Representative alpine plants from the Qinghai-Tibet Plateau. Top left, Spenceria ramalana Trim. (Rosaceae). Top right, Pomatosace filicula Maxim. (Primulaceae). Bottom left, Cyananthus formosus Diel. (Campanulaceae). Bottom right, Allium wallichii Kunth (Amaryllidaceae). Studies on phylogeography, cytology, and intraspecifi c differentiation of these plants are included in this special issue. Photographed by Hang SUN (top left), Bo XU (top right), and Yang NIU (bottom left and right). See details and studies on more alpine plants of the Qinghai-Tbet Plateau in this issue.left and right). See details and studies on more alpine plants of the Qinghai-Tbet Plateau in this issue. [Detail] ...