''Guilleminea'' is a small genus of plants in the family

Amaranthaceae Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus ''Amaranthus''. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it ...

. They are sometimes known as matweeds. These are prostrate, mat-forming perennial herbs growing from

taproot A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. In some plants, such as the carrot, the taproo ...

s. The best known species is perhaps '' Guilleminea densa'', the small matweed, which is present on most continents and is often a

weed A weed is a plant considered undesirable in a particular situation, "a plant in the wrong place", or a plant growing where it is not wanted.Harlan, J. R., & deWet, J. M. (1965). Some thoughts about weeds. ''Economic botany'', ''19''(1), 16-24. ...

. The other species are native to the Americas. The genus was named after the French botanist

Jean Baptiste Antoine Guillemin Jean Baptiste Antoine Guillemin (20 January 1796 in Pouilly-sur-Saône – 15 January 1842 in Montpellier) was a French botanist. He studied at the municipal college in Seurre, where he was considered one of the most distinguished pupils. U ...

Species

The genus contains eight species including: *'' Guilleminea brittonii'' Standl., 1967 *'' Guilleminea chacoensis'' Pedersen, 2000 *'' Guilleminea densa'' (Willd.) Moq., 1849 - Small *'' Guilleminea elongata'' Mears, 1967 *'' Guilleminea fragilis'' Pedersen, 2000 *'' Guilleminea gracilis'' R.E.Fr, 1905 *'' Guilleminea hirsuta'' Pedersen, 2000 *'' Guilleminea lanuginosa'' (Poir.) Hook.f, 1880

References

External links

Jepson Manual TreatmentUSDA Plants Profile: North American Species
Amaranthaceae Amaranthaceae genera {{Amaranthaceae-stub