The Wild Flowers of Semiarid to Semimoist Valley Region

At the middle and lower reaches of Yaluzangbu, the transitional positions between semiarid zone and semihumid zone, the elevation of 2800～3300m, there are scrubs, woodlands, mesophilous coniferous forests and deciduous broadleaved forests. The elegant Tibetan-endemic flowers such as Paeonia ludlowii and Iris latistyla are distributed from forests to valley terraces, with the tolerance to drought and the tendency to warm. Besides these two, is the list of other major species: Clematis gracilifolia, white flowered; Arisaema flavum, yellow; Cynoglossum amabile, blue; Hypericum hookerianum, yellow; Cotoneaster microphyllus, white flowered and red fruited; Codonopsis convolvulacea, bluish purple; Desmodiunm elegans, reddish purple; Ceratostigma minus, blue; Spiraea canescens, white; and many species of Rosa.