cantaloupe fruit fruits melon muskmelon ripe rockmelon yellow agricultural agriculture appearance brown cream cucurbita cut firm food green grooves juicy moist open orange refreshing rind ripeness round scaly seeds seedy shape skin smooth surface taste tasy texture variations vine purple berry citrullus lanatus dark green elongated endocarp exocarp fleshy healthy mesocarp mottled nutritious pepo red sucrose sugars sweet water melon watermelon white