Single Record
Participant Info
- Species
- Pilosella aurantiaca [Hieracium aurantiacum]
- Family
- Asteraceae
- CommonName
- orange hawkweed
- Presence
- YES
- Status
- exotic, noxious
- EarliestDate
- 2003
- LatestDate
- 2023
- Ecosystem
- montane
- Geobotanical
- SSanjuans
- Counties
- Conejos, Rio Grande
- Passes
- WildlifePreserves
- Other Localities
- Comments
- From the Watershed, there is only one voucher of orange hawkweed: Park Creek road (2003, J. Flaig coll), 12.5 miles SSW of South Fork. On its noxious weeds website, the Colorado Department of Agriculture shows two more locations for Pilosella aurantiaca (under its old name Hieracium aurantiacum) in the Watershed (without vouchers in SEINet), one also in Rio Grande Co, the other in Conejos Co—all within twenty miles of one another. These three records of the species would be the only ones from the Rio Grande drainage as a whole. Note that iNaturalist has two more observations of the plant, both the San Juans southwest of Del Norte Peak, Rio Grande Co (2023). These records and many more from central Colorado's Front Range form a population isolated from the USA distribution, which largely runs across the northern one-third tier of states. This exotic species is on Colorado's A list of "noxious weeds." (It is protected in the alpine regions of Europe, where it is native).
- Annotation