Period of fertility lasts from four to six days. Calyx has no ridge or seam around the base, either falling away entirely or forming a persistent husk-like structure around the mature fruit. The capsule is borne on a short stalk in an erect, suberect, or nodding position. Fruit in most species have a mechanism to open spontaneously when ripe, and often split into definite sections. Fruit lacking any mechanism to split open when ripe.
Fruit is smooth and without spines.
Seeds usually possess a well-developed wart or protuberance at the point of attachment to the placenta via a threadlike tissue. Seeds lacking a protuberance at the point of attachment to the placenta.