American Witch-hazel

Pollinator Value

🔑 Keystone: Hamamelis supports 63 lepidoptera species as a caterpillar host plant, making it a keystone genus for regional biodiversity. Notable associates include Polyphemus moth (Antheraea polyphemus) and Hickory Tussock Moth (Lophocampa caryae). As the sole native species in its genus in eastern North America, it provides irreplaceable late-season foliage for larval development.
S13 63 species; S14 57 host records
🐛 Larval Host: Scopula limboundata, Orgyia definita, Acronicta funeralis, Euclea delphinii, Lophocampa caryae, Antheraea polyphemus, Orgyia leucostigma, Drasteria grandirena, Pyreferra hesperidago, Nola triquetrana
S13+S15 10 verified Eastern NA
❄️ Winter Food Source: Seeds are eaten by Ruffed Grouse (5.3% of diet by weight), Northern Cardinal, Bobwhite Quail, Wild Turkey, and Ring-necked Pheasant. Fox Squirrel also feeds on the seeds. Mature capsules explosively eject seeds in autumn; persistent capsules and fallen seeds provide a modest winter food resource.
S57 Ruffed Grouse; S10 Northern Cardinal, Bobwhite Quail, Wild Turkey, Ring-necked Pheasant, Fox Squirrel

Ecology & Conservation

Proximity Score: 0
Native Status: ✅ Outaouais ✅ Ottawa ✅ QC ✅ ON
Closest Direction: Local
CEC Eco-Regions: 5 – Northern Forests, 5.2 – Mixed Wood Shield, 5.2.3 – Algonquin/Southern Laurentians
Rarity Notes: Globally secure (G5) and nationally secure in Canada (N5). Ranked S4 (Apparently Secure) in Ontario but S3 (Vulnerable) in Quebec, where it approaches the northern limit of its range. Not listed under SARA or COSEWIC. Listed as Rare in the 1978 Gillett & White Quebec-side flora of the Ottawa region, with only old records from Café du diable.
S22 G5, N5, S4 ON, S3 QC; S26 not SARA listed; S63 Rare, old records
Rarity Ranks: QC S3 – Vulnerable, ON S4 – Apparently Secure
Migration: Stable
Ecological Context: American witch-hazel is a characteristic understory shrub of mesic to dry deciduous forests across eastern North America. It favors well-drained, acidic soils on rocky slopes, stream banks, and forested talus. In the Outaouais, it occurs in mixed hardwood forests alongside sugar maple, beech, and oaks, often on north-facing slopes or ravine edges. Its tolerance of deep shade allows persistence beneath closed canopies, though flowering is enhanced with greater light. Ranked S3 (Vulnerable) in Quebec, it is at the northern edge of consistent abundance.
S10 mesic conditions, sandy/loamy soil; S61 forests, floodplains, swamps, rocky slopes; S7 oak-hickory, sandy forests; S22 S3 QC

Permaculture & Companion Planting

Roles: Fire Retardant, Fortress/Barrier, Insectary Plant, Pollinator Attractor
S73/S29/S72 Evidence: Fire Retardant: S73 [MEDIUM]: S11 Fire Tolerance = High (not definitional)] | Fortress/Barrier: S61 keyword match: thorns? (supporting signal only)] | Insectary Plant: S64 NPPBI 'beneficial insects' flag] | Pollinator Attractor: S73 [HIGH]: S64 Xerces listed (source-classified)]
Notes: Suited to woodland garden edges and dappled shade plantings. Its late-season bloom (Sep-Nov) fills a critical pollinator gap when few other woody plants flower. Tolerates understory conditions beneath oaks, maples, and beeches. Dense branching provides wildlife cover year-round. No specific companion pairings documented in available guild references.
S29 woodland garden sunny edge, dappled shade; S72 not listed; S10 faunal associations

Medicinal Properties
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Category: Analgesic, Astringent, Antidiarrheal, Cold Remedy, Dermatological Aid, Febrifuge, Gynecological Aid, Haemostatic, Sedative, Tonic
S28 Cherokee, Chippewa, Iroquois uses; S29 PFAF medicinal rating 5/5
Notes: One of the most widely used medicinal plants in North America. Cherokee used bark infusions for pain, colds, sore throat, and fever. Iroquois employed it extensively for dysentery, kidney regulation, lung troubles, and postpartum hemorrhage. Chippewa used inner bark for skin troubles and as an emetic. The bark and leaves are rich in tannins (especially hamamelitannin and gallic acid) that provide astringent and haemostatic properties. Commercial witch-hazel water is a steam distillate used in eye drops, skin creams, and after-shave lotions.
S28 39 ethnobotanical uses across Cherokee, Chippewa, Iroquois; S29 astringent, haemostatic; S31 gallic acid, hamamelitannin

Edibility & Foraging
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✅ Edible

Foraging Notes

Cherokee used leaves and twigs to make tea. Seeds are reportedly edible raw or cooked with an oily texture, but PFAF notes the edibility reports stem from a single questionable historical source. Seeds are very small (barley-grain sized) with a thick bony coat, making them impractical as a food source.

S28 Cherokee Food: leaves/twigs for tea; S29 edibility rating 1/5, seed reports questionable

Toxicity

△ Low Toxicity

Not listed in Cornell poisonous plants database and USDA rates toxicity as None. However, PFAF notes that long-term internal use should be avoided due to cancer risk from high tannin content. Ingestion of 1g can cause vomiting, nausea, and impaction. Topical use may cause contact dermatitis in sensitive individuals. Avoid during pregnancy and breastfeeding.

S38 not listed; S11 Toxicity=None; S29 Known Hazards: high tannin, vomiting, dermatitis

Seed Source