Rose vervain (Glandularia canadensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
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 Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 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) at Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2019
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) 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, April 9, 2022
Flower of rose vervain (Glandularia canadensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, February 16, 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 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) 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 North Wilderness Trail in Sam Houston National Forest near Montgomery. Texas, April 14, 2022
Flowers of rose vervain (Glandularia canadensis) on North Wilderness Trail in Sam Houston National Forest near Montgomery. Texas, April 14, 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) 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
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
Rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 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
Flower of rock-rose (frostweed, sunrose, Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Blooming rock-rose (frostweed, sunrose, Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Yellow flower of rock-rose (frostweed, sunrose, Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Macartney rose (Rosa bracteata) on Richards Loop Trail in Sam Houston National Forest. Texas, April 28, 2020
Blooming Macartney rose (Rosa bracteata) on Richards Loop Trail in Sam Houston National Forest. Texas, April 28, 2020
Canada wild rye (Elymus canadensis)(?) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
Rock-rose on Forest Service Road 203 on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
Macartney rose (Rosa bracteata) with flower beetles on Richards Loop Trail in Sam Houston National Forest. Texas, April 28, 2020
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
Rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
Canada wildrye (Elymus canadensis)(?) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
Slender vervain (Verbena rigida) on road FS203 near Richards Loop Trail in Sam Houston National Forest. Texas, April 13, 2024
Blooming rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
Rock-rose (Helianthemum carolinianum) on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
Blooming rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
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
Yellow flower of rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
Yellow flower of rock-rose (Helianthemum carolinianum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2023
Yellow flower of rock-rose (Helianthemum carolinianum) on Road FS 203 near on Richards Loop Trail in Sam Houston National Forest. Texas, March 30, 2024
Red shoot of oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Young red leaves of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Shoot of sumac on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Blooming hawthorn on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Orange shoot of an oak on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Young oak leaves on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Blooming blackberry on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Shoot of sweetgum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Flower of blackberry on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Rush (Juncus) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
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
Young leaves of sumac(?) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
White flowers of blackberry on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Flowers of rush (Juncus) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Young leaves of sumac(?) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Venation of a sassafras leaf on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Young leaves of sassafras on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Some young glossy leaves on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Shoot with glossy leaves on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Young leaves of sweetgum on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Shoot of Virginia creeper on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Vervain (Verbena) in Antique Rose Emporium. Independence, Texas, March 31, 2020
Shoot of blackjack oak on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
Lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Fresh leaves of Virginia creeper on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Celestial lily (Nemastylis geminiflora) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Racemed milkwort (Polygala polygama) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Young leaves of elm on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
Young leaves of Virginia creeper on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Blue eyed grass (Sisyrinchium) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Nodding beardtongue (Penstemon laxiflorus) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Shoot of paper mulberry (Broussonetia papyrifera) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Fresh leaves of blackjack oak on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
Red shoot of mustang grape (Vitis mustangensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Young leaves of blackjack oak (Quercus marilandica) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Flowers of lyreleaf sage (Salvia lyrata) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Shoot of Chinese tallow (Sapium sebiferum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Peeling puffball mushrooms (Lycoperdon marginatum) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Cap of scaly sawgill mushroom (Neolentinus lepideus) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Flowers of blue eyed grass (Sisyrinchium) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Yellow wood sorrel (Oxalis stricta) on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Some brown cup Ascomycete fungus on a site of old bonfire on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Yellow wood sorrel (Oxalis stricta) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Blackseed speargrass (oats needle grass, Piptochaetium avenaceum) in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
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
Flowers of yellow wood sorrel (Oxalis stricta) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Raspberry slime mold (Tubifera ferruginosa) on a stump on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Fragrant sumac (Rhus aromatica) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
Violet wood sorrel (shamrock, Oxalis violacea) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
Wolf s milk slime mold (Lycogala epidendrum) on a log on Richards Loop Trail in Sam Houston National Forest. Texas, March 26, 2020
Missouri violet (Viola missouriensis) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, March 8, 2020
Young leaves of mustang grape (Vitis mustangensis) on Richards Loop Trail in Sam Houston National Forest. Texas, March 18, 2020
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