Has it really been a year since we saw the last mulberries? For most of us in the lower 48, the mulberry is the first ripe berry of summer, but it's only here for a couple of weeks. There are three species you'll find scattered across the U.S.--the black mulberry (Morus nigra), the white mulberry (Morus alba), and the red mulberry (Morus rubra). The red species is native to North America, while the other two are native to southwestern Asia. You'll find these imports throughout the country, as they were brought here to create silk in the New World (silk worms live on mulberry leaves exclusively). We can't eat the leaves, but the ripe fruit is a great snack for humans, right off the tree. These blackberry-like morsels provide 60 calories per cup, with 85 percent of your daily requirement of Vitamin C and 14 percent of your daily Iron. Make sure they are ripe and sweet, because under-ripe mulberries can lead to serious reactions like vomiting, diarrhea, and hallucinations.