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. Success in this endeavor relies heavily on the past work of taxonomists...

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. Robust automatic species identification algorithms using...

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. Although Cyanea is one of the most species-rich flowering plant genera in Hawai'i, nearly half of...

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 recommendations are meant to guide public...

The North American crop wild relatives (CWR) of lettuce (Lactuca L.) represent an underexplored
pool of genetic diversity of potential value to breeding programs.  In this review, we examine the role of herbarium and genebank holdings in...

Mulches provide many benefits for trees and shrubs. Properly applied mulch will moderate soil temperatures, reduce soil moisture loss, reduce soil compaction, provide nutrients, improve soil structure, foster beneficial microbial communities, and keep...

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
in knowledge of taxonomy, distributions, and...

The Hamamelidaceae has genera with named cultivars, but only one cultivar registration authority for the genus Hamamelis. Choosing the Hamamelidaceae as the focus of this project provides missing information for members of this ornamentally valuable...