Source Categories
Plant records may combine internal compiled data, public plant references, hardiness-zone context, and image-source pages. Each plant page lists the source categories currently supporting that record.
When sources conflict or a plant-specific source has not been reviewed, the page uses general guidance and avoids precise scientific claims.
Image Sources
Plant photos are currently referenced from Wikipedia or Wikimedia Commons when available. Image credits link back to the relevant source page.
Image licenses are controlled by their original contributors and may differ from the site text and data policy.
Current Source Records
Does sorting by color improve classification of honey bee pollen pellets?
Applications in Plant Sciences / reviewed 2026-10-14
pollen color variability, limits of color-only identification, standardized color comparison USDA Plant Hardiness Zone Map
United States Department of Agriculture / reviewed 2026-07-12
USDA hardiness zone context Wikipedia and Wikimedia Commons
Wikimedia Foundation contributors / reviewed 2026-07-12
plant image, image credit link USDA PLANTS Database
United States Department of Agriculture / reviewed 2026-07-12
scientific name, common name, distribution context, plant classification NC State Extension Gardener Plant Toolbox
North Carolina State University Extension / reviewed 2026-07-12
plant identification, flower description, landscape and growing context Missouri Botanical Garden Plant Finder
Missouri Botanical Garden / reviewed 2026-07-12
plant identification, flowering context, garden plant descriptions Lady Bird Johnson Wildflower Center Plant Database
The University of Texas at Austin / reviewed 2026-07-12
native plant context, flowering context, pollinator plant notes The Anther's Promise pollen library
The Anther's Promise / reviewed 2026-10-11
pollen color category, bloom period, pollen morphology, bee resource context Pollen & Plant Bloom Dates
New Jersey Beekeepers Association / reviewed 2026-10-14
New Jersey bee-forage plant list, regional bloom windows, common-name context A Manual of Bee Husbandry
New Jersey State Library / reviewed 2026-10-14
historical New Jersey bee-forage list, botanical-name mapping, regional bloom windows Flowering Plants
North Carolina State Beekeepers Association / reviewed 2026-10-11
North Carolina bloom periods, approximate pollen color, scientific name Garden Plants for Honey Bees
Central Coast Beekeepers Association of Oregon / reviewed 2026-10-11
pollen color category, bloom month, pollen value, nectar value Missouri Plants botanical descriptions
Missouri Plants / reviewed 2026-10-11
species identification, native range context, flower and anther description, bloom period Focus on Natives: Ironweed
Ohio State University Extension Lorain County Master Gardeners / reviewed 2026-10-11
ironweed pollen color observation, native plant context, pollinator value Selecting Plants for Pollinators regional guides
Pollinator Partnership / reviewed 2026-10-11
North American regional plant selection, native range context, bloom timing, pollinator value Hairy Mountain Mint plant profile
Alamance County Beekeepers Association / reviewed 2026-10-11
hairy mountain mint pollen pellet color, native range, bloom period, bee forage context Maíz (Zea mays L.)
Servicio Nacional de Inspección y Certificación de Semillas, Government of Mexico / reviewed 2026-10-11
maize center of origin, maize domestication context, scientific name Flora of Florida (Franck 2026)
Florida Museum of Natural History / reviewed 2026-10-11
current Florida plant taxonomy, scientific name, regional flora context
Applications in Plant Sciences / reviewed 2026-10-14
pollen color variability, limits of color-only identification, standardized color comparison USDA Plant Hardiness Zone Map
United States Department of Agriculture / reviewed 2026-07-12
USDA hardiness zone context Wikipedia and Wikimedia Commons
Wikimedia Foundation contributors / reviewed 2026-07-12
plant image, image credit link USDA PLANTS Database
United States Department of Agriculture / reviewed 2026-07-12
scientific name, common name, distribution context, plant classification NC State Extension Gardener Plant Toolbox
North Carolina State University Extension / reviewed 2026-07-12
plant identification, flower description, landscape and growing context Missouri Botanical Garden Plant Finder
Missouri Botanical Garden / reviewed 2026-07-12
plant identification, flowering context, garden plant descriptions Lady Bird Johnson Wildflower Center Plant Database
The University of Texas at Austin / reviewed 2026-07-12
native plant context, flowering context, pollinator plant notes The Anther's Promise pollen library
The Anther's Promise / reviewed 2026-10-11
pollen color category, bloom period, pollen morphology, bee resource context Pollen & Plant Bloom Dates
New Jersey Beekeepers Association / reviewed 2026-10-14
New Jersey bee-forage plant list, regional bloom windows, common-name context A Manual of Bee Husbandry
New Jersey State Library / reviewed 2026-10-14
historical New Jersey bee-forage list, botanical-name mapping, regional bloom windows Flowering Plants
North Carolina State Beekeepers Association / reviewed 2026-10-11
North Carolina bloom periods, approximate pollen color, scientific name Garden Plants for Honey Bees
Central Coast Beekeepers Association of Oregon / reviewed 2026-10-11
pollen color category, bloom month, pollen value, nectar value Missouri Plants botanical descriptions
Missouri Plants / reviewed 2026-10-11
species identification, native range context, flower and anther description, bloom period Focus on Natives: Ironweed
Ohio State University Extension Lorain County Master Gardeners / reviewed 2026-10-11
ironweed pollen color observation, native plant context, pollinator value Selecting Plants for Pollinators regional guides
Pollinator Partnership / reviewed 2026-10-11
North American regional plant selection, native range context, bloom timing, pollinator value Hairy Mountain Mint plant profile
Alamance County Beekeepers Association / reviewed 2026-10-11
hairy mountain mint pollen pellet color, native range, bloom period, bee forage context Maíz (Zea mays L.)
Servicio Nacional de Inspección y Certificación de Semillas, Government of Mexico / reviewed 2026-10-11
maize center of origin, maize domestication context, scientific name Flora of Florida (Franck 2026)
Florida Museum of Natural History / reviewed 2026-10-11
current Florida plant taxonomy, scientific name, regional flora context