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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Caryophyllales

Familia: Amaranthaceae s.l.
Cladus: Amaranthaceae s.str.
Subfamilia: Gomphrenoideae
Genus: Guilleminea
Species: G. chacoensis – G. densa – G. elongata – G. fragilis – G. gracilis – G. hirsuta

Guilleminea Kunth, Nov. Gen. Sp. [H.B.K.] 6: 33 (ed. fol.); 40 (ed. qu.). 1823

Type: Guilleminea illecebroides Kunth. = Guilleminea densa (Humb. & Bonpl. ex Schult.) Moq.


Brayulinea Small, Fl. S.E. U.S. [Small]. 394, 1330. (1903)
Type: Brayulinea densa (Humb. & Bonpl. ex Schult.) Small
named for William L. Bray and Edwin Burton Uline

Primary references

Humboldt, A., Bonpland, A. & Kunth, C.S. 1823–1824 ["1823"]. Nova genera et species plantarum, quas in peregrinatione ad plagam aequinoctialem orbis novi collegerunt, descripserunt, partim adumbraverunt Amat. Bonpland et Alex. de Humboldt. Tomus 6 (quarto ed.). 600 pp. Apud Gide filium, Lutetiae Parisiorum [Paris]. BHL Reference page. : 40, pl. 518
Small, J.K. 1903. Flora of the Southeastern United States, being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolina, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana and the Indian territory and in Oklahoma and Texas east of the one-hundredth meridian. 1370 pp. Published by the author, New York. BHL Reference page. : 394, 1330


Govaerts, R. et al. 2019. Guilleminea in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2019 Sept. 27. Reference page.
Hassler, M. 2019. Guilleminea. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2019. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2019 Sept. 27. Reference page.
International Plant Names Index. 2019. Guilleminea. Published online. Accessed: Sept. 27 2019. 2019. Guilleminea. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Sept. 27.

Vernacular names
English: Matweeds

Guilleminea is a small genus of plants in the family Amaranthaceae. They are sometimes known as matweeds. These are prostrate, mat-forming perennial herbs growing from taproots. The best known species is perhaps Guilleminea densa, the small matweed, which is present on most continents and is often a weed. The other species are native to the Americas. The genus was named after the French botanist Jean Baptiste Antoine Guillemin.

The genus contains eight species including:[1]

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


"Guilleminea". The Plant List, retrieved 17 June 2020.

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