https://www.biodiversitylibrary.org/name/Cirsium_subrivulare
The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity...
biodiversity heritage librarybibliographycirsium
https://pfaf.org/user/Plant.aspx?LatinName=Cirsium+maackii
Cirsium maackii is a PERENNIAL growing to 1 m (3ft 3in). It is in flower from June to September, and the seeds ripen from June to September. The species is...
plant databasecirsiumpfaf
https://pfaf.org/USER/Plant.aspx?LatinName=Cirsium+spicatum
Cirsium spicatum is a PERENNIAL growing to 1.8 m (6ft). It is in flower from September to October, and the seeds ripen from September to October. The species...
plant databasecirsiumspicatumpfaf
https://pfaf.org/USER/Plant.aspx?LatinName=Cirsium+arizonicum
Cirsium arizonicum is an evergreen Biennial growing to 1 m (3ft 3in) by 0.5 m (1ft 8in) at a fast rate. See above for USDA hardiness. It is hardy to UK zone 5....
cirsium arizonicumarizona thistleplant databasepfaf
https://pfaf.org/user/Plant.aspx?LatinName=Cirsium+serratuloides
Cirsium serratuloides is a PERENNIAL growing to 1.2 m (4ft). It is in flower from July to October, and the seeds ripen from July to October. The species is...
plant databasecirsiumpfaf
https://www.rhs.org.uk/plants/212769/cirsium-coulteri/details
Find help & information on Cirsium coulteri from the RHS
cirsiumrhs
https://www.rhs.org.uk/plants/250747/cirsium-palustre-love-and-hate/details
Find help & information on Cirsium palustre 'Love and Hate' from the RHS
cirsium palustrelovehaterhs