Botryosicyos

Hsu, K. - M., Tsai, J. - L., Chen, M. - Y., Ku, H. - M. & Liu, S. - C., 2013, Molecular phylogeny of Dioscorea (Dioscoreaceae) in East and Southeast Asia, Blumea 58 (1), pp. 21-27 : 26

The Botryosicyos and Lasiophyton clades

These two sections show many morphological characters in common including perennial crown with annual tubers, left-twining, usually pubescent and spiny, compound leaves and capsules that are longer than their wide. Prain & Burkill (1936) have combined these two sections and treated the members of D. sect. Botryosicyos within D. sect. Lasiophyton . However, these two sections show clear morphological differences to each other, such as the variations in leaflet venation, male bracts, and stamen number. Thus, the obtained phylogenetic relationships seem to be well-supported by morphological characters. As shown in Fig. 1 , D. sect. Botryosicyos and D. sect. Lasiophyton were both identified in the tree as well-supported clades within the compound-leaved clade ( Fig. 1 node 27 and 32). The members of D. sect. Botryosicyos , characterized by one main vein per leaflet, were sister to those of D. sect. Lasiophyton , which had several veins per leaflet.

Figures

Fig. 1 Bayesian tree of Dioscorea specimens reconstructed with combined chloroplast genome trnL-F, matK, rbcL and atpB-rbcL DNA sequences. Statisti- cal supports for each node (node numbers on the branches of the tree) in NJ, MP and BI analyses is shown in the table on the left. An asterisk (*) indicates a node value <50 %.