Bottle gourd (lauki) is an example of  [[1]] category of plants.

Plants with weak stems that cannot stand upright but take support and climb up are called Climbers. Bougainvillea and bottle gourd (lauki) are two examples of Climbers. These plants have specialized structures, such as tendrils or aerial roots, that help them to cling to nearby objects and grow vertically. 

Climbers are commonly used in gardening and landscaping to add vertical interest and provide a natural look to fences, walls, and other structures.