Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Your search for BETULA LENTA POLLEN OR ULMUS CRASSIFOLIA POLLEN OR ACER RUBRUM POLLEN OR SALIX NIGRA BARK OR TARAXACUM OFFICINALE POLLEN OR AMBROSIA ARTEMISIIFOLIA POLLEN OR AMARANTHUS RETROFLEXUS POLLEN OR BETULA POPULIFOLIA POLLEN OR GALLUS GALLUS FEATHER OR QUERCUS RUBRA POLLEN OR QUERCUS VIRGINIANA POLLEN OR ACER NEGUNDO POLLEN OR BLATTELLA GERMANICA OR "FLOUNDER," UNSPECIFIED OR IVA ANNUA POLLEN OR ATLANTIC HALIBUT OR PLANTAGO LANCEOLATA POLLEN OR ALNUS RHOMBIFOLIA POLLEN OR CARYA ILLINOINENSIS POLLEN OR XANTHIUM STRUMARIUM "VAR." CANADENSE POLLEN OR BETULA NIGRA POLLEN OR ANSER ANSER FEATHER OR XANTHIUM STRUMARIUM POLLEN OR CULEX PIPIENS OR URTICA DIOICA POLLEN OR CHENOPODIUM ALBUM POLLEN OR CARYA OVATA POLLEN OR QUERCUS ALBA POLLEN OR POPULUS ALBA POLLEN OR PLATANUS OCCIDENTALIS POLLEN OR PERIPLANETA AMERICANA OR "COD," UNSPECIFIED OR FRAXINUS AMERICANA POLLEN OR ACER SACCHARUM POLLEN OR ANAS PLATYRHYNCHOS FEATHER OR PACIFIC HALIBUT did not return any results.

Your search may be too specific. Try using fewer or broader search words.