ystemma短瓣花属14SH11Brachytome短萼齿木属7a42Brandisia来江藤属71310Brasania莼属1(3,9)11Brassaiopsis罗伞属7c2020Brassica芸薹属10(12)ia构属7e(→6)84Brucea鸦胆子属482Bruguieria木榄属464Bruinsmia岐序野茉莉属721Brylkinia扁穗茅属14SJ11Bryocarpum长果报春属14SH11Bryophyllum落地生根属2(6)201Buchanania山檨子属5254Buchnera黑草属2((4,3)1001Buckleya米面蓊属942Buddleja醉鱼草属2(7,14)210020Bulbophyllum石豆花属2(6)100101Bulbostylis球柱草属21003Bulleyia蜂腰兰属14SH(15)11Bunias匙荠属10(12)62Buphthalmum牛眼菊属(10)21Bupleurum柴胡属819064Burmannia水玉簪属2(9,3)609Burretiodendron柄翅果属7262Butea紫矿属7a22Butomus花蔺属8(9-10)11Buxus黄杨属845028Byttneria刺果藤属2703Cabomba竹节水松属9(3)51Cachrys绵果芹属(12)41Caesalpinia云实属2(8-4)15017Cajanus木豆属6378Caladium五彩芋属(3)71Calamagrostis拂子草属823010Calamintha新风轮属1071Calamus省藤属7a-c40054Calanthe虾脊兰属2(3)15054Calathodes鸡爪草属14SH34Calcareoboea朱红苣苔属1511Caldesia泽薹草属442Calendula金盏花属12121Calla水芋属811