of global biomass
Recent research reviewing plant-awareness disparity notes that plants represent more than 80% of global biomass.
PLOS One · 2026 ↗The world beneath your feet
We move through a living world every day while barely knowing its names. Food, fiber, medicine, ecology, history and generations of human knowledge can be growing outside the door. Urban Forager exists to help rebuild that relationship.
Why this knowledge matters
This isn't nostalgia. Plant literacy affects how we understand biodiversity, conservation, food, culture and the ecosystems keeping us alive.
Recent research reviewing plant-awareness disparity notes that plants represent more than 80% of global biomass.
PLOS One · 2026 ↗Across six colleges, most participants did not report confidence identifying plant categories; food, herbs and foraging plants were among the better-known groups.
Natural Sciences Education · 2024 ↗Research describes plant-awareness disparity through attention, knowledge, attitude and relative interest—not simply whether someone can visually see a plant.
CBE—Life Sciences Education ↗Watch · learn · reconnect
Free films, lectures and field instruction. Tap a title and watch it here in the lightbox.
Knowledge becomes relationship
Reciprocity, not extraction
USDA's Indigenous and wild-plant harvesting guidance emphasizes sustainable harvest, permission, giving back, proper identification and maintaining relationships with plant and wildlife relatives.
Read the USDA guide ↗CONTINUE THE RELATIONSHIP
Urban Forager helps you recognize and understand the living world. Zerra continues that relationship through ecological literacy, reciprocity, regeneration and lower-waste living.
Explore ZerraSearch by organism, nutrient, edible part, season, habitat, medicine, history or safety.
Missing photographs are looked up online by scientific name. Community photos are not expert-approved identification images and are not saved for offline use.
Remove a filter or broaden your search. Urban Forager will not invent a match.
Community photo — NOT verified for field identification. Scientific taxon matching does not verify the photographed specimen.
Online photographic reference (Wikimedia Commons or iNaturalist). Not independently expert-verified for field identification; never use a photograph alone to decide edibility. These external images require an internet connection.
Legacy photograph: source rights and identification not audited for this image.
Legacy photograph: source rights and botanical identification have not been fully audited. Do not use an image alone to decide edibility.
Open the attributed reference photograph on Wikimedia Commons ↗
Never eat or medicinally use a wild organism from an app identification alone. Confirm multiple diagnostic features, habitat, season, and species-level characters, then rule out dangerous look-alikes.
Evidence status
No diagnostic features recorded yet.
Recorded edible parts:
USDA SR Legacy archive comparison pending. Listed values are source-reported; a numerical match alone cannot confirm the organism, edible part, or preparation.
| Nutrient / constituent | Source-reported value / review status |
|---|---|
Study values are assay equivalents, not vitamin or mineral amounts. They do not establish medical benefit or safe raw consumption.
| Measured compound group | Study measurement |
|---|---|
These are different published reference records. An inconsistency does not by itself establish which record is incorrect.
| Nutrient | Current USDA record | Original study |
|---|---|---|
No general medicinal claim is presented for this dossier. Nation-specific historical uses may still appear in the Indigenous section.
Indigenous-use research pending. A specific, community-attributed historical or contemporary record has not yet been verified for this dossier. This does not imply that Indigenous peoples never used this organism; we will not invent a community attribution or traditional claim.
No separately verified modern-use/research record has been added. That absence is not evidence of benefit or lack of benefit.
No separately sourced material/utility use has been added for this dossier.
Supports:
Verification pending
This record does not currently contain a claim-level source list. Treat its information as provisional until sources are added and reviewed.
Keep learning beyond each dossier: explore plant identification, nutrition data, herbal safety research, Indigenous ethnobotany, plant-based crafts and responsible foraging. External sources supplement—not replace—safe field identification.
Use more than one source. Field identification, traditional knowledge, nutrition and medical evidence answer different questions. No single database replaces careful identification or qualified local expertise.
Linda Black Elk
An introductory field lesson on edible and medicinal plants of the Northern Plains.
Linda Black Elk
An urban plant walk focused on common food and medicine plants and safer foraging.
Samuel Thayer / Robin Greenfield
A practical field walk identifying more than twenty wild edible plants.
Learn Your Land / Adam Haritan
A focused wild-edible field lesson from Learn Your Land.
Learn Your Land / Adam Haritan
A field lesson on three overlooked edible fruits and the plants that produce them.
Robin Greenfield
A Midwest field walk covering ten approachable plants plus legality, herbal medicine and reconnecting with Earth.
Robin Greenfield
A long-form beginner walk through common edible and medicinal plants of urban Southern California.
Robin Greenfield
A beginner-oriented tour of seventeen common edible plants found across Florida.
Alexis Nikole Nelson / CBS Mornings
A profile of Alexis Nikole Nelson demonstrating urban and woodland foraging and turning wild ingredients into food.
Alexis Nikole Nelson
Urban foraging educator known for approachable wild-food education, cooking, history and plant knowledge.
Open resource ↗Samuel Thayer
Samuel Thayer’s home for responsible foraging education and his field guides to edible wild plants.
Open resource ↗Adam Haritan
Plant, mushroom, tree and ecology education built around careful observation and connection to local landscapes.
Open resource ↗Alan Bergo
Extensive wild-food tutorials, plant and mushroom articles, recipes and preparation techniques from a professional chef and forager.
Open resource ↗Steve Brill
Long-running educational collection covering wild plants, mushrooms, recipes, tours, books and identification resources.
Open resource ↗Robin Greenfield
A large collection of beginner guides, field walks, plant lists, videos and experiential projects centered on food, medicine and reciprocity.
