Penstemon tubaeflorus Nutt.  
Family: Plantaginaceae
tube beard-tongue, tube penstemon, white wand beard-tongue
Penstemon tubaeflorus image
Dan Tenaglia  
Etymology: Penstemon: from the Greek pente, "five," and stemon, "stamen," for the fifth stamen, referring to the staminode, or just an allusion to the fact that it has five stamens
Plants: erect, perennial, 12"-40" tall forb, smooth below the inflorescence
Leaves: opposite, smooth
Flowers: white, 5-parted, 1/2"-1" long, tubular, lips similar, tube much longer than the lobes and flaring gradually toward the top, finely hairy inside and outside, 5 stamens (1 infertile); inflorescence a 4"-12" cylindrical, often interrupted, short-branched cluster; blooms May-June
Habitat: moist; prairies, woods
Penstemon tubaeflorus image
Penstemon tubaeflorus image
Dan Tenaglia  
Penstemon tubaeflorus image
from USDA Plants Website  
Penstemon tubaeflorus image
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