1, Petunia is another Chinese name for Petunia, which is very common, for example, Hua Chonglou is also known as the seven leaves of a flower. It is the Solanaceae, so the name of Bidongjia is more appropriate, you should ask "why Bidongjia also known as Petunia", my guess is that because Bidongjia's flower shape is very much like a petunia, but also grow short, so called Petunia is more image, the Beijing Botanical Journal of Petunia as a Bidongjia's synonym. Baidu encyclopedia information is incomplete is a very common thing.

2, the eggplant family of the ovary skewed very well understood, you have seen the fruit of the eggplant, eggplant is not straight, but curved into a certain arc, cut open to look at the inside of the ovary is not located in the center of the, and leaning to the left or to the right. Pictures did not find, you can experience for yourself, buy an eggplant or pepper or tomato, cut across (cut off at the waist) to see if the ovary is not in the center.

3, a family because there are many kinds, can only use a model species to replace the flower pattern of the family, the picture in 5 is the flower pattern of eggplant, the flower axis is indicated by ●, the flower axis is drawn on the top of the flower pattern, the flower axis of the other side and the two sides of the drawing of the center of the crescent-shaped hollow arcs of a protruding (very compressed hollow triangles, under the bottom of the larger, the two sides of the smaller), in order to indicate the bracts and the two sides of the bracteoles (such as for the terminal flower, the ● and bracts and bracteoles need not be drawn). The various parts of the flower should be drawn between the rachis and the bracteoles; the calyx is represented by crescent-shaped arcs with protuberances and short lines, of which there are five in the drawing, and which are interconnected, indicating that the sepals are connate; the corolla is represented by a black solid arc, of which there are also five in the drawing and which are interconnected, indicating that the corollas are connate; and there are five little dots in the corolla, indicating five stamens, and which are glued to the corolla, indicating that the stamens are inserted on the corolla. In the center is the pistil, the pistil is represented by a cross-section of the ovary, the figure sees a circle of the outer envelope, the center of a slash, indicating that there are 2 carpels, a closer look at the slash is not divided equally between the circle, indicating that the ovary is oblique, the slash on both sides of the center of the white outwardly forming a protruding pattern, indicating that the median placentation and the ovule (which develops into a seed) a large number of as well as the mode of attachment.

The floral program is * K(5)C(5)A5 G (2:2:∞), with a short line under G. The flower is in the center of the slash. *: indicates that the flower is actinomorphic; K: calyx, 5, brackets indicate connate; C: corolla, 5, brackets indicate connate; A: stamens, 5; G: pistil, the short line below indicates that the ovary is superior, the first 2 indicates bicarpal, the second 2 indicates bicameral in the ovary, and the third ∞ indicates a majority of seeds, with brackets indicating that the two carpels are connate.