Corylopsis
Corylopsis is a genus of 25 species of shrubs in the witch hazel family, Hamamelidaceae, native to eastern Asia with the majority of species endemic to China but with some also in Japan, Korea, and the Himalayas. This genus is also known from the extinct species Corylopsis reedae described from Eocene leaf fossils found in Washington State, USA.
They grow to tall, often with a crown wider than the shrub's height. The leaves are ovate with an acute apex and a serrated margin, long and broad. The flowers are produced in late winter in pendulous racemes long with 5-30 flowers; each flower has five pale yellow petals, 4–9 mm long. The fruit is a dry capsule 10–12 mm long, containing two glossy black seeds.
Species
25 species are accepted.- Corylopsis alnifolia – China
- Corylopsis brevistyla – China
- Corylopsis calcicola – China
- Corylopsis coreana – central and southern Korea
- Corylopsis glabrescens – Japan
- Corylopsis glandulifera – China
- Corylopsis glaucescens – China
- Corylopsis gotoana – Japan
- Corylopsis henryi – China
- Corylopsis himalayana – Himalaya
- Corylopsis microcarpa – China
- Corylopsis multiflora – China and Taiwan
- Corylopsis obovata – China
- Corylopsis omeiensis – China
- Corylopsis pauciflora – Korea, Japan, and Taiwan
- Corylopsis platypetala – China
- Corylopsis reedae – extinct, Ypresian, Washington State
- Corylopsis rotundifolia – China
- Corylopsis sinensis – southern China
- Corylopsis spicata – Japan
- Corylopsis trabeculosa – China
- Corylopsis veitchiana – China
- Corylopsis velutina – China
- Corylopsis willmottiae – China
- Corylopsis yui – China
- Corylopsis yunnanensis – China