Nephrite such as Lantian, Shaanxi, were also in great demand). There, white and greenish nephrite jade is found in small quarries and as pebbles and boulders in the rivers flowing from the Kuen-Lun mountain range northward into the Takla-Makan desert area. River jade collection was concentrated in the Yarkand, and the White Jade (Yurungkash) and Black Jade (Karakash) Rivers in Khotan. From the Kingdom of Khotan, on the southern leg of the Silk Road, yearly tribute payments consisting of the most precious white jade were made to the Chinese imperial court and there transformed into "objets d'art" by skilled artisans, as
Ornamental grass long lasting, often remaining well into the winter. Some "Stipa" species flower in the spring, the inflorescence standing almost two metres above the clumps of leaves, and again the seed heads last late into the winter. When gardening near natural wildland-urban interfaces, care to avoid invasive species, such as "Cortaderia jubata", "Pennisetum setaceum", and "Nassella tenuissima" (syn. "Stipa tenuissima"), is responsible horticulture. Ornamental grass Ornamental grasses are grasses grown as ornamental plants. They have become increasingly popular in gardens in recent years. Ornamental grasses are popular in many colder hardiness zones for their resilience to cold temperatures and aesthetic value