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Strict Genus: Corylus

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Search by botanical or common name, genus, or family. SilvaGrid also recognizes many botanical synonyms and standard hybrid notation.

Name search: Use Botanical or Common Name to search a full botanical name such as Acer palmatum, a genus such as Acer, or a common name such as maple.
Synonyms: The same field recognizes many outdated or alternative botanical names and links them to their currently accepted taxa.
Hybrids and graft chimaeras: In the same field, you can type a standard 'x' in place of the botanical hybrid symbol (×). Use '+' when searching for graft chimaeras.
Family search: Use Botanical Family to explore taxa within a family such as Rosaceae.

1. Climate

About climate mapping

To make searching practical, SilvaGrid groups the bioclimatic zones from the World Checklist of Vascular Plants (WCVP) into five primary macro-climates:

Tropical: Equatorial and tropical zones defined by consistent year-round warmth. This encompasses the wet tropics, seasonally dry tropics, and cooler high-altitude montane tropics.
Subtropical: Warm transition zones between tropical and temperate regions, typically characterized by mild, largely frost-free winters. (Note: WCVP groups dry-summer Mediterranean climates within this broader biome).
Temperate: Mid-latitude climates defined by distinct seasonal shifts, including a true winter season where regular frosts and plant dormancy are expected.
Arid: Moisture-deficient climates—including true deserts and dry shrublands—where evaporation exceeds precipitation, requiring severe drought adaptations.
Cold: High-latitude subarctic or high-altitude subalpine climates defined by severe winters, prolonged freezing, and highly restricted growing seasons.

These categories describe a species' primary native environment and serve as a broad baseline for cultivation. While many plants can be successfully grown across multiple macroclimates—for example, some species mapped to the Tropical macroclimate can also be grown in temperate climates—others may have much narrower climatic requirements within their mapped macroclimate. Local factors such as frost hardiness, summer heat, rainfall and soil conditions should always be considered before planting.

2. Plant Types

About plant types

SilvaGrid Plant Types are practical horticultural and botanical groupings derived from WCVP life-form descriptions, taxonomy, or a combination of the two. Some correspond closely to established botanical groups, while others bring together plants with similar growth forms for practical discovery.

Trees: Woody plants with persistent above-ground stems, generally forming an elevated crown or canopy. Large herbaceous tree-like plants are excluded.
Shrubs: Woody or partly woody plants with a shrub or subshrub growth form, typically branching low rather than forming a single main trunk.
Climbers & Vines: Plants with a climbing growth habit, including herbaceous climbers and woody lianas that use other vegetation or structures for support.
Conifers: Gymnosperms from the major conifer families, including pines, cypresses, podocarps and their relatives, ranging from low shrubs to large trees.
Palms & Cycads: True palms from the Arecaceae family together with cycads. The two are not close botanical relatives, but are grouped here as a practical horticultural and landscape category.
Ferns: Vascular, spore-producing plants within the fern group, ranging from small ground-layer and epiphytic forms to large tree ferns.
Grasses, Sedges & Rushes: A practical group combining true grasses, sedges, rushes and restios. Bamboos are shown separately because of their distinctive growth form.
Bamboos: Members of the grass family, shown separately from other grasses because of their distinctive growth forms and horticultural use.
Herbaceous Perennials: Non-woody, multi-year plants, including evergreen tropical perennials and large herbaceous forms. Bulbs and other geophytes are shown separately.
Annuals & Biennials: Short-lived plants that complete their life cycle over one or two growing seasons.
Bulbs & Geophytes: Plants with underground storage organs such as bulbs, corms, tubers or rhizomes, allowing them to persist through seasonal dormancy.
Cacti & Succulents: Cacti and other succulent plants with fleshy or thickened tissues associated with water storage, spanning many unrelated botanical groups.
Aquatic & Pond Plants: Plants adapted to living in water or water-saturated soils, including submerged, floating and emergent forms.
Air Plants & Epiphytes: Epiphytic and lithophytic plants that grow on trees or rocks, including many plants commonly described as air plants.

