A male catkin on a willow

Male catkins on a Common Hazel in January before opening

Catkins, or aments, are slim, cylindrical flower clusters, wind-pollinated and without petals, that can be found in many plant families, including Betulaceae, Fagaceae, Moraceae, and Salicaceae. They contain unisexual flowers. Often one plant has only male catkins, while another has female, but it is also possible for a plant to contain both male and female catkins. an ament inflorescence created by me. ... an ament inflorescence created by me. ... Species About 350, including: Salix acutifolia- Violet Willow Salix alaxensis- Alaska Willow Salix alba- White Willow Salix alpina- Alpine Willow Salix amygdaloides- Peachleaf Willow Salix arbuscula- Mountain Willow Salix arbusculoides- Littletree Willow Salix arctica- Arctic Willow Salix atrocinerea Salix aurita- Eared Willow Salix babylonica- Peking Willow Salix barrattiana- Barratts... Binomial name Corylus avellana L. Male catkins on Common Hazel The Common Hazel (Corylus avellana) is a shrub native to Europe and Asia. ... Wind is the roughly horizontal movement of air (as opposed to an air current) caused by uneven heating of the Earths surface. ... Honeybee and bumblebee pollinating a Sedum telephium Pollination is an important step in the reproduction of seed plants: the transfer of pollen grains (male gametes) to the plant carpel, the structure that contains the ovule (female gamete). ... Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern... Genera Alnus - Alder Betula - Birch Carpinus - Hornbeam Corylus - Hazel Ostrya - Hop-hornbeam Ostryopsis - Hazel-hornbeam Betulaceae, or the Birch Family, includes six genera of deciduous nut-bearing trees and shrubs, including the birches, alders, hazels, hornbeams and hop-hornbeams. ... Genera Castanea - Chestnuts Castanopsis Chrysolepis - Golden chinkapin Colombobalanus Fagus - Beeches Formanodendron Lithocarpus - Stone oaks Nothofagus - Southern beeches Quercus - Oaks Trigonobalanus The family Fagaceae, or beech family, is characterized by alternate leaves with pinnate venation, flowers in the form of catkins, and fruit in the form of nuts, one to seven... Genera Antiaris Artocarpus - Breadfruit, Jackfruit Brosimum Broussonetia - Paper Mulberry Castilloa Cecropia Chlorophora Dorstenia Ficus - Fig, Banyan Maclura - Osage-orange Morus - Mulberry Musanga Pseudolmedia Streblus Treculia The flowering plant family Moraceae (Mulberry family) comprises some 40 genera and over 1000 species of plants widespread in tropical and subtropical regions, less common... Genera Populus - the poplars Salix - the willows The Salicaceae are a family of trees, containing only two genera, Salix and Populus. ...