 Spiny button-like flower heads in umbels of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek park, on Deer Run Trail. College Station, June 15, 2008
 Flower heads in umbels of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 9, 2019
 Dry seed heads of Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, October 11, 2012
 Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, July 10, 2014
 Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, July 1, 2014
 Flowers of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, July 10, 2014
 Close up of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, July 1, 2014
 Spiny button-like flowerheads of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) near Deer Run Trail in Lick Creek Park. College Station, Texas, July 4, 2013
 Spiny button-like flowerheads of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, May 22, 2012
 Spiny button-like flowerheads of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 13, 2022
 Spiny button-like flowerheads of button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) near Deer Run Trail in Lick Creek Park. College Station, Texas, June 8, 2008
 Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 9, 2019
 Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 4, 2010
 Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) with a butterfly in dew in Lick Creek Park. College Station, Texas, June 1, 2010
 Spiny flowerhead of Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, June 15, 2008
 Spiny flowerhead of Button snakeroot (yuccaleaf snakeroot, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 9, 2019
 Button snakeroot (Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, July 10, 2014
 Flower head of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 3, 2018
 Button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, July 24, 2013
 Button snakeroot (Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, May 10, 2012
 Button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 3, 2018
 Button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 10, 2012
 Flowers of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 10, 2012
 Blooming button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 10, 2012
 Flowers of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 3, 2018
 Umbels of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 20, 2012
 Umbels of flowers of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 10, 2012
 Spiny flowers of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 10, 2012
 Spiny head of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 20, 2012
 Dense apical umbel of flowers of button snakeroot (rattlesnake master, Eryngium yuccifolium) in Lick Creek Park. College Station, Texas, June 10, 2012
 Delta flower scarab beetles (Trigonopeltastes delta) on button snakeroot in Lick Creek Park. College Station, Texas, July 1, 2014
 Flower of Hooker s eryngo (Eryngium hookeri) in Lick Creek Park. College Station, Texas, July 3, 2014
 Canadian black snakeroot (Sanicula canadensis) in Lick Creek Park. College Station, Texas, April 22, 2021
 Leaves of Canadian black snakeroot (Sanicula canadensis) in Lick Creek Park. College Station, Texas, March 31, 2024
 White mistflower (Ageratina havanensis, Havana snakeroot) with a caterpillar in Lick Creek Park. College Station, Texas, October 19, 2008
 Boneset flowers (white snakeroot, Ageratina altissima) on Raccoon Run Trail in Lick Creek Park. College Station, Texas, October 15, 2020
 White mistflower (Havana snakeroot, Ageratina havanensis, Eupatorium havanense) on Iron Bridge Trail in Lick Creek Park. College Station, Texas, October 3, 2008
 White mistflower (Havana snakeroot, Ageratina havanensis, Eupatorium havanense) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, October 16, 2024
 Hooker s eryngo (Eryngium hookeri) in Lick Creek Park. College Station, Texas, July 15, 2014
 Thistle flower heads (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 7, 2012
 Hooker s eryngo (Eryngium hookeri) on Racoon Run Trail in Lick Creek Park. College Station, Texas, July 3, 2014
 Prickly flowers of Hooker s eryngo (Eryngium hookeri) in Lick Creek Park. College Station, Texas, July 3, 2014
 Immature flower heads of buttonbush (Cephalanthus occidentalis) near Nature Center in Lick Creek Park. College Station, Texas, July 11, 2020
 Flower heads of blue eryngo (Eryngium planum) in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 29, 2016
 Hooker s eryngo (Eryngium hookeri) in Lick Creek Park. College Station, Texas, June 30, 2014
 Flower heads of Drummond wild onion (Allium drummondii) in Lick Creek Park. College Station, Texas, April 17, 2023
 Flower and fluffy seed heads of firewheel (Gaillardia pulchella) near the creek under power lines in Bee Creek Park. College Station, Texas, July 21, 2020
 Seed heads of cattails (Typha) in Lick Creek Park. College Station, Texas, July 14, 2022
 Prickly seeds with hooks of Canadian black snakeroot (Sanicula canadensis) in Antique Rose Emporium. Independence, Texas, July 2, 2022
 Silky flower heads of fragrant cudweed (sweet everlasting, Pseudognaphalium obtusifolium) on Racoon Run Trail in Lick Creek Park. College Station, Texas, October 19, 2008
 Bur-like seed capsules with hooks of Canadian black snakeroot (Sanicula canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, July 28, 2020
 Flower bud of summer thistle in Lick Creek Park. College Station, Texas, July 22, 2014
