Groundnut
Apios americana
A herbaceous, tuberous perennial vine of eastern North America that twines 8-16 feet up surrounding vegetation through moist thickets, bottomlands, marsh and streambank edges. From mid-summer into fall it carries fragrant, maroon-to-reddish-brown pea-like flowers in compact racemes from the leaf axils, followed by edible seeds; the underground tubers are an edible, protein-rich staple long gathered as Indian potato. A native legume and a documented larval host for the Silver-spotted Skipper, it spreads vigorously by seed and tubers.
Native: 39 US states + 5 CA provinces
Climate fit: broad (82/100)
Pollinator
Edible
Structure
Light
Full sun / Part sun / Part shade
Water
Consistent moisture
Mature size
96-192" tall · 24" apart
Hardy in zones
4a-9b
very cold to frosty winters
AHS heat range
1-9
Plant range authored in AHS heat-zone terms.
Native in Illinois
Yes
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A documented larval host for the Skipper butterflies and 1 other species — caterpillars feed on its foliage before becoming the next generation.
Cold hardiness
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✓
Well-suited today and still thriving in 2050.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...
Where this plant fits
Suitable across 41 ecoregions — 40 climate-resilient through 2070 · 1 suited today. Best matches first.
Appalachian mixed mesophytic forests
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Appalachian-Blue Ridge forests
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Arizona Mountains forests
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Atlantic coastal pine barrens
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Blue Mountains forests
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Canadian Aspen forests and parklands
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Central Pacific Northwest coastal forests
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Central Tallgrass prairie
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Central-Southern Cascades Forests
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Chilean Matorral
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Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Helianthus tuberosus
Sunchoke
A tall, tuber-forming perennial sunflower native to eastern North America — also called Jerusalem artichoke or sunroot — grown both for its 2-4 inch bright-yellow late-summer sunflowers and its knobby edible underground tubers. Rough-hairy stems rise 6-10 feet bearing ovate, serrate leaves on winged petioles. It spreads aggressively by rhizome and self-seeding to form colonies; Missouri Botanical Garden flatly calls it "weedy and invasive" and difficult to remove once planted.
Corylus americana
American hazelnut
A rounded, multi-stemmed deciduous shrub native across eastern and central North America, grown for its edible nuts and its season-opening catkins. Showy 2-3 inch yellowish-brown male catkins dangle from bare branches in early spring before the ovate, double-toothed leaves emerge; small egg-shaped edible nuts ripen inside leafy husks by mid- to late summer. Easygoing in average soil and tolerant of clay and black walnut, it suckers into thickets that screen and shelter wildlife.
Diospyros virginiana
American persimmon
A tough, medium-sized native tree of the eastern and midwestern United States, grown as much for its showy edible orange fruit as for its distinctive thick, dark gray bark broken into rectangular blocks. Small urn-shaped white-to-greenish-yellow flowers open in May and June, and the sweet fruit ripens after frost. Largely dioecious — a female tree needs a male pollinizer nearby to set fruit — and notably drought- and walnut-tolerant once established.
Amelanchier canadensis
Canadian serviceberry
A small native tree with white spring flowers, edible summer berries, and copper to red fall color.
Prunus virginiana
Chokecherry
A suckering, thicket-forming native cherry that reads as a large shrub or small tree across most of North America. Fragrant white flowers open in elongated drooping racemes in spring, followed by dense pendulous clusters of pea-sized cherries that ripen red to dark purple-black in late summer. The astringent fruit is technically edible after processing, and the plant is a workhorse for wildlife — feeding birds and mammals and hosting sphinx-moth larvae.
Sambucus canadensis
American elderberry
A fast, suckering native shrub of streambanks and moist thickets across eastern North America, grown for huge flat-topped cymes of tiny lemon-scented white flowers in early summer and the clusters of dark elderberry drupes that follow. Spreads by root suckers into naturalized colonies 5-12 feet tall and wide; the flowers feed butterflies and the showy fruit feeds birds. The raw berries are not eaten fresh — they are cooked into jelly, pie, and wine.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Groundnut (Apios americana). Retrieved 2026, June 24, from https://plotwright.com/plants/apios-americana
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
Missouri Botanical Garden PlantFinder
Botanical research database
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database