Flower NameBlue star
Formal NameTweedia caerulea
Alias瑠璃唐綿, Blue star, Southern star, Tweedia, Blue milkweed
HabitatSouth America from Southern Brazil to Uruguay
MorphHalf of vines grass green for many years
Blue star（scientific name: Oxypetalum coeruleum） is a semi - vermicious evergreen perennial of the genus Opetarumum of the family Apocynaceae native to South America from Southern Brazil to Uruguay. It grows on sunny vacant lots and riverbeds. Pure hair grows on the stem, and it looks whitish. Leaves are elliptical with a base of heart shape, and leaves are opposite. For a long period from spring to fall, a small group of small sky-colored five-valve flowers will bloom from the axils in small groups. Flower color changes to sky blue, deep blue, pink color, purple, with time, and it will wither. The diameter of the corolla is about 3 cm and there is a secondary corolla, the stamens in the center of the flower popping out. Milky white liquid that comes out when cut is toxic and irritating. Applications are cut flowers, potted flowers, bouquets.
Generic name: Blue star, Scientific name: Oxypetalum caeruleum, Synonyms: Tweedia caeruleaaka, aka: Blue star, Ruri-touwata (Japanese), Southern star, Tweedia, Blue milkweed, original place: South America from Southern Brazil to Uruguay, Environment: sunny vacant lots, riverbeds, life style: semi-vermiform evergreen perennials, plant height: 40 to 100 cm, leaf shape : Long-ellipsoidal shape of the mind shape at the base, leaf order: virgin, number of petals: 5, flower diameter: 2 to 3 cm, there is a secondary corolla at the flower center. Flowering period: April to October, flower color: sky blue · deep blue · pink · purple, fruit type: fruit, use: cut flower, pot flower, engagement bouquet, note: poison to anther and stigma.
Flower typeActinomorphic Flower
Flowering placePot flower Ct flower・Flower arrangement
ColorPink, Blue, Violet
SeasonApr May Jun Jul Aug Sep Oct
Height40 ~ 100 [cm]
Diameter2 ~ 3