3. Native range (WGSRPD)

Continent

Region

Botanical country

About WGSRPD mapping

SilvaGrid uses the World Geographical Scheme for Recording Plant Distributions (WGSRPD) to organise native plant distributions. WGSRPD is an international botanical standard maintained by Biodiversity Information Standards (TDWG) and is also used by the World Checklist of Vascular Plants (WCVP).

Botanical geography: SilvaGrid uses WGSRPD continents, regions and "botanical countries". These provide consistent units for recording plant distributions, but they do not always correspond exactly to modern political countries.
Consistent distribution data: Using the same geographic framework as WCVP allows SilvaGrid to preserve and compare native-range information consistently across the global plant dataset.

WGSRPD is a system for recording plant distributions rather than a climate, habitat or site-suitability classification.

Genus Corylus

View Botanical Profile & Insights

Widespread across Europe and natively found in North America, Temperate Asia, and Tropical Asia, the genus Corylus, a member of the Betulaceae family, is a group comprising 27 taxa. Members of this group are commonly associated with temperate climate conditions. It features a mix of trees and shrubs.

Data Profile

Taxonomic Scale: 27 taxa (17 base species, 10 variants).
Centers of Diversity: Temperate Asia (22), Europe (5), North America (5)
Primary Climates: Temperate (27)
Dominant Forms: Shrubs (24), Trees (8)

27 taxa found

Showing 27 (page 1 of 1)

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Corylus americana

— American Hazel, American Hazelnut Family: Betulaceae

Temperate Shrubs

Corylus avellana

— Barcelona Nuts, Cobnut Family: Betulaceae

Temperate Trees Shrubs

Corylus avellana var. avellana

Family: Betulaceae

Temperate Trees Shrubs

Corylus avellana var. pontica

— Mediterranean Hazel, Turkish Hazel Family: Betulaceae

Temperate Shrubs

Corylus chinensis

— Chinese Filbert, Chinese Hazel Family: Betulaceae

Temperate Shrubs

Corylus colchica

— Colchian Hazel Family: Betulaceae

Temperate Shrubs

Corylus colurna

— Byzantine Filbert, Constantinople Nut Family: Betulaceae

Temperate Trees

Corylus × colurnoides

Family: Betulaceae

Temperate Trees Shrubs

Corylus cornuta

— Beaked Filbert, Beaked Hazel Family: Betulaceae

Temperate Shrubs

Corylus cornuta subsp. californica

— California Hazel, California Hazelnut Family: Betulaceae

Temperate Shrubs

Corylus cornuta subsp. cornuta

— Beaked Filbert, Beaked Hazel Family: Betulaceae

Temperate Shrubs

Corylus fargesii

Family: Betulaceae

Temperate Trees

Corylus ferox

— Himalayan Hazel, Himalayan Hazelnut Family: Betulaceae

Temperate Shrubs

Corylus ferox var. ferox

— Himalayan Hazelnut Family: Betulaceae

Temperate Shrubs

Corylus ferox var. tibetica

— Tibetan Hazel Family: Betulaceae

Temperate Shrubs

Corylus heterophylla

— Asian Hazel, Siberian Filbert Family: Betulaceae

Temperate Shrubs

Corylus heterophylla var. heterophylla

Family: Betulaceae

Temperate Shrubs

Corylus heterophylla var. sutchuenensis

Family: Betulaceae

Temperate Shrubs

Corylus jacquemontii

— Indian Tree Hazel, Jacquemont's Hazel Family: Betulaceae

Temperate Trees

Corylus maxima

— Filbert, Giant Filbert Family: Betulaceae

Temperate Trees Shrubs

Corylus potaninii

Family: Betulaceae

Temperate Shrubs

Corylus sieboldiana

— Asian Beaked Hazel Family: Betulaceae

Temperate Shrubs

Corylus sieboldiana var. mandshurica

— Manchurian Filbert, Manchurian Hazel Family: Betulaceae

Temperate Trees Shrubs

Corylus sieboldiana var. sieboldiana

— Japanese Hazel, Siebold Filbert Family: Betulaceae

Temperate Shrubs

Corylus wangii

Family: Betulaceae

Temperate Shrubs

Corylus wulingensis

Family: Betulaceae

Temperate Shrubs

Corylus yunnanensis

— Yunnan Hazel Family: Betulaceae

Temperate Shrubs

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