The "kotha" plant, also known as kavath or wood apple, is a medium-sized tree with the scientific name Limonia acidissima. It is characterized by a hard, woody, and rough-textured fruit with a brownish, tangy, and aromatic pulp. The tree has sharp spines and its leaves, when crushed, emit a slightly lemon-like scent. 

Detailed Description:

Scientific Name: Limonia acidissima 

Common Name: Wood Apple, Kavath, Kotha 

Growth: The tree is slow-growing, erect, with upward-reaching branches. 

Bark: The bark is ridged, fissured, and scaly. 

Spines: Sharp spines are present on some twigs. 

Leaves: Deciduous, alternate, compound leaves with 4-7 leaflets. The leaflets are oval to elliptical, with serrated margins. 

Flowers: Small, greenish white to yellowish flowers. 

Fruit: Round to oval, with a hard, woody, grayish-white rind. The pulp is brown, mealy, odorous, and contains numerous small seeds. 

Fruit Pulp: The pulp is described as tangy, aromatic, and astringent. 

Habitat: Native to India and Ceylon, found in dry plains. 

Uses: The fruit is edible and has been used in traditional medicine for digestive issues and other ailments. The unripe fruit is also used to treat coughs. 

In the context of Ahmedabad (Sola), the kotha plant is likely the wood apple tree, known for its distinctive fruit and medicinal properties.