Similar(1): Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) on ... Sam Houston National Forest. Texas, March 8, 2026
Similar(2): Yellow thistle (Bull thistle, Cirsium horridulum) on Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
Similar(3): Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) on ... Creek Park. College Station, Texas, March 26, 2019
Similar(4): Yellow thistle (Bull thistle, Cirsium horridulum) on Lone Star Trail ... Forest, near Huntsville. Texas, April 8, 2018
Similar(5): Yellow thistle (Bull thistle, Cirsium horridulum) on Post Oak Trail in Lick Creek Park. College Station, Texas, March 26, 2019
Similar(6): Flower of yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 5, 2019
Similar(7): Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 14, 2019
Similar(8): Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 11, 2018