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 ULMUS CRASSIFOLIA POLLEN OR BETULA LENTA POLLEN OR ACER RUBRUM POLLEN OR PENICILLIUM CHRYSOGENUM "VAR." CHRYSOGENUM OR ASPERGILLUS NIGER "VAR." NIGER OR ARTEMISIA VULGARIS ROOT OR QUERCUS RUBRA POLLEN OR QUERCUS VIRGINIANA POLLEN OR CLADOSPORIUM SPHAEROSPERMUM OR AMARANTHUS RETROFLEXUS POLLEN OR ACER NEGUNDO POLLEN OR BLATTELLA GERMANICA OR IVA ANNUA POLLEN OR COCHLIOBOLUS SATIVUS OR RUMEX CRISPUS POLLEN OR "LOBSTER," UNSPECIFIED OR ALNUS RHOMBIFOLIA POLLEN OR CARYA ILLINOINENSIS POLLEN OR PLANTAGO LANCEOLATA POLLEN OR CRAB "LEG," UNSPECIFIED OR XANTHIUM STRUMARIUM POLLEN OR "OYSTER," UNSPECIFIED OR QUERCUS ALBA POLLEN OR CARYA OVATA POLLEN OR POPULUS ALBA POLLEN OR PLATANUS OCCIDENTALIS POLLEN OR PERIPLANETA AMERICANA OR CHENOPODIUM ALBUM POLLEN OR RUMEX ACETOSELLA POLLEN OR "SHRIMP," UNSPECIFIED OR FRAXINUS AMERICANA POLLEN OR ACER SACCHARUM POLLEN OR ALTERNARIA ALTERNATA did not return any results.

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