SEEDS $100+ SHIP FREE
Conopholis americana

Bear Corn

$3.50

Packet
$3.50

NEW! Bear Corn is an anomaly in the plant world.  This parasitic species spends the first few years of life slowly tapping into its preferred power supply: oak roots.  Once the Bear Corn roots are thoroughly entwined and encased within a nodule on the oak root, it can siphon and store enough energy to flower.  The pale yellow structure emerges in spring and could easily be mistaken for a fungus.  As the inflorescence ripens, tawny scales develop and darken, replicating a pinecone-like form for a brief time before opening further to highlight the tubular cream-colored blossoms as they elongate.  The blooms self-pollinate and balloon into rounded fruits that could look like swollen corn kernels.

Conopholis americana does not photosynthesize, so it will grow well in all sun or shade conditions.  Because Bear Corn is reliant on its woody host, though, it is usually found in shaded sites.  This species shows a strong preference for the Quercus genus; some sources list Red Oak, specifically, as the ideal host.  Beech and American Chestnut are sometimes mentioned as alternative host tree species if oaks are not present.  Because Bear Corn is strictly parasitic, it will not survive a transplant.  The best way to encourage this species in a new site is to sow the seed under an oak canopy in the fall; remove heavy leaf litter for best results.  Once established, Bear Corn will reseed itself.  

Where their ranges overlap, Black Bears will seek out and consume the fruiting structures as they come out of hibernation.  Coyotes, Racoons, and Deer may also browse these plants, helping to distribute the seed across the forested area.  

Also commonly called American Cancer Root, Cancer Corn, Bear Cone, Squawroot, and Bumeh.

Conopholis americana - Bear Corn

Map Key

Present in state
Present but introduced in county
Present and native in county; not rare
Not present in state
Present and native in county; rare
Species extirpated (historic)
State or county listed as noxious
Present in state; exotic

This map shows the native and introduced (adventive) range of this species. Given appropriate habitat and climate, native plants can be grown outside their range.

Be the first to ask a question.

Seed

Growing your own plants from seed is the most economical way to add natives to your home. Before you get started, one of the most important things to know about the seeds of wild plants is that many have built-in dormancy mechanisms that prevent the seed from germinating. In nature, this prevents a population of plants from germinating all at once, before killing frosts, or in times of drought. To propagate native plants, a gardener must break this dormancy before seed will grow.

Each species is different, so be sure to check the GERMINATION CODE listed on the website, in the catalog, or on your seed packet. Then, follow the GERMINATION INSTRUCTIONS prior to planting. Some species don't need any pre-treatment to germinate, but some species have dormancy mechanisms that must be broken before the seed will germinate. Some dormancy can be broken in a few minutes, but some species take months or even years.

Seed dormancy can be broken artificially by prolonged refrigeration of damp seed in the process of cold/moist STRATIFICATION. A less complicated approach is to let nature handle the stratifying through a dormant seeding, sowing seeds on the surface of a weed-free site in late fall or winter. Tucked safely beneath the snow, seeds will be conditioned by weathering to make germination possible in subsequent growing seasons.

To learn more, please visit: How to Germinate Native Seeds

Dormant Bare Root Plants

We dig plants when they are dormant from our outdoor beds and ship them April-May and October. Some species go dormant in the summer and we can ship them July/August. We are among the few still employing this production method, which is labor intensive but plant-friendly. They arrive to you dormant, with little to no top-growth (bare-root), packed in peat moss. They should be planted as soon as possible. Unlike greenhouse-grown plants, bare-root plants can be planted during cold weather or anytime the soil is not frozen. A root photo is included with each species to illustrate the optimal depth and orientation. Planting instructions/care are also included with each order.

