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Close-up of fruit of papaya both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Kroger Supermarket. College Station, Texas, July 30, 2026

Cross section of a fruit of tomatillo from Kroger supermarket under both white light and a 365 nm ultraviolet (UV-A) LED flashlight. College Station, Texas, May 27, 2026

Section of tomatillo (Mexican husk tomato) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Kroger Supermarket. College Station, Texas, November 6, 2025

Close-up of fruit of pomegranate both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 12, 2024

Section of fruit of pomegranate both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 12, 2024

Section of fruit of papaya under both white light and a 365 nm ultraviolet (UV-A) LED flashlight from Kroger Supermarket. College Station, Texas, July 30, 2026

Fruit of papaya when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger Supermarket (Bella 41.3 4395 Mexico). College Station, Texas, July 30, 2026

Fruit of pomegranate when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 12, 2024

Section of fruit of a pineapple when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Fruit of purple passionflower (Passiflora incarnata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, May 20, 2026

Half-eaten fruit of maclura tree both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, July 31, 2026

Close-up of fruit of purple passionflower (Passiflora incarnata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, June 29, 2026

Green cabbage head both in natural light and under 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 8, 2024

Layers of yellow onion both in natural light and under 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 3, 2024

Close-up of yellow onion both in natural light and under 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 3, 2024

Section of a cabbage head both in natural light and under 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 8, 2024

Texture of section of yellow onion both in natural light and under 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 3, 2024

Cut pineapple when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Section of an orange from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Slice of an orange from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Section of pineapple when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Section of top of a pineapple when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Slice of a tangerine from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Section of a tangerine from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Indian blanket (Gaillardia pulchella) both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from Bee Creek Park. College Station, Texas, May 18, 2026

Chinaberry (Melia azedarach) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Bee Creek Park. College Station, Texas, March 20, 2026

Interior of globe artichike when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 10, 2024

Close-up of a slice of an orange from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Slice of a section of a tangerine from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Dissected globe artichike when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 10, 2024

Section of globe artichike when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 10, 2024

Close-up of a slice of an tangerine from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 27, 2024

Flowers of thistle (Cirsium) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, collected in Lick Creek Park. College Station, Texas, May 8, 2026

Close-up of section of globe artichike when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 10, 2024

Globe artichike when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight with cross section from Kroger supermarket. College Station, Texas, September 10, 2024

Fresh blacberries (Red Blossom Sales, Inc.) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Horse dung on a sandy path both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Lick Creek Park. College Station, Texas, January 9, 2026

Copper lily (Habranthus texanus) both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from on a lawn on George Bush Drive. College Station, Texas, May 28, 2026

Sandburs spikelets (Cenchrus spinifex) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Wolf Pen Creek Park. College Station, Texas, June 12, 2026

Lemon beebalm (Monarda citriodora) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, collected in Lick Creek Park. College Station, Texas, May 8, 2026

Queen Anne s lace (Daucus carota) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Wolf Pen Creek Park. College Station, Texas, May 22, 2026

Globe artichike (Ocean Mist 4762) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 10, 2024

Pineapple (grown in Costa Rica, PLU No. 6932) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Blooming fringe tree (Chionanthus retusus) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Wolf Pen Creek Park. College Station, Texas, March 18, 2026

Section of pineapple (grown in Costa Rica, PLU No. 6932) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, November 15, 2024

Section of globe artichike (Ocean Mist 4762) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket. College Station, Texas, September 10, 2024

Rain lily (Cooperia drummondii) on a lawn both in natural light and under 365 nm ultraviolet (UV-A) blacklight on Lick Creek Greenway Trail. College Station, Texas, July 20, 2026

Basket flower (Centaurea americana) both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, June 4, 2026

Section of English cucumber from a supermarket (Nature Fresh Farms, Canada, 4593, Kroger) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 25, 2024

Blueberries from a supermarket (Field and Vine Michigan blueberries, Kroger) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 25, 2024

Evening primrose (Oenothera hookeri) both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Leach Teaching Gardens at Texas A and M University. College Station, Texas, July 22, 2026

Rough False Pennyroyal (Hedeoma hispida) both in natural light and under 365 nm ultraviolet (UV-A) blacklight collected on a lawn at crossing of Holleman Drive and Dartmouth Street. College Station, Texas, April 30, 2026

Pink morning glory (Ipomoea carnea) both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Leach Teaching Gardens at Texas A and M University. College Station, Texas, July 22, 2026