Open resource ↗Robin Greenfield
Self-paced field-based video instruction covering foundations, wild greens, herbs, teas, fruits, roots, nuts, safe harvesting and sustainability.
Open resource ↗Adam Haritan
Self-paced courses in wild mushrooms, trees, ecosystems and old-growth forest ecology.
Open resource ↗Steve Brill & Violet Brill
A long-form video course pairing plant footage with identification, recipes, history, folklore and original illustrations.
Open resource ↗Samuel Thayer
A field-focused reference to edible wild plants of eastern and central North America from a highly experienced forager and author.
Open resource ↗Samuel Thayer
A foundational wild-food book emphasizing identification, harvest, preparation and firsthand experience.
Open resource ↗Samuel Thayer
An in-depth companion volume on identifying, harvesting and preparing wild edible plants.
Open resource ↗Alan Bergo
A culinary deep dive into cooking with wild and cultivated plants, herbs, spices, nuts and starches.
Open resource ↗Robin Greenfield
A freely accessible book about a year of growing and foraging food, with practical actions and extensive references for deeper study.
Open resource ↗Alexis Nikole Nelson
Black Forager’s guide combining foraging with vegan recipes and approachable wild-food education.
Open resource ↗Linda Black Elk & Lisa Iron Cloud / USDA
USDA-supported guidance centered on sustainable harvest, asking permission, reciprocity and positive relationships with Plant Nations.
Open resource ↗USDA Office of Tribal Relations
Regional Indigenous and wild-plant materials, including Midwest resources on dandelion, nettles, purslane and wild rose.
Open resource ↗Daniel E. Moerman / University of Michigan–Dearborn
A major historical ethnobotanical reference connecting plants with documented food, medicine, dye, fiber and other uses by specific Native peoples.
Open resource ↗University of Michigan Museum of Anthropological Archaeology
Online collections related to economic plants and historical traditional plant use, useful for tracing claims back to documented sources.
Open resource ↗USDA Natural Resources Conservation Service
Standardized U.S. plant names, taxonomy, distribution, characteristics, images, checklists and references.
Open resource ↗iNaturalist
Community identification and biodiversity observations. Useful for learning and comparison, but its own guidance says not to rely solely on computer-vision suggestions.
Open resource ↗BONAP
County, state/province and continental plant-distribution maps for checking whether a species is documented in an area.
Open resource ↗Steve Brill, Becky Lerner & Christopher Nyerges
Mobile reference covering hundreds of edible and medicinal plants plus look-alikes, photographs, illustrations and recipes.
Open resource ↗USDA Agricultural Research Service
USDA food-composition database for checking quantitative nutrient data when a wild food is represented.
Open resource ↗National Center for Complementary and Integrative Health
Evidence-oriented botanical fact sheets covering research findings, side effects, cautions and references.
Open resource ↗National Center for Complementary and Integrative Health
A clinical-safety starting point for known and potential interactions between herbs, supplements and medicines.
Open resource ↗Falling Fruit
A collaborative map of urban harvest locations and public food resources. Some locations are explicitly unverified, so verify identity, access and edibility yourself.
Open resource ↗Robin Greenfield
A directory intended to help learners find experienced foragers and classes in their region.
Open resource ↗Robin Greenfield
A directory into hundreds of articles, videos, interviews, books and curated educational resources on foraging and Earth-connected living.
Open resource ↗Alan Bergo
Detailed practical articles on wild plants with identification context, harvest timing, preparation and cooking techniques.
Open resource ↗Steve Brill
Reference material for common edible and medicinal wild plants, mushrooms and recipes.
Open resource ↗USDA Forest Service
Explore native plant fibers, dyes, resins, tannins, oils and other useful materials, with historical and ecological context. Cultural uses vary by community.
Open resource ↗USDA Forest Service / Agriculture Handbook
Technical reference on plant materials used for basketry, weaving and natural dyes. Includes examples of botanical sources and traditional methods.
Open resource ↗Smithsonian National Museum of the American Indian
Nation-specific education developed with Native communities; use it for cultural context rather than treating all Indigenous peoples as one tradition.
Open resource ↗Royal Botanic Gardens, Kew
Research botanical names, distribution, synonyms, descriptive records and photographs for global plant species. A taxonomic reference, not an edibility guarantee.
Open resource ↗USDA Agricultural Research Service
Understand and access Foundation Foods, SR Legacy and other USDA datasets. Nutrient values vary by food form, analytical method and database type.
Open resource ↗A free, mobile-first field reference for learning wild plants and fungi through identification, food, nutrition, documented traditional knowledge, history, modern research and safety.
Never eat, drink, or medicinally use a wild plant or fungus based solely on this app. Positive identification requires multiple diagnostic features, and edible organisms can have dangerous or deadly look-alikes.
Every dossier now follows the same evidence rules. Traditional or historical use does not establish clinical effectiveness, missing nutrition data is not guessed, and herbs can interact with medicines.
Harvest only where permitted. Take only what you need. Protect populations and habitat, leave enough for wildlife and regeneration, and avoid creating waste while gathering or preparing food and medicine.
Urban Forager helps you learn what the land can provide. Zerra continues that relationship by helping reduce waste and build more sustainable everyday habits.
Explore Zerra ↗Urban Forager applies one evidence standard across all 174 current dossiers and future additions. Claims are retained only when supported, explicitly qualified, or clearly labeled as historical/traditional documentation.
Urban Forager is a starting point, not the end of the trail. Use the Resources Library for videos, databases, safety references, ethnobotany collections and food-composition data.
Choose your dossiers and what information to include.
Use your browser's printer dialog and choose Save as PDF to create a PDF. Full-library printing can produce many pages.