The hazelnut is the fruit of the hazel tree and therefore includes any of the nuts deriving from species of the genus Corylus, especially the nuts of the species Corylus avellana. They are also known as cobnuts or filberts according to species.
Hazels are plants of the genus Corylus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed in the birch family Betulaceae, though some botanists split the hazels into a separate family Corylaceae. The fruit of the hazel is the hazelnut.
Corylus avellana, the common hazel, is a species of flowering plant in the birch family Betulaceae, native to Europe and Western Asia. It is an important component of the hedgerows that were, historically, used as property and field boundaries in lowland England. The wood was traditionally grown as coppice, with the poles cut being used for wattle-and-daub building, and agricultural fencing.
Corylus maxima, the filbert, is a species of hazel in the birch family Betulaceae, native to southeastern Europe and southwestern Asia, from the Balkans to Ordu in Turkey.
A catkin or ament is a slim, cylindrical flower cluster, with inconspicuous or no petals, usually wind-pollinated (anemophilous) but sometimes insect-pollinated. They contain many, usually unisexual flowers, arranged closely along a central stem that is often drooping. They are found in many plant families, including Betulaceae, Fagaceae, Moraceae, and Salicaceae.
Corylus colurna, the Turkish hazel or Turkish filbert, is a deciduous tree native to southeast Europe and southwest Asia, from the Balkans through northern Turkey to northern Iran.
Corylus cornuta, the beaked hazelnut, is a deciduous shrubby hazel with two subspecies found throughout most of North America.
Pucciniastrum coryli is a fungal plant pathogen infecting hazelnuts. It forms ochraceous rust pustules on the leaves. Also commonly known as hazel rust.
Corylus americana, the American hazelnut or American hazel, is a species of deciduous shrub in the genus Corylus, native to the eastern and central United States and extreme southern parts of eastern and central Canada.
Corylus colchica, also known as Corylus iberica, is a species of hazelnut endemic to Armenia and Georgia in the Caucasus region. It can tolerate more frost than many others of its genus. It produces small edible nuts in September. It is not commercially grown for food because the nuts are small in size. The nut's shell is oval and the nut is round. The tree is sometimes crossed with the common hazel to make a hybrid that can grow in colder climates.
Acronicta falcula, the corylus dagger moth, is a moth of the family Noctuidae. The species was first described by Augustus Radcliffe Grote in 1877. It is found in the United States and Canada from southern New England to southern Manitoba and Iowa. Recently seen from Wisconsin, Connecticut, Rhode Island, New York and Michigan. It is reported as rare in Ohio. It is listed as a species of special concern in the US state of Connecticut.
Stigmella floslactella is a moth of the family Nepticulidae. It is found in all of Europe, except the Balkan Peninsula and the Mediterranean islands.
Park End Wood is a Site of Special Scientific Interest in the Teesdale district of west County Durham, England. The site occupies a low hill of Whin Sill on the southern edge of the River Tees floodplain just over 2 km upstream from the village of Middleton-in-Teesdale. It adjoins the Upper Teesdale SSSI to the south, and the Middle Crossthwaite and Stonygill Meadows SSSIs are nearby.
Slitt Woods is a Site of Special Scientific Interest in the Wear Valley district of County Durham, England. It occupies the valley of Middlehope Burn, a tributary of the River Wear, which it joins at Westgate, just south of the site.
Phyllonorycter coryli, or nut leaf blister moth, is a moth of the family Gracillariidae. It is found most of Europe, except the Balkan Peninsula.
Phyllonorycter nicellii is a moth of the family Gracillariidae. It is found in most of Europe, except the Balkan Peninsula and the Mediterranean islands.
Parornix devoniella is a moth of the family Gracillariidae. It is known from all of Europe.
Phyllonorycter japonica is a moth of the family Gracillariidae. It is known from Japan and the Russian Far East.
Argyresthia ivella is a moth of the family Yponomeutidae. It is found in most of Europe, except Ireland, the Netherlands, the Iberian Peninsula, Finland, Italy, Slovakia and most of the Balkan Peninsula.
Parachronistis albiceps, the wood groundling, is a moth of the family Gelechiidae. It is found in most of Europe, except the Iberian Peninsula and part of the Balkan Peninsula. Outside of Europe, it is found in southern Siberia, the Russian Far East and Korea.