This cross-section of a Tomatillo (Mexican husk tomato, Physalis philadelphica) reveals its internal structure under two different lighting conditions. Top Image (Visible Light): The fruit is a two-carpellate berry, which means it is divided into two main internal chambers (locules) filled with seeds. One can see the fleshy placenta in the center where the small, flat, yellowish seeds are attached. The entire fruit is enclosed in a papery, green husk (calyx) that has expanded to cover the berry as it matured. Bottom Image (UV Fluorescence): Under ultraviolet light, the tomatillo displays a striking fluorescence. The bluish-white glow in the center is likely due to phenolic compounds or other metabolites common in plant tissues that fluoresce under UV. The outer ring glows a distinct orange-red. This is characteristic of chlorophyll fluorescence. College Station, Texas, November 6, 2025

Slice of a dragon fruit when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 13, 2024

Pitaya (Dragon fruit) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB supermarket. College Station, Texas, October 13, 2024

Slice of star fruit (Carambola) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Dissected star fruit (Carambola) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Section of star fruit (Carambola) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Red dragon fruit (Ivan Big Tree, 3040) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB Supermarket. College Station, Texas, September 16, 2024

Section of prickly pear (cactus fruit) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Slice of a fresh green kiwi fruit from a supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 26, 2024

Slice of prickly pear (fruit of Opuntia) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Section of a fresh green kiwi fruit from a supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 26, 2024

Details of a slice of prickly pear (cactus fruit) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Dissected red dragon fruit (Ivan Big Tree, 3040) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB Supermarket. College Station, Texas, September 16, 2024

Section of red dragon fruit (Ivan Big Tree, 3040) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB Supermarket. College Station, Texas, September 16, 2024

Seeds of red dragon fruit (Ivan Big Tree, 3040) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB Supermarket. College Station, Texas, September 16, 2024

Close-up of a slice of prickly pear (cactus fruit) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

Close-up of a section of a fresh green kiwi fruit from a supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 26, 2024

Close-up of a slice of a fresh green kiwi fruit from a supermarket (Stellar, Chile, 4030, HEB) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas, August 26, 2024

Whorled milkweed (Asclepias verticillata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Birch Creek Unit of Somerville Lake State Park. Texas, May 16, 2026

American Germander (Teucrium canadense) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Birch Creek Unit of Somerville Lake State Park. Texas, May 16, 2026

Spotted beebalm (Monarda punctata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Birch Creek Unit of Somerville Lake State Park. Texas, May 16, 2026

Handeless coneflower (Echinacea sanguinea) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, May 15, 2026

Lindheimer s beebalm (Monarda lindheimeri) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, May 25, 2026

Dry leaves of hackberry and elm both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 21, 2025

Leaves of sycamore tree both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, December 21, 2025

Inflorescence of Bradford pea both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Wolf Pen Creek Park. College Station, Texas, October 9, 2024

Young leaves of elm both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Lick Creek Park. College Station, Texas, March 12, 2025

Flowers of woolly-white (Hymenopappus artemisiaefolius) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, April 11, 2026

Grass on a sandy path both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Lick Creek Park. College Station, Texas, January 12, 2025

Annual broomweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway Trail. College Station, Texas, October 18, 2024

Leaf of a thistle (Cirsium) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, October 22, 2024

Flowers and fruits of Lantana camara both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Bee Creek Park. College Station, Texas, October 15, 2024

Acorns from oaks both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway Trail. College Station, Texas, October 18, 2024

Flower of powderpuff (Mimosa strigillosa) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Bee Creek Park. College Station, Texas, September 23, 2024

Flowers of narrow-leaf gayfeather (Liatris mucronata(?)) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, July 5, 2026

Flowers of narrowleaf false dragonhead (Physostegia digitalis) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, June 27, 2026

St. Andrew cross flower (Hypericum, Ascyrum hypericoides) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, July 5, 2026

Blue waterleaf (Hydrolea ovata) both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from Road FS203 near Richards Loop Trail in Sam Houston National Forest. Montgomery County, Texas, July 25, 2026

Texture of water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 11, 2024

Maximilian sunflower (Helianthus maximiliani) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, collected on Anderson Street in College Station, Texas, September 10, 2025

Flowers of frostweed (Verbesina virginica) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, September 11, 2024

Polypore mushroom Ganoderma sessile on a lawn both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Bee Creek Park. College Station, Texas, November 21, 2025

Leaves of Smilax on a walking path both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Wolf Pen Creek Park. College Station, Texas, January 30, 2025

Purple gerardia (Agalinis purpurea) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, September 11, 2024

Water fern (Azolla) and duckweed both in natural light and under 365 nm ultraviolet (UV-A) blacklight taken from a pond in Bee Creek Park. College Station, Texas, November 11, 2024

Blooming dog fennel (Eupatorium capillifolium) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park. College Station, Texas, October 13, 2024