Passion fruit (Passiflora) generally refers to egg fruit (Passiflora), and the morphological characteristics of fruit trees are as follows:

1. Herbaceous vines can't stand upright, but can only cling to other plants or supports (such as trees and walls), and grow upward by winding or climbing, about 6 meters long; Stems with fine stripes, glabrous.

2. The leaves are papery, 6-13 cm long and 8-13 cm wide, with a wedge-shaped or heart-shaped base, palmately 3-parted, the middle lobe oval, the lobes on both sides oval, and the lobes have pointed serrations at the edges, and there are 1-2 small cup-shaped glands near the curved base, which are hairless.

3. Cymes, the flowers first bloom from the innermost or central flower, then gradually open on both sides, and finally degenerate to only one flower, opposite to tendrils; Flowers are fragrant, about 4 cm in diameter; Pedicel 4-4.5 cm long; Bracts are green, broadly ovoid or rhombic, 1-1.2 cm long, and the edges are irregularly serrate; 5 sepals, green outside, green and white inside, 2.5-3 cm long, with a hornlike appendage at the top outside; 5 petals, equal to sepals;

The outer corona has 4-5 lobes, the outer 2 lobes are filiform, about the same length as the petals, the base is light green, the middle is purple, the top is white, and the inner 3 lobes are narrowly triangular, about 2 mm long; The inner corona is not pleated, the top is entire or irregularly torn, and the height is about 1-1.2 mm; Disk membranous, ca. 4 mm high; The gynoecium stalk is 1-1.2 cm long; 5 stamens, filaments separated, base connate, 5-6 mm long, flat; Anthers oblong, 5-6 mm long, yellowish green; Ovary obovoid, about 8 mm long, pubescent; 3 styles, flat rod, and the stigma is kidney-shaped.

4. Berries are ovoid, with a diameter of 3-4 cm, a longitudinal diameter of 5-7 cm, and a transverse diameter of 4-6 cm. They are hairless, purple when ripe, green when young, purple when ripe, and 6-12 g in single fruit weight, with tough shell and yellow pulp. Fruit leather is tough and smooth. The pulp is filled with yellow juice, which looks like raw egg yellow. The content of fruit juice is about 4%, and the juice yield is 28% to 33%.

Extended information:

Egg-fruit varieties are classified as follows:

1. Yellow Egg-fruit

Features: when ripe, the peel is bright yellow, the fruit shape is large, round and the star-shaped spots are obvious, and the average single fruit is 8-1g. The fruit juice content is high, up to 45%, and the pH is 2.3.

Advantages: Yellow egg fruit has vigorous growth, many flowers, high yield and strong disease resistance.

Disadvantages: Cross-pollination of different plants can bear fruit, and artificial pollination is needed to ensure the yield. Without cold tolerance, frost will kill you. With high acidity and light aroma, it is generally used as industrial raw materials and processed fruit juice, which is not suitable for fresh eating.

identification: the tendrils are purple, the stems are obviously purple, and the skin is yellow when the fruit is ripe.

2. Purple egg-shaped fruit

Features: the fruit shape is small, the egg-shaped and star-shaped spots are not obvious, the weight of a single fruit is 4-6g, and the fruit juice is fragrant and sweet, which is suitable for fresh eating, but the fruit juice content is low, with an average of 3%.

advantages: cold and heat resistance.

Disadvantages: weak disease resistance, weak growth and low yield.

identification: tendrils and twigs are green, without purple, and only the mature pericarp is purple or even purple-black.

3. Purple-red egg fruit

is a high-quality hybrid of yellow and purple egg fruit.

characteristics: purple peel, obvious star-shaped spots, large fruit shape, oblong shape, single fruit weighing 1-13 grams, strong cold and disease resistance, vigorous growth, self-pollination without artificial pollination. The content of fruit juice is as high as 4%, the color is orange yellow, the taste is very fragrant, and the sugar content is 21%, which is suitable for fresh eating and processing.

Baidu Encyclopedia-Egg Fruit (Passion Flower)