Mountain little sunflower 
Mouse-eared Hawkweed 
Munnozia senecionidis 
Musk thistle 
Narrow-leaf Trigger Plant 
Narrow-leaved Ragwort 
Nettle-leaved Bellflower 
New England Aster 
New Mexico thistle 
New York Aster 
New York Ironweed 
Nodding beggarticks 
Nodeweed 
Northern Bog Aster 
Northern Seaside Goldenrod 
Olearia ilicifolia 
Olearia lirata 
Olympic Mountain Aster 
Onopordum alexandrinum 
Onopordum ambiguum 
Onopordum anisacanthum 
Onopordum blancheanum 
Onopordum cynarocephalum 
Onopordum macrocephalum