The captivating "Lady Calophaca," formally known as Calophaca sinica, stands as a botanical wonder, enchanting landscapes with its distinct characteristics. Native to southern Shanxi and the southern Yinshan Mountains in Inner Mongolia, China, this shrub thrives in shaded valley slopes and mountain thickets at 900–1,800 meters altitude.

 

 

 

 

Growing 2–2.5 meters tall, the Lady Calophaca is an upright shrub with pale brown-white bark that peels gradually. Its pinnate leaves host 7–9 (occasionally 11) oval leaflets, 1.2–1.5 cm long, with heart-shaped bases. The upper leaflet surface is smooth, while the underside boasts a ghostly white hue dotted with sparse, delicate hairs. From May to June, short inflorescences bear 5–7 vibrant yellow flowers. The bell-shaped calyx (1.5–2 cm) is coated in white soft hairs and brown glandular hairs. Petals form a striking display: the round standard petal (2–2.5 cm) has a notched tip, while wing petals (2 cm) mirror this feature. Keel petals, equal in length, curve gently and fuse at the apex. The ovary is densely covered in white hairs, with a curved style bearing hairs at its upper part.

By late June to August, the plant produces 3–5 cm long, narrow pods with beak-shaped tips, covered in brown glandular and white soft hairs. Inside lie oval green seeds, vital for its reproduction. However, habitat destruction and overexploitation have pushed the Lady Calophaca to the brink. Listed as vulnerable in the China Biodiversity Red List (Higher Plants Volume) and protected as a second-class species in China’s National Key Protected Wild Plants List (2021 Edition), urgent conservation efforts aim to preserve this botanical treasure. Its survival hinges on safeguarding mountain ecosystems and curbing human encroachment, ensuring future generations can witness the elegance of Calophaca sinica.