DENDROLOGY

Detailed explanation-1: -A flower that only has stamen or carpels is said to be “unisexual". The flowers of the cucumber plant are unisexual. Flowers of onion, pea and china rose plants are bisexual.

Detailed explanation-2: -Most cucumber varieties are monoecious with unisexual flowers-have separate male and female flowers within the same individual-and thus require animal pollination for reproduction.

Detailed explanation-3: -Cucurbit has unisexual flowers carrying either male or female reproductive organs. Flowers with male reproductive organs (stamen) are termed as staminate flowers. while those carrying only carpel, are termed as pistillate flowers. Other examples of unisexual flowers are papaya, watermelon, maize etc.

Detailed explanation-4: -Examples of bisexual flowers are-Rose, Lily, Tulip, Mustard, Tomato, Hibiscus, Country bean, Brinjal, Mango, and Sunflower. Self-pollination and cross can occur in a bisexual plant following the presence of male and female reproductive organs in a single flower.