Berkana is the letter B
Anglo-Saxon Rune Poem (from ragweedforge.com)
The birch bears no fruit; yet without seed it brings forth suckers,
for it is generated from its leaves. Splendid are its branches and gloriously adornedits lofty crown which reaches to the skies.
Berkana reversed signfies a lack or great slowing down of growth, nurturing influence and feminine presence. Perhaps a recent injury is being slow to heal and recover. You might find that feminine might be less present in your life, or their influence is not as pronounced as normal. You might find that instead of being nurtured, you need to reach out and nurture people instead. This might be difficult for you, but it’s time has come to return the favors given to you.