Hens can grow beards and even spurs. Right now I have one bearded Narr. hen and two eastern wild hens with spurs on each leg. The older hen is going on 4 years and her spurs are about 1/2 in long. The envy of all the Jakes!
Don't worry about the hen beards, most of the time they wear down or are picked off anyhow. Also, it doesn't mean the're infertile either. My bearded Narr. hen has been a great layer and setter of her own eggs and has shown no fertility problems. Same with the spurred hens.
On a side note, a wild eastern gobbler's beard grows an average of 3-4 inches a year. My Jakes have 2-4 inch beards, the two year olds are between 6 and 8 and my oldest 4 year gobbler has a 10 inch. They rarely get over 12 since the end is usually worn off from dragging on the ground while feeding.