dry nutlets that typically bear marginal projections resembling the teeth of a comb — the origin of the group's common name. These nutlets usually occur in clusters of four and are an important dispersal unit.
Notable members include Pectocarya recurvata (curvenut combseed), Pectocarya linearis (sagebrush combseed), and Pectocarya penicillata (sleeping or winged combseed). The genus belongs to the family Boraginaceae, a large family of flowering plants that also includes borage, forget-me-nots, and lungworts.
Etymology
The common name "combseeds" refers to the characteristic nutlets, which bear small marginal projections resembling the teeth of a comb. The genus name Pectocarya derives from the Greek pectos (combed or comb-like) and karyon (nut), reflecting the same morphological feature.
Distribution
Pectocarya species are found mainly in western North America, where they grow in arid and semi-arid habitats. A small number of species, such as Pectocarya boliviana, extend the range into South America.
