What Is a Cone Scale? Where Conifers Hold Their Seeds
A cone scale is the part of a conifer cone that carries seeds. Utah State Extension says gymnosperm seeds form without an ovary, usually on the scales of a cone.
The short answer
A cone scale is the part of a cone where a conifer bears its seeds. Utah State says gymnosperms make seeds with no ovary, usually on cone scales. CSU Extension says these plants make no flowers. They produce seeds on modified bracts such as pine cones. Pines, firs plus spruces all bear seeds this way.
Why do seeds sit on cone scales?
CSU says gymnosperm means naked seed. No flowers form on these plants. They form seeds on the end of modified bracts. Utah State says the seeds have no ovary around them. Flowering plants wrap seeds in fruit. A conifer leaves it on the scale.
| Option | What it does | Source |
|---|---|---|
| Naked seed | No ovary | Tree and botanical glossary |
| No flowers | Seed plant without blooms | Botany (CMG GardenNotes 120) |
| Modified bract | Holds seed | Botany (CMG GardenNotes 120) |
Which plants carry seeds on cone scales?
Utah State defines a conifer as a tree or shrub that usually bears its seeds in cones. It lists pines, firs, spruces, yews plus Douglas fir. CSU says conifer refers to cone bearing. Most are narrow leaf evergreens. A few conifers, like larch plus bald cypress, shed needles each fall.
Pine: cone bearing. Spruce: cone bearing. Larch: deciduous conifer.
Does every gymnosperm have cone scales?
No. Ginkgo bears neither flowers nor fruit, per NC State. Male trees make pollen cones with sporophylls. Female trees make ovules on a stalk tip, not on a scale. Seeds form only on female trees. Utah State still lists ginkgo with conifers as a gymnosperm.
Ginkgo male: pollen cones. Ginkgo female: ovules on stalks. Gymnosperm: both groups.
Troubleshooting
Scale like leaves, not cones? Utah State says juniper plus redcedar have scale like leaves covering the twig.
Evergreen with no cones? CSU notes some evergreens are broadleaf.
Seeds on a stalk? That fits ginkgo per NC State.
Kind Seed Co shares these plant notes for growers of all kinds. For more on seeds see cannabis seed anatomy and cannabis leaf anatomy. Read growing cannabis near trees for site notes. See companion plants when growing marijuana for garden pairings.
Sources
- Tree and botanical glossary, Utah State University Extension Forestry
- Botany (CMG GardenNotes 120), Colorado State University Extension
- Ginkgo biloba (ginkgo), NC State Extension Gardener Plant Toolbox
FAQ
What is a cone bract?
CSU says gymnosperms produce seeds on the end of modified bracts such as pine cones.
Where are seeds on a cone?
Utah State says gymnosperm seeds form usually on the scales of a cone.
Which trees are conifers?
Utah State lists pines, firs, spruces, yews plus Douglas fir.
Are all conifers evergreen?
No. CSU says larch plus bald cypress are deciduous conifers.
Does ginkgo have cones?
NC State says male ginkgo trees make pollen cones while females bear ovules on stalks.
