Evening primrose is a species under the genus Evening Primrose in the family Willowherbaceae, and is an annual plant in the north of China, while it is a biennial plant south of the Huaihe River. Evening primrose is a very important nutritional medicine discovered in this century, and it has significant curative effects on a wide range of human ailments.

Evening primrose

Evening primrose is an erect biennial rough herb, with a basal rosette of leaves close to the ground; the stems are 50 to 200 centimeters tall, unbranched or branched, and are curved pilose with spreading long hairs (the bases of the hairs are pustular), often mixed with glandular hairs at the upper ends of the stem branches.

Inflorescence spikelike, unbranched, or with secondary lateral inflorescences under the main inflorescence; bracts leaflike, as long as 1/2 as long as the flower in bud, elliptic-lanceolate when grown, becoming larger and smaller from the bottom upward, subsessile, 1.5-9 cm long, 0.5-2 cm wide, persistent when fruiting, buds conical-oblong, 1.5-2 cm long, 4-5 mm thick, with a beak of ca. 3 mm at the tip; floral tube long 2.5-3.5 cm, 1-1.2 mm in diameter, yellowish green or reddish when in flower, covered with mixed pilose, spreading long hairs and short glandular hairs; glabrescent after anthesis; sepals green, sometimes reddish, oblong-lanceolate, 1.8-2.2 cm, 4-5 mm wide proximally, apex cuspidate into a caudicle, 3-4 mm long, erect in bud, connivent to each other, reflexed from the base when in opening but upturned at the upturned at middle, indumentum identical to floral tube; petals yellow, sparsely yellowish, broadly obovate, 2.5-3 cm long, 2-2.8 cm wide, apex retuse; filaments subequal, 10-18 mm long; anthers 8-10 mm long, pollen ca. 50% developed; ovary green, terete, 4-angled, 1-1.2 cm long, 1.5-2.5 mm thick, densely covered with long, stretched hairs and short glandular hairs, sometimes mixed with curved pilose hairs; style green, terete, 4-angled, 1-1.2 cm long, 1.5-2.5 mm thick, densely covered with long hairs and short glandular hairs, sometimes with long hairs and short glandular hairs. densely covered with spreading long hairs and short glandular hairs, sometimes mixed with curved pilose hairs; the style is 3.5-5 cm long, the part extending out of the floral tube is 0.7-1.5 cm long; the stigma is surrounded by anthers. The pollen is pollinated directly on the stigma lobes at flowering, which are 3-5 mm long.

Chinese Name: Evening Primrose

Latin Name: Oenothera biennis L.

Alternative Names: Evening Primrose, To be Xiao Grass, Mountain Sesame, Wild Sesame

Another name: Evening Primrose, To be Xiao Grass, Mountain Sesame, Wild Sesame

< strong> Binomial: Oenothera biennis

Kingdom: Botany

Phylum: Angiospermae

Organism: Dicotyledons

Organism: Dicotyledons

Organism. Dicotyledoneae

Subclass: Subclass: Primitive Perianth Subclass Archichlamydeae

Order: Myrtiflorae

Willowherb Onagraceae

Genus: Evening primrose Oenothera

Place of Distribution: North and South America, Argentina, China

English Name: Evening Primrose strong>Evening primrose

Fruit and flower period: June to September

Flower language: silent love, beauty after the bath