Gamochaeta stagnalis

Gamochaeta stagnalis, the Desert cudweed, is a species of flowering plant in the sunflower family. It is native to Mexico, Guatemala, and the southwestern United States (California, Arizona, New Mexico).[3][4][5]

Gamochaeta stagnalis
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Gnaphalieae
Genus:	Gamochaeta
Species:	G. stagnalis
Binomial name
Gamochaeta stagnalis (I.M.Johnst.) Anderb. 1991
Synonyms[1][2]
Synonymy Gnaphalium stagnale I.M. Johnst. 1923 Gamochaeta stagnale Anderb. Gamochaeta falcata (Lam.) Cabrera Gnaphalium falcatum Lam. Gnaphalium heteroides Klatt Gnaphalium purpureum var. falcatum (Lam.) Torr. & A.Gray Gnaphalium stachydifolium var. falcatum (Lam.) Klatt

Gamochaeta stagnalis is an annual herb up to 35 cm (14 in) tall, producing a slender taproot. Leaves are up to 3 cm (1.2 in) long. The plant forms many small flower heads in tightly packed clumps. Each head contains 3–4 purple disc flowers but no ray flowers.[3][6]

Gamochaeta stagnalis is very similar to G. purpureum and some G. stagnalis specimens (especially from Arizona) have been misidentified as that species.[3]

References

1. Tropicos, Gamochaeta stagnalis (I.M. Johnst.) Anderb.
2. The Plant List, Gamochaeta stagnalis (I.M.Johnst.) Anderb.
3. Guy L. Nesom 2004. New distribution records for Gamochaeta (Asteraceae: Gnaphalieae) in the United States. Sida 21(2): 1175–1185.
4. Biota of North America Program 2014 county distribution map
5. Calflora taxon report, University of California, Gamochaeta stagnalis (I.M. Johnst.) Anderb.
6. Flora of North America, Gamochaeta stagnalis (I. M. Johnston) Anderberg, 1991. Desert cudweed