**Description:**
– Walnut family members have large aromatic leaves
– Leaves are usually alternate, but opposite in Alfaroa and Oreomunnea
– Leaves are pinnately compound or ternate, usually 20–100cm long
– Trees are wind-pollinated
– Flowers are usually arranged in catkins
**Taxonomy:**
– Living genera are grouped into subfamilies, tribes, and subtribes
– Subfamily Rhoipteleoideae includes Rhoiptelea
– Subfamily Engelhardioideae includes Alfaroa, Engelhardia, and Oreomunnea
– Subfamily Juglandoideae includes Platycarya and Juglans
– Tribes within Juglandoideae are Platycaryeae and Juglandeae
**References:**
– Angiosperm Phylogeny Group (2009) updated classification
– Juglandaceae family is recognized
– Germplasm Resources Information Network contains data
– The Encyclopedia of Seeds provides in-depth information
– Evolution and systematics of Juglandaceae are studied
**Botanical Characteristics:**
– Fruits are often confused with drupes
– The outer covering of the fruit is an involucre
– The fruit is a drupe-like nut
– Examples include Juglans regia and Platycarya strobilacea
– Seed catkins are present in Platycarya
**Evolutionary Insights:**
– Large-scale phylogenetic analyses reveal fagalean diversification
– Diversification was promoted by diaspores and environments in the Paleogene
– Studies on evolution, phylogeny, and systematics of Juglandaceae
– GRIN Genera of Juglandaceae provides valuable information
– Research by Xiang et al. (2014) highlights the interplay of diaspores and environments
The Juglandaceae are a plant family known as the walnut family. They are trees, or sometimes shrubs, in the order Fagales. Members of this family are native to the Americas, Eurasia, and Southeast Asia.
| Juglandaceae | |
|---|---|
| |
| Juglans regia | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Juglandaceae Augustin Pyramus Perleb fermium |
| Type genus | |
| Juglans | |
| Subfamilies | |
|
See text | |
| |
| The range of subfamily Engelhardioideae | |
| |
| The range of subfamily Juglandoideae | |
| Synonyms | |
| |
The nine or ten genera in the family have a total of around 50 species, and include the commercially important nut-producing trees walnut (Juglans), pecan (Carya illinoinensis), and hickory (Carya). The Persian walnut, Juglans regia, is one of the major nut crops of the world. Walnut, hickory, and gaulin are also valuable timber trees while pecan wood is also valued as cooking fuel.