When blooming, pollen shed is considered a concern in pollinosis.
Bloodleaf is a perennial herb that spreads by rhizomes. It is .5 to 1.5 meters tall and the leaves are opposite, thin, ovate and narrow at the base. The flowers are silvery white and release large amounts of pollen. It grows in low wet woods, thickets and along streams.
Pollen grains in the Amaranthaceae family are spheroidal and polyporate, with roughly 20 pores. The pores are in luminoid areas being separated by densely granular luminoid ridges.
The grains are between 14-17 micrometers in diameter.
The shaded areas on the map indicates where the genus has been observed in the United States.
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