Cyananthus flavus - Yellow Trailing Bellflower

Yellow Trailing Bellflower is a Himalayan wildflower, with flowers various light shades of yellow or white. Flowers are borne singly at branch-ends, subtended by a whorl-like aggregation of 4 or 5 leaves. Flower-stalks are 1-2 cm, usually hairless, rarely sparsely hairy. Calyx is hairless, except yellow hairy inside sepals; tube broadly cylindrical, 8-12 mm, base rounded or flat, enlarging in fruit. Sepals are triangular, 3-4 x about 3 mm. Flower are 2.5-3 cm, outside hairless, inside densely white- or yellow hairy at throat. Petals are obovate-oblong or obovate-elliptic, 14-16 x 5-7 mm, tip often very sparsely brown hairy. It is a plant with roots carrot-shaped, up to 5 mm in diameter. Caudexes robust, multibranched, covered with persistent scales toward tip; scales ovate, about 3 × 1 mm. Stems are ascending, 5.5-16 cm, simple or with short branches, densely white hairy to nearly hairless. Leaves are alternate, gradually increasing in size toward tip, stalkless or nearly so; blade elliptic, obovate-lanceshaped, or broadly ovate, 5-16 × 3-8 mm, both surfaces gray-white hairy or hairless, base wedge-shaped, margin entire or sometimes slightly wavy, slightly recurved, tip pointed, blunt, or rounded. Capsules are nearly equal to calyx in length; style exceeding flower tube. Yellow Trailing Bellflower is found in Eastern Himalayas, in Arunachal Pradesh and Yunnan, China, at altitudes of 2700-3600 m. Flowering: July-August.