 Flower of summer thistle in Lick Creek Park. College Station, Texas, July 22, 2014
 Flower of summer thistle in Lick Creek Park. College Station, Texas, July 15, 2014
 Passion flower (Passiflora) in Lick Creek Park. College Station, Texas, July 10, 2014
 Dry seed heads of spotted beebalm (Monarda punctata) on a sewage line right of way in Lick Creek Park. College Station, Texas, July 18, 2020
 Button stage (immature) mushrooms Amanita pubescens in Lick Creek Park. College Station, Texas, July 16, 2018
 Flower of Partridge pea (Cassia fasciculata) in Lick Creek Park. College Station, Texas, July 1, 2014
 Flower of water primrose (Ludwigia) in Lick Creek Park. College Station, Texas, July 15, 2014
 Green passion flower (Passiflora lutea) in Lick Creek Park. College Station, Texas, July 22, 2014
 Flower of nits-and-lice (Hypericum drummondii) in Lick Creek Park. College Station, Texas, July 22, 2014
 Flower of Pigeon wings (Clitoria mariana) in Lick Creek Park. College Station, Texas, July 10, 2014
 Flower of Nits-and-lice (Hypericum drummondii) in Lick Creek Park. College Station, Texas, July 26, 2014
 Flower bud of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 1, 2014
 Flower buds of green milkweed (Asclepias obovata(?)) taken from Lick Creek Park. College Station, Texas, July 29, 2014
 St. Andrew cross flower (Hypericum, Ascyrum hypericoides) in Lick Creek Park. College Station, Texas, July 26, 2014
 Summer-blooming thistle flower (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 10, 2014
 Flower bud of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 10, 2014
 Flower of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 1, 2014
 Flower of Maryland meadow-beauty (Rhexia mariana) in Lick Creek Park. College Station, Texas, July 1, 2014
 Tiny seed heads of umbellifer plants Tansy dogshade (Limnosciadium pinnatum, Apiaceae), collected from wet area behind sewage treatment plant in Lick Creek Park. College Station, Texas, July 29, 2023
 Delta flower scarab beetle (Trigonopeltastes delta) in Lick Creek Park. College Station, Texas, July 10, 2014
 Close-up of tiny seed heads of umbellifer plants Tansy dogshade (Limnosciadium pinnatum, Apiaceae), collected from wet area behind sewage treatment plant in Lick Creek Park. College Station, Texas, July 29, 2023
 Flower of Southern wild senna (Senna marilandica, Cassia) in Lick Creek Park. College Station, Texas, July 26, 2014
 Dry seed heads in Lick Creek Park. College Station, Texas, May 4, 2011
 Hooker s eryngo (Eryngium hookeri) in Lick Creek Park. College Station, Texas, June 22, 2012
 Leaves of Canadian black snakeroot (Sanicula canadensis) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest near Huntsville. Texas, April 16, 2019
 White mistflower (Ageratina havanensis, Havana snakeroot) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 15, 2022
 Shoots of Canadian black snakeroot (Sanicula canadensis) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 16, 2022
 Leaves of Canadian black snakeroot (Sanicula canadensis) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 16, 2022
 Blooming white mistflower (Ageratina havanensis, Havana snakeroot) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 15, 2022
 Thistle (Cirsium engelmannii) heads in Lick Creek Park. College Station, Texas, June 22, 2012
 Hooker s eryngo (Eryngium hookeri) near Birch Creek Unit of Somerville Lake State Park. Texas, July 19, 2014
 Red-banded Hairstreak (Calycopis cecrops) butterfly on white mistflower (Havana snakeroot, Ageratina havanensis, Eupatorium havanense) on Caney Creek Trail in Sam Houston National Forest, near Huntsville. Texas, October 18, 2009
 Fluffy seed heads of cattails (Typha) in Lick Creek Park. College Station, Texas, August 7, 2022
 Little wood satyr butterfly, Hermeuptychia (Euptychia) hermes, on white mistflower (Havana snakeroot, Ageratina havanensis, Eupatorium havanense) on Caney Creek Trail in Sam Houston National Forest, near Huntsville. Texas, October 18, 2009
 Button lichen (Buellia) in Lick Creek Park. College Station, Texas, January 18, 2019
 Button mushrooms (Agaricus) in Lick Creek Park. College Station, Texas, June 21, 2019
 White mistflower (Havana snakeroot, Ageratina havanensis, Eupatorium havanense) on Richards Loop Trail in Sam Houston National Forest. Texas, October 20, 2024
 Coreopsis flower in Lick Creek Park. College Station, Texas, May 20, 2014
 Button of a mushroom Amanita pubescens in Lick Creek Park. College Station, Texas, October 3, 2018
 Button of Amanita pubescens mushroom in Lick Creek Park. College Station, Texas, June 28, 2018
 Seed heads of soft golden aster (Bradburia pilosa) in Lick Creek Park. College Station, Texas, October 10, 2022
 Seed heads of a plant with narrow leaves of aster family in Lick Creek Park. College Station, Texas, April 17, 2023
 Meadow pink flower in Lick Creek Park. College Station, Texas, May 20, 2014
 Button mushrooms Agaricus sect. Xanthodermatei in Lick Creek Park. College Station, Texas, October 5, 2018
 Common button lichen (Buellia stillingiana) on an oak in Lick Creek Park. College Station, Texas, January 18, 2019
 Hemispherical reproductive heads of a liverwort Reboulia hemisphaerica on Post Oak Trail in Lick Creek Park. College Station, Texas, February 24, 2019
 Fluffy seed heads of soft golden aster (Bradburia pilosa) in Lick Creek Park. College Station, Texas, September 8, 2023
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