DENDROLOGY

Detailed explanation-1: -Citrus and Bougainvillea contain thorns that originate from the axillary bud of a stem that provides protection. Watermelon, cucumber, and pumpkin have modified axillary buds that form thin, wiry, leafless, and spirally coiled branches and it helps the weak plant to climb the support referred to as stem tendrils.

Detailed explanation-2: -Pisum and Lathyrus don’t show stem tendrils. Modified stems or leaves known as tendrils are seen in Vitis and passiflora.

Detailed explanation-3: -Final Answer: Prickly poppy is a plant without tendrils.

Detailed explanation-4: -Common examples of tendril-producing plants are the grape, members of the squash or melon family (Cucurbitaceae), the sweet pea (Lathyrus odoratus), and the passionflowers (Passiflora species).