Hill's Thistle6
- COSEWIC Assessment and status report on Hill's thistle (Cirsium hillii) in Canada. (wikipedia.org)
- Population viability assessment for Hill's thistle (Cirsium hillii (Canby) Fernald) (PDF). (wikipedia.org)
- Flora of North America, Hill's thistle, Cirsium pumilum (Nuttall) Sprengel var. (wikipedia.org)
- Special plant abstract for Cirsium hillii (Hill's thistle)" (PDF). (wikipedia.org)
- Hill's Thistle often goes by Latin name Cirsium hillii but it is now treated as a variety of Cirsium pumilum (Pasture Thistle), var. (minnesotawildflowers.info)
- Hill's thistle (Cirsium pumilum var. (minnesotaseasons.com)
Species1
- pumilum a more eastern species. (minnesotawildflowers.info)
Canby4
- Population viability assessment for Hill's thistle (Cirsium hillii (Canby) Fernald) (PDF). (wikipedia.org)
- hillii (Canby) B. Boivin Biota of North America Program 2014 county distribution map, Cirsium hillii Higman, P.J. (wikipedia.org)
- Endemic Basionym: Cnicus hillii Canby Gard. (floranorthamerica.org)
- Cirsium hillii (Canby) Fernald Cirsium pumilum subsp. (floranorthamerica.org)
Flora of Nort1
- Flora of North America, Hill's thistle, Cirsium pumilum (Nuttall) Sprengel var. (wikipedia.org)
Subsp2
- Cirsium siculum subsp. (floracatalana.cat)
- Galium pumilum subsp. (floracatalana.cat)
Spreng2
- Cirsium rheginum Spreng. (floracatalana.cat)
- Cirsium siculum Spreng. (floracatalana.cat)
Vulgare1
- Additionally, native thistles are noticeably less prickly to weedy or non-native thistles like Bull Thistle (Cirsium vulgare) or Canada thistle (Cirsium arvense). (ibase.com.sg)
Flowers2
- Flowers of Cirsium pumilum are reportedly sweetly scented. (floranorthamerica.org)
- Thistles Seeds Cirsium texanum (flowers if first year) pumilum var hillii (three inch flower heads) discolor Field Thistle (can reach 10' tall) (In the Midwest, ruby-throated hummingbirds (Archilochus colubris) commonly visit native field thistle for nectar. (ibase.com.sg)
Canada2
- COSEWIC Assessment and status report on Hill's thistle (Cirsium hillii) in Canada. (wikipedia.org)
- Canada thistle (Cirsium arvense) is a persistent perennial weed that causes significant crop yield losses.It reproduces through both seed and root regeneration, but the latter is the most successful. (ibase.com.sg)
Plant1
- Special plant abstract for Cirsium hillii (Hill's thistle)" (PDF). (wikipedia.org)