Synopsis and lectotypification of Distimake rhyncorhiza (Dalzell) Simões & Staples (Convolvulaceae): a little known species from the Western Ghats (India)

Abstract

We present a synopsis of a rare and little-known species of Distimake from Western India: a complete morphological description based on recent collections is provided, and nomenclature and typification issues are resolved. The fruit and seeds are described for the first time. With new morphological evidence and a full characterization of D. rhyncorhiza, the present study corroborates its placement in Distimake and supports its identity as a distinct species. The conservation status is assessed as Endangered but its distribution range is not yet fully documented and this assessment might be reviewed if more collections are made.

A Bird’s Eye View of the Systematics of Convolvulaceae: Novel Insights From Nuclear Genomic Data

“…The first family level phylogeny was produced based on plastid markers ( rbcL , atpB , psbE-J operon, and trnL-trnF intron/spacer), sampling 52 of the 60 genera recognized at the time ( Stefanović et al, 2002 ). Although the number of genera is currently the same, since this study there have been systematic changes, whereby some genera were synonymized with others, and new ones described (e.g., Staples, 2006 ; Buril et al, 2013 , 2015 ; Simões and Staples, 2017 ; Petrongari et al, 2018 ; Simões and More, 2018 ; Simões et al, 2020 ; Staples et al, 2020 ) ( Supplementary Table 1 ).…”

“…The first family level phylogeny was produced based on plastid markers (rbcL, atpB, psbE-J operon, and trnL-trnF intron/spacer), sampling 52 of the 60 genera recognized at the time (Stefanović et al, 2002). Although the number of genera is currently the same, since this study there have been systematic changes, whereby some genera were synonymized with others, and new ones described (e.g., Staples, 2006;Buril et al, 2013Buril et al, , 2015Simões and Staples, 2017;Petrongari et al, 2018;Simões and More, 2018;Simões et al, 2020;Staples et al, 2020) (Supplementary Table 1). Stefanović et al (2002) were the first to demonstrate the monophyly of Convolvulaceae, as well as of its three subfamilies as recognized at the time -Convolvuloideae, Humbertioideae, and Cuscutoideae -while exposing the non-monophyly of several tribes and genera across the family.…”