Thistle (Cirsium)
Every species of the genus Cirsium in the catalogue.
- Vancouver thistle (Cirsium vancouverense)
- Tall thistle (Cirsium altissimum)
- Rose thistle (Cirsium andersonii)
- Franciscan thistle (Cirsium andrewsii)
- Arizona thistle (Cirsium arizonicum)
- Barneby's thistle (Cirsium barnebyi)
- Palouse thistle (Cirsium brevifolium)
- Clustered thistle (Cirsium brevistylum)
- Prairie thistle (Cirsium canescens)
- Queen Anne's thistle (Cirsium canum)
- Soft thistle (Cirsium carolinianum)
- Ashland thistle (Cirsium ciliolatum)
- Fish Lake thistle (Cirsium clavatum)
- Slough thistle (Cirsium crassicaule)
- Peregrine thistle (Cirsium cymosum)
- Douglas' thistle (Cirsium douglasii)
- Dwarf thistle (Cirsium drummondii)
- Eaton's thistle (Cirsium eatonii)
- Edible thistle (Cirsium edule)
- Engelmann's thistle (Cirsium engelmannii)
- Elk thistle (Cirsium foliosum)
- Fountain thistle (Cirsium fontinale)
- Graham's thistle (Cirsium grahamii)
- Melancholy Thistle (Cirsium heterophyllum)
- White thistle (Cirsium hookerianum)
- Yellow thistle (Cirsium horridulum)
- Alpen-kratzdistel (Cirsium spinosissimum)
- Suisun thistle (Cirsium hydrophilum)
- Kamchatka thistle (Cirsium kamtschaticum)
- Le Conte's thistle (Cirsium lecontei)
- Longstyle thistle (Cirsium longistylum)
- Mexican thistle (Cirsium mexicanum)
- Mojave thistle (Cirsium mohavense)
- New Mexico thistle (Cirsium neomexicanum)
- Nuttall's thistle (Cirsium nuttallii)
- Cobwebby thistle (Cirsium occidentale)
- Yellowspine thistle (Cirsium ochrocentrum)
- Ownbey's thistle (Cirsium ownbeyi)
- Parry's thistle (Cirsium parryi)
- Sand dune thistle (Cirsium pitcheri)
- Palo Alto thistle (Cirsium praeteriens)
- Wyoming thistle (Cirsium pulcherrimum)
- Pasture thistle (Cirsium pumilum)
- Pyrenean thistle (Cirsium pyrenaicum)
- Alameda County thistle (Cirsium quercetorum)
- Fewleaf thistle (Cirsium remotifolium)
- Sandhill thistle (Cirsium repandum)
- Rydberg's thistle (Cirsium rydbergii)
- Rough thistle (Cirsium scabrum)
- Meadow thistle (Cirsium scariosum)
- Texas thistle (Cirsium texanum)
- Cliff thistle (Cirsium turneri)
- Wavyleaf thistle (Cirsium undulatum)
- Sacramento Mountain thistle (Cirsium vinaceum)
- Bull thistle (Cirsium vulgare)
- Wheeler's thistle (Cirsium wheeleri)
- Wright's thistle (Cirsium wrightii)
- Yellow thistle (Cirsium erisithales)
- Cabbage Thistle (Cirsium oleraceum)
- Cretan thistle (Cirsium creticum)
- Spiny thistle (Cirsium echinatum)
- Italian thistle (Cirsium italicum)
- Brook thistle (Cirsium rivulare)
- Meadow Thistle (Cirsium dissectum)
- Tuberous thistle (Cirsium tuberosum)
- Woolly thistle (Cirsium eriophorum)
- Montpellier thistle (Cirsium monspessulanum)
- Forest thistle (Cirsium alsophilum)
- Marsh thistle (Cirsium bourgaeanum)
- Richter's thistle (Cirsium richterianum)
- Smooth thistle (Cirsium glabrum)
- Moris' thistle (Cirsium morisianum)
- Toothed-scale thistle (Cirsium odontolepis)
- Dakiba-Hime-Azami (Cirsium amplexifolium)
- Creeping thistle (Cirsium arvense)
- Cirsium brevicaule
- Cirsium buergeri
- Cirsium chinense
- Cirsium coreanum
- Cirsium dipsacolepis
- Eaton's Thistle (Cirsium eatoni)
- Japanese thistle (Cirsium japonicum)
- Cirsium lepskyle
- Cirsium lineare
- Cirsium maackii
- Cirsium maritimum
- Cirsium nipponicum
- Cirsium oligophyllum
- Pale thistle (Cirsium pallidum)
- Marsh thistle (Cirsium palustre)
- Cirsium pectinellum
- Cirsium pendulum
- Cirsium purpuratum
- Cirsium schantarense
- Cirsium scopulorum
- Cirsium serratuloides
- Cirsium setosum
- Cirsium sieboldii
- Cirsium spicatum
- Cirsium spinosum
- Tsukushi-Azami (Cirsium suffultum)
- Cirsium verutum
- Virginia thistle (Cirsium virginianum)
- Cirsium yezoense