// SPECIES PROFILE · PERENNIAL · NATIVE · SPRING EPHEMERAL

Mayapple

Podophyllum peltatum

A clonal woodland perennial that emerges in late March in the Tulsa region as tightly furled umbrellas pushing through last year's oak leaves, then unfolds into knee-high colonies of glossy, deeply lobed parasol-leaves across the floor of moist deciduous woods. A single waxy white flower — cleistogamous to the casual observer because it nods beneath the paired leaves — matures into a lemon-yellow fleshy berry by July. Every part of the plant except that fully ripe yellow fruit is toxic, and the rhizome's lignans (podophyllotoxin) are the source-molecule of the modern chemotherapy drugs etoposide and teniposide.

// QUICK FACTS

Family: Berberidaceae (barberry family)
Group: Herbaceous perennial · clonal rhizome
Native range: E North America: Quebec → N Florida, west to E Texas & SE Kansas
NE Oklahoma status: Native · common in Ozark & Ouachita woods, scattered in eastern Cross Timbers
USDA hardiness: Zones 3–8 (Tulsa = 7a/7b)
Mature size: 12–18 in tall · colony spreads indefinitely by rhizome
Sun: Part to full shade; tolerates spring sun before canopy closes
Soil: Moist, humus-rich, slightly acidic to neutral; loamy woodland duff
Water: Average to moist; goes summer-dormant if too dry
Bloom: April–May; single nodding flower hidden under leaves on 2-leaved stems only
Fruit ripe: July–August; lemon-yellow, ~2 in, soft when ripe
Wildlife value: Box turtle is the primary seed disperser; bumblebees pollinate
Ecological role: Spring ephemeral · woodland groundcover · pharmacy plant
Toxicity: Toxic — rhizome, foliage, roots, unripe fruit, seeds

Mayapple (Podophyllum peltatum) — colony of umbrella-leaves on a shaded woodland floor — *Podophyllum peltatum* — the unmistakable umbrella-leaf canopy of an established mayapple colony. Photo via Wikipedia / Wikimedia Commons.

Identification

[ field key — umbrella leaf · 1-leaf vs 2-leaf stems · hidden flower · yellow berry ]

Habit & emergence

Mayapple is a clonal rhizomatous perennial that forms dense colonies (often a single genetic individual covering many square meters) on the floor of moist deciduous woodland. Each spring the horizontal rhizome sends up unbranched aerial stems that emerge tightly furled like a closed umbrella, then unfold to full size in 7–14 days. By mid-summer the entire above-ground plant senesces and disappears — a true spring ephemeral that completes its photosynthetic year before the oak canopy fully closes.

One-leaf vs two-leaf stems

The single most useful field character: only stems with two leaves flower and fruit. One-leaf stems are vegetative juveniles or sterile ramets — their solitary peltate leaf sits atop the stem like a flat parasol. Two-leaf stems carry their pair of leaves on a forked petiole, and the single nodding flower (and later the fruit) hangs in the axil between the two leaf petioles, completely concealed from above. Looking down at a colony you would never know it was in bloom; you must crouch and lift the leaves.

Flower & fruit

The flower is a single, nodding, waxy-white, six- to nine-petaled bloom 1–2 in across, with a faintly fragrant heavy scent of overripe melon. It opens in April–May and is pollinated by bumblebees (and occasionally other large bees) which buzz the pollen loose. The fruit ripens July–August into a soft, lemon-yellow ellipsoidal berry roughly 2 in long that smells of sweet tropical custard when fully ripe and falls from the plant. Green or pale-yellow underripe fruit is bitter and toxic; only the soft, fully yellow, slightly wrinkled fruit is edible.

Confusables

Almost nothing else in NE Oklahoma woodlands looks like a mayapple colony. Young Sanguinaria canadensis (bloodroot) leaves can be mistaken for solitary mayapple seedlings but bloodroot leaves wrap a single flower stalk and have heavily lobed margins. Umbrella magnolia (Magnolia tripetala, rare in our region) has leaves that resemble mayapple in arrangement but is a tree. The Asian P. pleianthum and P. delavayi sold as horticultural "Asian mayapples" have mottled leaves and clustered red flowers held above the foliage — not native, and rarely planted here.

