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.

The Systematics Collections Committee of the American Society of Plant Taxonomists has updated the recommendations on herbarium practices and ethics that were previously published by the Society in 1958 and 1973.

This Nomenclature Web Resource Guide was assembled by the Plant Nomenclature & Taxonomy Community.

This is a list of Online Resources for Nomenclatural Verification assembled by the Plant Nomenclature & Taxonomy Community.

This Online Herbaria Guide was assembled by the Plant Nomenclature & Taxonomy Community. It provides a list of herbaria for research purposes. 

The University of British Columbia Botanical Garden compiled a spreadsheet of Collectors' references and expedition abbreviations with associated information that were gathered from various sources (mostly online resources). The spreadsheet is shared th