Effects of Evening Primrose Oleic Acid

Yellow evening primrose (Oenothera glazioviana Mich.) is an erect biennial to perennial herb of the Onagraceae family and the genus Oenothera with a strong taproot; the stem is 70-150 cm tall, 6-20 mm thick, without or with branches, often densely covered with soft curved hairs and sparsely extended hairs (the base of the hairs is bright red and blister-like), and short glandular hairs are often densely mixed at the upper ends of the stems and branches.

The basal leaves are rosulate, oblanceolate, with acute or slightly obtuse apex, gradually narrowed at the tip and extending downward to form wings, with continuous shallow wavy teeth on the edge from bottom to top, milky white or bright red, dark green to bright emerald green at the top, covered with curved soft hairs and many hairs on both sides; the stem leaves are spirally symbiotic, narrowly elliptic to lanceolate, narrowing from bottom to top. The seeds are rhombus-shaped, dark brown, angular, with uneven pits on each surface, and about half are aborted. The flowering period is from May to October, and the fruiting period is from August to December.

Shape characteristics of yellow evening primrose

An erect biennial to perennial herb with a robust taproot; stem 70-150 cm tall, 6-20 mm thick, unbranched or with branches, often densely covered with soft curved hairs and sparsely extended hairs (hair base bright red blister-like), often densely mixed with short glandular hairs at the upper ends of stems and branches.

The basal leaves are rosette-shaped, oblanceolate, 15-25 cm long and 4-5 cm wide, with an acute or slightly obtuse apex, gradually narrowing and extending downward to form a wing, with continuous shallow wavy teeth on the margins from bottom to top, 5-8 pairs of lateral veins, milky white or bright red, dark green to bright emerald green on the top, and covered with soft curved hairs and many hairs on both sides; the leaf stem is 3-4 cm long; the stem leaves are spirally symbiotic, narrowly elliptic to lanceolate, narrowing from bottom to top, 5-13 cm long and 2.5-3.5 cm wide, with an acute or slightly obtuse apex, a wedge-shaped apex, sparsely continuous teeth on the margins, 8-2 pairs of lateral veins, and the hairs are the same as those of the basal leaves; the leaf stem is 2-15 mm long, shortening upwards[2].

The inflorescence head is spike-shaped, growing on the top of the stems and branches, densely covered with soft curved hairs, many hairs and short glandular hairs; the bracts are ovate to lanceolate, sessile, 1-3.5 cm long, 5-12 mm wide, and covered with the same hairs as on the inflorescence head. The flower buds are cone-lanceolate, obliquely spreading, 2.5-4 cm long, 5-7 mm in diameter, and the top

With a beak about 6mm long; the diameter of the floral tube is 3.5-5cm, 1-1.3mm thick, sparsely covered with soft curved hairs, many hairs and glandular hairs; the calyx is light green, narrowly lanceolate, 3-4cm long, 5-6mm wide, caudate at the apex, close to each other, folded when in bloom, and the hairs are the same as those of the floral tube, but dense; the flowers are light yellow, broadly obovate, 4-5cm long, 4-5.2cm wide, with obtuse or slightly concave apex; the filaments are nearly equal in length, 1.8-2.5cm long; the anthers are 10-12mm long; about 50% of the bee pollen is developed; the ovary is emerald green, cylindrical, with 4 edges, 8-12mm long, 1.5-2mm in diameter, and the hairs are the same as those on the calyx; the style is 5-8cm long, and the part of the floral tube that protrudes outward is 2-3.5cm long; the anthers are protruding outward when the style is in bloom, and the lobes are 5-8mm long.

The capsule is conical-cylindrical, narrowing upwards, 2.5-3.5 cm long, 5-6 mm in diameter, with longitudinal ridges and bright red grooves, and the hairs are the same as those of the ovary, but more sparse. The seeds are rhombus-shaped, 1.3-2mm long, 1-1.5mm in diameter, dark brown, angular, with uneven pits on each mask, and about half are aborted. The flowering period is from May to October, and the fruiting period is from August to December.