 Rose vervain (Glandularia canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, February 28, 2023
 Rose vervain (Glandularia canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
 Rose vervain (Glandularia canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
 Rose vervain (Glandularia canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 3, 2024
 Blooming rose vervain (Glandularia canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
 Rose vervain (Glandularia canadensis) on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
 Rose vervain (Glandularia canadensis) on North Wilderness Trail in Sam Houston National Forest near Montgomery. Texas, April 14, 2022
 Rose vervain (Glandularia canadensis) at Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2019
 Rose vervain (Glandularia canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
 Rose vervain (Glandularia canadensis) in dew on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
 Flowers of rose vervain (Glandularia canadensis) on North Wilderness Trail in Sam Houston National Forest near Montgomery. Texas, April 14, 2022
 Flower of rose vervain (Glandularia canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, February 16, 2019
 Flowers of rose vervain (Glandularia canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
 Flowers of rose vervain (Glandularia canadensis) at Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2019
 Rose vervain (Glandularia canadensis) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Texas, October 20, 2024
 Rose vervain (Glandularia canadensis) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
 Rose vervain (Glandularia canadensis) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 1, 2019
 Rose vervain (Glandularia canadensis) on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, March 28, 2021
 Rose vervain (Glandularia canadensis) on Forest Service Road 231 near North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 5, 2022
 Flowers of rose vervain (Glandularia canadensis) on Forest Service Road 231 near North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 5, 2022
 Blooming rose vervain (Glandularia canadensis) on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 5, 2024
 Rose vervain (Glandularia canadensis) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 11, 2023
 Pink flowers of rose vervain (Glandularia canadensis) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, March 11, 2023
 Rose vervain (Verbena canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richardson, Texas, February 22, 2009
 Close up of a cluster of flowers of rose vervain (Verbena canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richardson, Texas, February 22, 2009
 Canada wild rye (Elymus canadensis)(?) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
 Spikes of Canada wild rye (Elymus canadensis)(?) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
 Artichoke-shaped gall on on the top of a shoot of goldenrod Solidago canadensis on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022
 Rock-rose (frostweed, sunrose, Helianthemum carolinianum) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Slender vervain (Verbena rigida) on road FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
 Galls on leaves of goldenrod Solidago canadensis caused by gall midges Asteromyia carbonifera with symbiotic fungus Botryosphaeria dothidea on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 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
 Leaves of goldenrod Solidago canadensis with raised white cushions caused by gall midges Asteromyia carbonifera and symbiotic fungus Botryosphaeria dothidea inside the galls on Richards Loop Trail in Sam Houston National Forest. Texas, July 10, 2022
 Macartney rose (Rosa bracteata) at Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
 Macartney rose (Rosa bracteata) on Richards Loop Trail in Sam Houston National Forest. Texas, April 28, 2020
 Canada wildrye (Elymus canadensis)(?) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Blooming Macartney rose (Rosa bracteata) on Richards Loop Trail in Sam Houston National Forest. Texas, April 28, 2020
 Macartney rose (Rosa bracteata) with flower beetles on Richards Loop Trail in Sam Houston National Forest. Texas, April 28, 2020
 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
 Blooming Rock-rose (frostweed, sunrose, Helianthemum carolinianum) in Sam Houston National Forest on Little Lake Creek Loop Trail. Richards, Texas, April 4, 2010.
 Shoot of oak on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Yellow flower of Rock-rose (frostweed, sunrose, Helianthemum carolinianum) in Sam Houston National Forest on Little Lake Creek Loop Trail. Richards, Texas, April 4, 2010.
 Shoot of sweetgum on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Shoot of beautyberry on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Thistle (Cirsium) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Young leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Blooming dewberry on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Young leaves of oak on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Yellow Coreopsis flower on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Pink phlox flower on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Back lit flowers of dewberry on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Young leaves of hickory on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Young leaves of beautyberry on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Back lit young leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Rose-tinted Amanita mushroom (Amanita roseotincta, A. roseitincta) at road FS 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 25, 2023
 Woolly-white (Hymenopappus) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Underside of rose-tinted Amanita mushroom (Amanita roseotincta, A. roseitincta) at road FS 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 25, 2023
 Paper mulberry (Broussonetia papyrifera)(?) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Reddish leaf of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Flowers of woolly-white (Hymenopappus) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Young leaf of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Blooming poison ivy (Toxicodendron radicans) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Racemed milkwort (Polygala polygama) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Red hairy shoot of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Blue eyed grass (Sisyrinchium) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Reddish shoot of mustang grape on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Green milkweed (Asclepias viridis) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Reddish shoots of some common bush on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Nodding beardtongue (Penstemon laxiflorus) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Blooming woolly-white (Hymenopappus) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Cross section of rose-tinted Amanita mushroom (Amanita roseotincta, A. roseitincta) at road FS 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 25, 2023
 Small plants of poison ivy (Toxicodendron radicans) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Flowers of blue eyed grass (Sisyrinchium) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Flowers of nodding beardtongue (Penstemon laxiflorus) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Shoot of paper mulberry (Broussonetia papyrifera) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Blooming bull thistle (Cirsium horridulum) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Top view of Bull thistle (Cirsium horridulum) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Close-up of blue eyed grass (Sisyrinchium) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 White-flowered milkweed (Asclepias variegata) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Baptisia nuttalliana (Nuttall s wild indigo) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 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
 Pleated leaves of Carolina buckthorn (Frangula caroliniana) on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Dwarf sundew (Drosera brevifolia) on a sandy path on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Tiny cup fungus Hyaloscypha britannica on underside of a pine log on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Blooming woolly-white (Hymenopappus) with a flower beetle on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Swarming spine fungus (Mucronella calva) on underside of a pine log on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Flower buds of white-flowered milkweed (Asclepias variegata) on Richards Loop Trail in Sam Houston National Forest. Texas, April 21, 2022
 Rock-rose on Forest Service Road 203 on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
 Tiny cups of Ascomycete fungus Hyaloscypha britannica on underside of a pine log on Richards Loop Trail in Sam Houston National Forest. Texas, April 9, 2022
 Rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
 Rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
 Macartney rose (Rosa bracteata) in a pine forest on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
 Blooming rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
 Blooming rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
 Macartney rose (Rosa bracteata) in Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, May 26, 2012
 Rock-rose (Helianthemum carolinianum) on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
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