
Photo by Public domain (iNaturalist) on iNaturalist · CC0 (public domain)
Podophyllum peltatum
This one has a dangerous look-alike
Nothing else in these woods makes an umbrella leaf — the danger is the plant itself. A green, hard fruit, the rind, the seeds, the leaves and the roots all contain podophyllotoxin and are poisonous; so is an unripe fruit a child picks because it looks like a small green apple. Fully ripe means yellow, soft, fragrant, usually fallen.
Only when fully ripe — soft, yellow, fragrant and usually fallen — and only the flesh, with the seeds and skin strained out. Ripe mayapple tastes of lemon and tropical fruit and is used for jelly, juice and a spoonful eaten fresh. Every other part of the plant, and any fruit still green or firm, contains podophyllotoxin and is poisonous.
Everything except the flesh of the ripe fruit: the leaves, stems, rhizome and roots, the seeds, the rind, and unripe fruit. The poison is podophyllotoxin, which causes severe vomiting and diarrhea and can injure the liver, kidneys and nerves. Touching the root can also inflame the skin. Eating too many ripe fruit gives some people diarrhea.
Late July and August in southern Ontario, Quebec, New York and the Great Lakes states; late June and July from Missouri south; into early September in Minnesota. Do not go by the calendar — a ripe fruit is yellow with no green left, soft enough to dent, smells sweet from a step away, and drops into your hand. If you have to tug, leave it.
By colonies of knee-high umbrella leaves, each 20–40 cm (8–16 in) across and cut into five to nine deep lobes, one leaf per stalk on the young plants and two on the mature ones. A single nodding white flower 3–5 cm (1–2 in) across opens in the fork of the two-leaved plants in May, hidden under the leaves, and becomes an egg-shaped fruit 3–5 cm (1½–2 in) long. No other common eastern wildflower makes an umbrella leaf on one stalk; the look-alikes below are the few that come close.
Yes, and this is the plant to teach. Mayapple grows in parks, school woodlots and backyards, and its green summer fruit looks like a small apple or lime — a child who eats one unripe, or chews the leaves, can be seriously poisoned. The rule for kids is simple: never a green one, never off the plant, and nothing from this plant at all without an adult who knows it. If a child has eaten any part, call poison control.
Yes — leaves, roots and unripe fruit poison dogs as they do people, and a dog that digs up and chews a rhizome can become very ill with vomiting and diarrhea. Keep dogs from chewing in a mayapple colony and call a vet if one has.
Eastern box turtles above all, which find the fallen fruit by smell and spread the seed through their droppings; raccoons, opossums and some birds take it too. A fallen fruit you leave behind is a turtle’s meal and a colony’s only way of travelling, so take a few and leave most.
Found in these regions
Hardiness zones 3–8.
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Diospyros virginiana
Blocky alligator-hide bark; orange fruit the size of a plum, only ripe when it is wrinkled, squishy and usually on the ground.
How to know it & its look-alikes →Photo: Katja Schulz · CC BY 4.0

Elaeagnus umbellata
A sprawling thorny shrub whose leaves flash silver underneath; in autumn it is weighed down with small red berries finely speckled with silver and brown scales, each with one soft seed.
How to know it & its look-alikes →
Fagus grandifolia
Smooth, pale grey bark on a tall tree; long, sharp, cigar-shaped buds; oval leaves with coarse teeth and straight parallel veins, many held, bleached, through winter. The nuts are small, three-sided and come two to a soft-bristled husk that splits into four.
How to know it & its look-alikes →Checked against these sources ·
Seasons are typical for the middle of the range and move by weeks north and south, and up and down hills.
Educational information only. Never eat a wild plant or mushroom identified from a single photograph or description — confirm with a regional field guide or an experienced forager, and know the poisonous species in your area first.