The Embryological Studies of Comastoma pulmonarium (Gentianaceae) Better than nothing: Evolution of autonomous selfing under strong inbreeding depression in an alpine annual from the Qinghai–Tibet Plateau Study on the Chemical Constituents of Comastoma pulmonarium (Turcz.) Toyohuni Xanthones of Comastoma pedunlulatum Reproductive allocation of three sympatric Comastoma(Gentianaceae)species Effects of the Position on Floral Traits and Reproductive Success of Comastoma pulmonarium (Gentianaceae)