At this time, WBA does not accept credit cards. Samples submitted via cooperative agreement require advance written letter, a signed agreement by both parties, or purchase order indicating what samples are to be supplied with agreed upon time table for collection and costs. Upon shipping samples we submit an invoice. Payment is expected within 30 days after receipt of invoice. For samples in stock, we request payment before shipment.
Payment is by check, money order, or by electronic transfer of funds.
Much of the research and development associated with this web site has been funded by private parties. Choose from our inventory , or submit a request for new samples. These are the least expensive. All available species and plant parts within a specified geographic region are obtained without consideration to taxonomy. Costs for new samples vary according to weight or volume, and further depend on number ordered, whether obtained by cooperative agreement, or by purchase order.