The Neotropics are the most species-rich area of the planet. Understanding the origin and maintenance of this diversity is an important goal of ecology and evolutionary biology.

Plant biodiversity is threatened, yet many species remain undescribed. It is estimated that >50% of undescribed species have already been collected and are awaiting discovery in herbaria.

This is a guide to writing plant names developed for use at The Arboretum at Penn State.

The Checklist is a listing of published names of cultivated magnolias in PDF format.  This new listing is the result of years of effort by Magnolia Society International (MSI) member volunteers. This document serves as a checklist of Magnolia cultivars

With 90% of its nearly 1,400 native plants classified as endemic, Hawai'i has one of the highest levels of endemism of any floristic region of the world.

The purpose of these guidelines is to provide a consistent methodology for public garden staff to develop and categorize a list of cultivated taxa observed escaping from their locations of cultivation.

The North American crop wild relatives (CWR) of lettuce (Lactuca L.) represent an underexplored

Mulches provide many benefits for trees and shrubs.

Crop wild relatives, the wild progenitors and closely related cousins of cultivated plant
species, are sources of valuable genetic resources for crop improvement. Persisting gaps

The Hamamelidaceae has genera with named cultivars, but only one cultivar registration authority for the genus Hamamelis.