Participant Info

Species

Matricaria discoidea [Matricaria matricarioides]

Family

Asteraceae

CommonName

pineapple weed

Presence

YES

Status

exotic

EarliestDate

1986

LatestDate

2021

Ecosystem

basin, montane, ruderal

Geobotanical

Garitas, SSanjuans, LBasin

Counties

Costilla, Rio Grande, Saguache

Passes

WildlifePreserves

Other Localities

PhotoRecords

YES Rich Haswell, Saguache Co, FR740 one mile S of HWY 14, 26 Aug 2021; Mary E. McDonald: Conejos Co, 2 Oct 2018

Comments

Of pineapple weed, the Watershed has only four records: along a road 5 miles W of San Luis (Costlla Co, 1986); by Park Creek Road (Forest Road 380) S of South Fork (Rio Grande Co, 2003); Wolf Creek pass (4 Sept 2015, Mineral Co); roadside SE of Luders Creek campground (Saguache Co, 2021). The last two, photorecord,s would add Mineral and Saguache to counties indicated in Ackerfield (2022). It is perhaps surprising that there have not been more observations of a flower that is common farther north in the central mountains of Colorado. It is also common in all states of the USA except for Texas, Florida, and the Deep South. Its presence in the Rio Grande drainage stops at Rio Arriba, Taos, and Sandoval counties of New Mexico.

Annotation