For more than two centuries, biodiversity collections have served as the foundation for scientific investigation of and education about life on Earth. The collections that have been assembled in

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

This is an example from Denver Botanic Gardens of a Material Transfer Agreement:
Living Collections Access and Distribution Form. 

Orchid viruses are capable of causing flower deformities and death, which can severely
impact the horticultural industry and wild orchid conservation. Here we show

Oaks are critical to the health and function of forest and shrubland habitats in the United States, but many native oaks are threatened with extinction in the wild.

The U.S. national heritage of approximately one billion biodiversity specimens, once
digitized, can be linked to emerging digital data sources to form an information-rich network

Herbarium specimens are increasingly recognized as an important resource for conservation

Major international herbaria, natural history museums and universities have recently begun to digitise their collections to facilitate studies and improve access to collections.

1. There is an urgent need for large-scale botanical data to improve our understanding
of community assembly, coexistence, biogeography, evolution, and many other

In a pollen supplementation experiment, fruit or seed production by flowers exposed to natural pollination is compared to that following hand pollination either by pollen supplementation (i.e.