Hydrangea aspera ssp. sargentiana is a subspecies of the Hydrangea aspera plant, which belongs to the Hydrangeaceae family. It is native to the Himalayan region, specifically in Bhutan, China, and India, where it grows in forests and on mountain slopes at elevations of 2,400 to 3,300 meters.
This plant is a deciduous shrub that can reach up to 4 meters in height and 3 meters in width. It has large, rough, and hairy leaves that are 20-30 cm long and 10-20 cm wide. The leaves are green on the upper surface and grayish-white on the underside, with prominent veins.
The flowers of Hydrangea aspera ssp. sargentiana are large and showy, with a diameter of 10-20 cm. They are composed of many small flowers that are densely packed together and have a unique appearance due to the long, prominent stamens. The color of the flowers can vary from white to pink, purple, or blue, depending on the acidity of the soil.
This plant is often grown as an ornamental shrub in gardens and parks due to its attractive foliage and flowers. It prefers moist, well-drained soil and partial shade, and it can tolerate temperatures down to -10°C.
Hydrangea aspera ssp. sargentiana is also used in traditional medicine in some parts of its native range. The leaves and stems are believed to have analgesic and anti-inflammatory properties and are used to treat various ailments, including rheumatism, fever, and headaches.