Packera antennarifolia–Shale Barren Ragwort Packera antennarifolia–Shale barren Ragwort Packera antennarifolia–Shale barren Ragwort Botanical Family Asteraceae Bloom Time April – May Pollen Characteristics Dispersal Unit Monad Aperture Number 3 Aperture Type Compound Ornamentation Echinate Tectum Eutectate Size (um) 27 Shape Round Share this:TwitterFacebookLike this:Like Loading...