Korea Flora: Deciduous shrub. Height 2-3m. Winter buds and branchlets similar to Weigela florida, with winter buds slightly curved inward. Leaves opposite, nearly sessile, spoon-shaped, spoon-shaped elliptical or broadly ovate, apex acuminate, base cuneate or rounded, size 1-7cm × 1-5cm. Both surfaces pubescent with spreading hairs on veins of lower surface, margin serrulate. Petiole 2-4mm long. Flowers in axillary clusters of 1-2, initially yellowish-green changing to pale red 3-4 days after blooming. Peduncles pubescent; calyx lobes linear, divided to base. Fruit and seeds with fine hairs, 10-15mm long.

Flowering period: Mid-Late April (Early May)
Fruiting period: Mid September-Mid October
Distribution: Korean endemic species. Mainly distributed south of Hwanghae-do and eastern Gangwon-do, also reported from North Pyeongan and North Hamgyeong Provinces

Ecological characteristics: Light-demanding species with very rapid initial growth. Often grows near hiking trail entrances.

Taxonomic notes: Weigela subsessilis flowers from mid-April to early May, while W. florida flowers from late April to mid-May (early June in Gangwon-do), with flowering periods slightly overlapping in late April to early May in regions like Gyeonggi-do. Due to this characteristic, natural hybrids between the species are occasionally observed. The "Gol-byeongkkot" mentioned by Lee (1980) is considered to be a hybrid between W. subsessilis and W. florida, different from the Japanese native W. hortensis (Siebold et Zucc.) K. Koch, and is found in the wild. It has red flowers like W. florida but deeply divided calyx like W. subsessilis. The leaves have scattered white hairs on the lower surface, and the corolla tube gradually widens, more closely resembling W. subsessilis. W. coraeensis Thunb., commonly cultivated in Japan and imported as an ornamental, has pink flowers, nearly glabrous leaves with glossy upper surfaces, and abruptly widened upper corolla tubes, sometimes leading to misidentification as W. florida.