Maryland Checklist - Genus: Cirsium - all-time (Total: 7)   

PhotosCommon NameGenusSpeciesCategoryFamilyOrderClassKingdom
1 Tall ThistleCirsiumaltissimum Aster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae
2 Canada ThistleCirsiumarvense Aster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae
3 Field ThistleCirsiumdiscolor Aster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae
4 Yellow ThistleCirsiumhorridulum var. horridulumAster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae
5 Swamp ThistleCirsiummuticum Aster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae
6 Pasture ThistleCirsiumpumilum Aster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae
7 Bull ThistleCirsiumvulgare Aster FamilyAsteraceaeAsteralesMagnoliopsidaPlantae

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