Habitat & Range in NE Oklahoma

Podophyllum peltatum reaches the western edge of its core range in eastern Oklahoma. It is genuinely common in the cooler, moister, more mesic-soiled woodlands of the Ozark Plateau — Cherokee, Adair, Delaware, Mayes and Sequoyah counties — where you find sweeping colonies on north-facing slopes, in shaded ravines, along the moist toe-slopes of bluffs, and on alluvial terraces above clear streams. It also persists scattered through the eastern Ouachita drainages of LeFlore and Pushmataha counties. Westward into the Cross Timbers around Tulsa it becomes patchy and is largely confined to the most sheltered ravines and riparian corridors of the Verdigris, Caney and Arkansas drainages, where mesic micro-sites mimic Ozark conditions.

Soil preferences are clear: deep, friable, humus-rich loam, slightly acidic to neutral, with reliable spring moisture and good drainage. Mayapple does not tolerate the dry, shallow, droughty sandstone ridges that dominate much of the Cross Timbers, and it disappears entirely from the tallgrass prairie of Osage County. It is an indicator species of old-growth or recovering deciduous forest — persistent colonies generally signal a site that has remained wooded for many decades, since sexual reproduction from seed is slow and rhizome spread is the dominant mode of colony expansion.

Historical fire regime in mayapple habitat was infrequent and patchy. Hardwood-bottom and north-slope mesic forests in the Ozarks burned far less often than the surrounding Cross Timbers oak woodland; mayapple's summer dormancy means it tolerates low-intensity dormant-season fire, but its colonies are damaged by repeated growing-season burns or by mechanical disturbance such as logging skid trails or feral-hog rooting (an emerging threat across eastern Oklahoma).

Ecology & Wildlife Value

[ pollination · box-turtle dispersal · clonal reproduction · podophyllotoxin · deer resistance ]

Pollination

Pollination is performed almost exclusively by queen bumblebees (Bombus spp.) early in the season when the colony blooms. The flower offers no nectar and rewards only with pollen, so visitation is incidental and fruit set is famously low — often well under 10% of two-leaf stems set fruit in a given year. Cross-pollination between genetically distinct clones is required for good seed set; isolated single-clone colonies can flower abundantly and set almost no fruit at all.

Box turtle — the seed disperser

The signature dispersal relationship is with the eastern box turtle (Terrapene carolina) and to a lesser extent the three-toed box turtle (T. carolina triunguis) of NE Oklahoma. Box turtles seek out fallen ripe mayapples, swallow them whole, and pass the seeds intact some distance away. Germination rates after gut passage are dramatically higher than for surface-sown seed, and box turtles appear to be effectively the only vertebrate that routinely disperses mayapple seed in our region. Conservation of mayapple colonies and conservation of box-turtle populations are functionally the same problem.

Clonal reproduction

Most mayapple "spread" is not from seed at all but from creeping rhizome growth, typically a few inches per year, branching laterally to produce an ever-widening clonal patch. A single rhizome system can persist for many decades and cover hundreds of square feet. This is why disturbing a colony rarely eliminates it — rhizome fragments left in the soil resprout — but also why it is hard to establish mayapple from seed in a garden setting.

Mammalian herbivory & toxicity

Mayapple foliage and rhizome contain podophyllotoxin and related aryltetralin lignans — potent cytotoxic compounds that inhibit microtubule assembly and protein synthesis. The result: deer, rabbits and most other mammalian browsers leave mayapple almost entirely alone, making it one of the most reliably deer-resistant woodland natives for unfenced properties in the Tulsa region. Box turtles are tolerant only of the ripe fleshy fruit pulp; the seeds themselves remain toxic.

