Plant Identification Techniques

Leaves - The size, shape, margin (edge), venation (vein pattern), and arrangement on the stem (alternate, opposite, or whorled) are important clues

Flowers and Fruit - The color, size, shape, scent, and number of petals can be decisive for identification. 

Stems and Branches - Note if the plant is herbaceous (soft, non-woody) or woody. For woody plants, the bark's texture, color, and pattern are useful. Stems can also be round, square, or triangular.

Other Features - The presence of hairs, thorns, or barbs can also be a distinguishing feature. 

Reference material: Introduction to Plant Morphology, MasterClass - How to Identify a Plant in 10 Steps