online.wsj.com — Wine often reveals a cornucopia of flavors. Watching a connoisseur identify these may induce a few sniggers, but a fine wine can boast several competing aromas, all jostling for attention in the glass. These can range from fruit (apple, lychee and plum) and berry (blackberry, gooseberry), to floral (rose, violet) and plant (grass, tobacco), to spice (black pepper, licorice) or even vegetal (asparagus, green pepper).