Toxicity — be specific about what is safe: Only the fully ripe, soft, lemon-yellow, fragrant mayapple fruit is edible, and even then it should be eaten in moderation and the seeds spat out. All other parts — the rhizome, roots, leaves, stems, unripe green or pale fruit, and the seeds inside the ripe fruit — are toxic and contain podophyllotoxin. Ingestion of foliage or rhizome causes severe gastroenteritis, vomiting, and can be fatal at sufficient dose. Do not let small children, dogs, or livestock browse the plants. Do not attempt home-distillation or self-prescription of any "wild mandrake" preparation.

Pharmaceutical importance: Podophyllotoxin extracted from mayapple rhizome is the molecular precursor to etoposide (VP-16) and teniposide, semi-synthetic chemotherapy drugs in the WHO List of Essential Medicines used to treat lung cancer, lymphoma, leukemia and testicular cancer. Most current commercial podophyllotoxin is now sourced from the Himalayan congener Sinopodophyllum hexandrum due to higher yields, but P. peltatum was the original North American source and remains a backup. This is one of the most consequential plant-to-drug translations of the 20th century, and it began with traditional uses documented from the Cherokee, Penobscot, Iroquois and others.

Horticulture & Care

[ siting · planting · establishment · companions · maintenance · propagation ]

When to plant intentionally

Mayapple is one of the finest native woodland groundcovers for shaded NE Oklahoma yards that can supply consistent spring moisture. Use it to carpet the floor of an oak or hickory canopy, to soften the foot of a north-facing wall or fence, to underplant a shaded foundation bed where lawn refuses to grow, and to establish a low-maintenance native understory in a Tulsa-area woodland-restoration project. It pairs beautifully with other spring ephemerals (bloodroot, Virginia bluebells, Dutchman's breeches, trout lily) that share its early-season window.

Planting & establishment

Season: plant dormant rhizome divisions in fall (October–November) or just as shoots emerge in early spring (March). Avoid summer planting — the plant is dormant and will rot.
Sun: dappled to full shade; spring sun is acceptable because the plant has senesced before midsummer heat.
Soil: rich, friable loam with high humus content. Amend heavy clay with leaf mold or composted hardwood bark; do not plant in straight clay or compacted urban subsoil.
Hole: shallow trench just deep enough to lay the rhizome horizontally 1–2 in below the surface, with the dormant terminal bud pointed slightly up. Cover lightly and mulch with shredded leaves.
Spacing: 12–18 in for a colony that will close in 3–5 years; further apart for naturalistic drift plantings.
Water: consistent spring moisture is essential during establishment. Once established, mayapple tolerates summer drought by going dormant early — this is normal, not a failure.
Mulch: 1–2 in of shredded oak leaves replenished annually. Do not use dyed bark mulch or cypress mulch — mayapple evolved with hardwood leaf litter and prefers it.

Pests & diseases

Mayapple rust (Allodus podophylli, formerly Puccinia podophylli) — bright orange spots on the undersides of leaves; cosmetic in most years and rarely fatal. Increases in damp shaded plantings with poor air circulation.
Slugs & snails can chew young emerging shoots in wet springs.
Feral hogs — the most serious modern threat to wild mayapple colonies in eastern Oklahoma. Hog rooting destroys rhizome systems wholesale and is now a documented driver of mayapple decline in the Ozarks.
Deer browse — rare, due to podophyllotoxin toxicity. Mayapple is one of the most reliably deer-proof natives in the region.
Drought-induced early dormancy — not a disease but often mistaken for one. If your colony goes brown and disappears in late June it is likely just summer-dormant; it will return next spring.

Propagation

Easiest by rhizome division in fall: lift a section of colony, cut the woody rhizome into 4–6 in segments each containing at least one terminal bud and several feeder roots, and replant. Seed propagation is possible but slow: collect ripe yellow fruit in July, clean the seed of pulp, and surface-sow immediately into a shaded outdoor seed flat — seed requires both warm-moist and cold-moist stratification and may take two full years to germinate. Seedlings produce a single cotyledonary leaf the first year and one true leaf the second year, and do not flower until year 4–6 at the earliest.

