Botanical name: Catharanthus pusillus Family: Apocynaceae (Oleander family)
Synonyms: Lochnera pusilla, Vinca pusilla
Tiny Periwinkle is a small erect annual herb, native to India. It grows up to only 10 to 20 cm tall. It has several quadrangular branches, spreading from the base. Leaves are oppositely arranged, lance-shaped, 3-8 cm long, with rough margin. The leaf base narrows to a tiny stalk. The whole plant contains milky sap. Small white, periwinkle like flowers appear singly or in pairs, in the upper leaf axils. Flowers are tiny, 6-8 mm, flat, with 5 petals. Seed pod is very slender, 3-5 cm long, straight, pointed. Flowering: July-August.
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The flower labeled Tiny Periwinkle is ...