Eastern White Pine

Pollinator Value

🔑 Keystone: Pinus supports 232 species of butterflies and moths as a caterpillar host plant in eastern North America, making it a keystone genus for lepidopteran biodiversity. Key associates include pine-specialist moths such as Panthea furcilla alongside generalist species like Actias luna and Papilio glaucus. The genus also provides critical seed resources for Red Crossbills and other granivorous birds, and its evergreen canopy offers year-round nesting and roosting habitat.
S13 232 lepidoptera; S57 Red Crossbill; S10 bird nesting/cover
🐛 Larval Host: Panthea furcilla, Cupido comyntas, Glaucopsyche lygdamus, Colias philodice, Amorpha juglandis, Limenitis arthemis, Papilio glaucus, Acronicta funeralis, Callosamia promethea, Campaea perlata, Paonias excaecatus, Actias luna, Euclea delphinii, Lophocampa caryae, Schizura concinna
S13+S15 15 verified Eastern NA
🐝 Specialist Bee Host: S17 matching lines are false positives (genus 'Pinus' matched within 'Lupinus'); no confirmed specialist bees for Pinus
❄️ Winter Food Source: Red Crossbill (Loxia curvirostra) feeds heavily on white pine seeds, with Pinus strobus comprising 82% of its diet in occurrence studies. Seeds persist on the tree through fall into winter. The persistent cones and retained seeds also attract Pine Siskins, Black-capped Chickadees, and White-breasted Nuthatches through the winter months.
S57 Red Crossbill 82% diet occurrence; S10 seed-eating birds; S11 Fruit/Seed Persistence=Yes

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: Secure throughout its range in both Ontario (S5) and Quebec (S5), with a global rank of G5. Not listed under SARA or COSEWIC. Nationally ranked N5 in Canada and N5 in the United States. Common in the Ottawa-Hull region historically and at present.
S22 G5, N5 CA, N5 US; S26 not SARA listed; S63 Common in Ottawa-Hull
Rarity Ranks: QC S5 – Secure, ON S5 – Secure
Migration: Stable
Ecological Context: Eastern white pine is a dominant canopy tree of the hemlock-white pine-northern hardwoods forest type across the Mixed Wood Shield. In the Outaouais, it occurs on mesic to dry upland sites on sandy or loamy soils, rocky stream banks, and north-facing slopes. Herbarium specimens from the Gatineau region document it in red oak-yellow birch-white pine associations on thin-soiled rocky hilltops. It sometimes forms extensive pure stands but more typically grows in mixed forest with red pine, hemlock, sugar maple, and yellow birch.
S7 hemlock-white pine-northern hardwoods forest; S10 upland mesic to dry-mesic sites; S48 Gatineau specimens in oak-birch-pine associations; S4 upland mesic sand or loam, north slopes, rocky stream banks

Roles: Fortress/Barrier, Pollinator Attractor, Wildlife Habitat
S73/S29/S72 Evidence: Fortress/Barrier: S10 keyword match: prickl (supporting signal only); S61 keyword match: spines? (supporting signal only)] | Pollinator Attractor: S73 [MEDIUM]: S68 5 bee associations (threshold=3)] | Wildlife Habitat: S72 Hemenway (tables: 7-2, pp. 116)]
Notes: Serves as a canopy-layer anchor in woodland garden guilds, providing year-round wind protection, wildlife habitat, and nest sites. Listed by Hemenway as a wildlife habitat tree offering seed, shelter, and nesting services for birds. Its rapid growth and tall form create sheltered understory conditions suited to shade-tolerant hardwoods and shrubs. Leaf secretions contain terpenes that inhibit germination of some plants beneath the canopy, which should be considered in guild design.
S72 Hemenway Table 7-2: wildlife habitat, bird services Sd/Sh/Ns; S29 leaf terpenes inhibit germination; S10 cover and nesting for warblers and other birds

Category: Antiseptic, Demulcent, Diuretic, Expectorant, Pectoral, Analgesic, Dermatological Aid, Cold Remedy, Antirheumatic
S28 Moerman Drug categories; S29 PFAF medicinal uses
Notes: Extensively used by Indigenous peoples across eastern North America, with 56 documented medicinal and drug uses in Moerman. The Iroquois used bark decoctions for rheumatism, skin eruptions, and colds. The Algonquin Tete-de-Boule applied inner bark poultices to the chest for strong colds. Delaware used pitch poultices to draw toxins from boils. The dried inner bark is demulcent, diuretic, and expectorant, and remains an ingredient in commercial cough syrups. Needle tea provides vitamin C and was used to treat sore throats and scurvy. Health Canada lists Pinus strobus as an approved herbal ingredient (NHPID).
S28 56 Moerman Medicine+Drug uses across Iroquois, Algonquin, Delaware, Cherokee; S29 PFAF medicinal; S36 Health Canada NHPID approved

❌ Not Edible

Foraging Notes: While not commonly eaten, various parts have historical and Indigenous food uses. Fresh needles can be brewed into an aromatic tea rich in vitamins A and C. Seeds are edible raw or cooked but are small (6 mm). Inner bark was dried, ground, and used as a flour extender or soup thickener by Indigenous peoples. Tender new shoots can be boiled in syrup to make candy. The sticky resin was chewed as a gum.
S29 Edible Parts: Flowers, Inner bark, Seed, Shoots; tea from needles rich in vitamins A and C; S11 Palatable Human=No