Sourcing

Buy nursery-propagated rhizome divisions only — do not dig from the wild. Wild colonies in the Ozarks have been measurably depleted by both pharmaceutical collection and irresponsible gardening traffic. Reputable native-plant nurseries in Oklahoma, Missouri and Arkansas, plus regional native-plant society sales, are the appropriate source. The Oklahoma Native Plant Society holds annual sales that often include mayapple.

Cultural & Material Uses

Mayapple sits in a small group of North American natives whose Indigenous medicinal uses translated directly into modern pharmacology. Its modern descendants — etoposide and teniposide — remain in clinical use today.

Indigenous medicinal use: Cherokee, Iroquois, Penobscot, Menominee and other Eastern Woodlands nations used dried, powdered mayapple rhizome historically as a strong purgative, vermifuge, and topical treatment for skin growths and warts. Use was always small-dose and carefully controlled by knowledgeable practitioners; the line between therapeutic and toxic is narrow. Documented in ethnobotanical records by Moerman and others.
19th-century U.S. pharmacopoeia: "Podophyllum resin" (an ethanol extract of the dried rhizome) was an official drug in the U.S. Pharmacopeia from 1820 well into the 20th century, used primarily as a cathartic and as a topical treatment for venereal warts. A topical podophyllin solution remained a standard wart treatment in conventional medicine into the late 20th century.
Modern chemotherapy precursor: Mid-20th-century isolation of podophyllotoxin from P. peltatum rhizome led directly to the synthesis of etoposide (VP-16) and teniposide, topoisomerase II inhibitors used to treat lung cancer (especially small-cell), testicular cancer, lymphoma and acute leukemias. Both drugs are on the WHO Model List of Essential Medicines.
Edible fruit (with strict caveats): The fully ripe yellow fruit, harvested only after it has fallen and gone soft, has been eaten fresh or made into preserves, jelly and a regional "mayapple lemonade" by Ozark and Appalachian foragers. Eat in moderation, spit the seeds, and be 100% sure the fruit is ripe (lemon-yellow, soft, fragrant, falls easily). Underripe fruit and seeds are toxic.
Topical wart treatment: The rhizome's podophyllin has a long folk history (and a documented clinical history) as a topical wart-removing agent. Modern use is by prescription; do not attempt home preparation given the toxicity of the raw plant material.
Conservation status: Not federally listed but locally depleted in parts of its range due to overcollection and habitat loss. Most U.S. states encourage cultivation rather than wild collection; most commercial podophyllotoxin is now imported from cultivated Sinopodophyllum hexandrum in the Himalaya.

Sources & Further Reading

USDA NRCS PLANTS Database — Podophyllum peltatum: plants.usda.gov/plant-profile/POPE
USDA Forest Service Fire Effects Information System (FEIS) — Podophyllum peltatum: fs.usda.gov/database/feis — podpel
Lady Bird Johnson Wildflower Center — Podophyllum peltatum: wildflower.org — POPE
Missouri Botanical Garden Plant Finder — Podophyllum peltatum cultivation profile.
Oklahoma Biological Survey — vascular plant atlas, Podophyllum peltatum county distribution records (Ozark and Ouachita counties).
Moerman, D.E., Native American Ethnobotany (Timber Press, 1998) — tribal-by-tribal documentation of Podophyllum peltatum medicinal uses.
Foster, S. & Duke, J.A., A Field Guide to Medicinal Plants and Herbs of Eastern and Central North America (Peterson Field Guides) — mayapple monograph.
Imbert, T. (1998), "Discovery of podophyllotoxins", Biochimie 80(3): 207–222 — pharmacological history.
Kang, H. et al., on box-turtle (Terrapene carolina) seed dispersal of Podophyllum peltatum — ecological literature on the turtle–mayapple mutualism.
Wikipedia — Podophyllum peltatum: en.wikipedia.org/wiki/Podophyllum_peltatum (CC BY-SA 4.0; portions of the description and pharmacology sections summarize Wikipedia content).
Oklahoma Native Plant Society — field-trip reports and woodland-wildflower lists for the Ozark Plateau.