Download: Installing Your Bare-Root Plants

Potted Plants

3-packs and trays of 32, 38, or 50 plants leave our Midwest greenhouses based on species readiness (being well-rooted for transit) and order date; Spring shipping is typically early May through June, and Fall shipping is mid-August through September. Plants shipped in spring may be overwintered and still emerging from dormancy. Potted plants are typically 4-9 months old when they ship. Plant tray cells are approximately 2” wide x 5” deep in the trays of 38 and 50, and 2.5" wide x 3.5" deep in the 3-packs and trays of 32; ideal for deep-rooted natives. Full-color tags and planting & care instructions are included with each order.

Download: Planting and Care of Potted Plants

*PLEASE NOTE: we are a mail order nursery and have no retail facilities, but you may pick up your order if prior arrangements are made. Pick up orders are subject to **MN Sales Tax.

US Shipping & Handling Charges

SEED: $100.00 and under: $5.00
Retail online SEED orders over $100.00 ship free!
Custom seed mixes or discounted seed sales over $100, add 5% of the total seed cost.

BARE ROOT and POTTED PLANTS: $50.00 and under: $9.00
over $50.00: 18% of the total plant cost.

TOOLS and BOOKS: ship free! (within the contiguous US). APPAREL: shipping fees are determined by Bonfire.

**We are required to collect state sales tax in certain states. Your state's eligibility and % will be calculated at checkout. MN State Sales Tax of 7.375% is applied for orders picked up at our MN location. Shipping & handling charges are also subject to the sales tax.

Shipping Season

SEED, TOOLS and BOOKS are sent year-round. Most orders ship within 1-3 business days.

BARE ROOT PLANTS are shipped during optimal transplanting time: Spring (April-May) and Fall (Oct). Some ephemeral species are also available for summer shipping. Since our plants are field-grown, Nature sets the schedule each year as to when our season will begin and end. We fill all orders, on a first-come, first-serve basis, to the best of our ability depending on weather conditions beyond our control.

POTTED PLANTS (Trays of 32/38/50 plugs and 3-packs) typically begin shipping late April and go into June; shipping time is heavily dependent on all the species in your order being well-rooted. If winter-spring greenhouse growing conditions are favorable and all species are well-rooted at once, then we ship by order date (first come, first serve). We are a Midwest greenhouse, and due to the challenges of getting all the species in the Mix & Match and Pre-Designed Garden Kits transit-ready at the same time, we typically can't ship before early May. Early shipment requests will be considered on a case-by-case basis.

*We are unable to ship PLANTS (bare root or potted) outside the contiguous US or to CALIFORNIA due to regulations.

Packing

SEED is packaged in paper envelopes for small quanties, and plastic bags for large quantities. If multiple bulk qtys of seed are ordered of the same species, we pack them as one. i.e. two 1/8 oz is packed in one 1/4 oz envelope. Small qtys of seed are sent in paper padded mailers to protect the seed from being crushed during transit.

BARE ROOT PLANTS are packed in slightly moist peat moss and bagged by species. Depending on order size, we pack in paper padded mailers and cardboard boxes. We use compostable packing peanuts to help protect bare root orders; these are cornstarch-based and can be dissolved in water.

POTTED PLANTS are grown and shipped in plastic pots and trays. We pack in cardboard boxes and inserts.

Delivery

We ship using USPS, UPS and Spee Dee. UPS and Spee Dee are often used for expediting plant orders; they will not deliver to Post Office Box numbers, so please also include your street address if ordering plants. We send tracking numbers to your email address so please use a valid email address that you check regularily when you order.

FOR MORE DETAILED SHIPPING INFORMATION, INCLUDING CANADA SHIPPING RATES (SEED ONLY), PLEASE SEE 'SHIPPING' AT THE FOOTER OF THIS WEBSITE.

Details

Seeds/Packet
500
Seeds/Ounce
157,000
Germination Code
?
Life Cycle
Perennial
Sun Exposure
Partial, Shade
Soil Moisture
Medium, Medium-Dry
Height
8 inches
Bloom Time
May, June, July
Bloom Color
Cream
USDA Zones
3-9
Catalog Code
CON02F