Aristolochia bhamoensis sp. nov. (Aristolochiaceae) and a diagnostic key to all known A. subgen. Siphisia species from Myanmar

Abstract

Aristolochia bhamoensis from Myanmar is here described and illustrated. This new species is morphologically similar to A. faviogonzalezii (confined to northern Vietnam) and A. cathcartii (growing in the Himalayan region) but is distinguished from the latter two species by having a cream‐white upper part of the perianth tube, with visible purple ridges, a trumpet‐shaped limb, 5.0–5.5 cm diameter, inner surface of limb lobes densely covered with dark‐purple bristles, a nearly circular mouth, 3.2–3.5 cm wide, upper half of throat being dark‐purple to blackish, without striations or dots, and lower half purple, with conspicuous white striation. Morphological characters such as a 3‐lobed gynostemium and a 3‐lobed limb support a placement of the new species in the subgenus Siphisia. A diagnostic key is provided to the seven Siphisia species known from Myanmar.

Isotrema putalengense, a new species of Aristolochiaceae from northern Vietnam and two new combinations in Isotrema

“…To date, more than one hundred Isotrema species have been reported, including those named under Aristolochia (e.g., Liu and Deng 2009;Xu et al 2011;Yao 2012;Huang et al 2013;Wu et al 2013;Do et al 2014;Lu and Wang 2014;Nguyen et al 2014;Ohi-Toma et al 2014;Huang et al 2015;Wu et al 2015;Zhu et al 2015;Do et al 2016;Do et al 2017;Zhu et al 2018;Zhou et al 2019;Zhu et al 2019a;Cai et al 2020a, b;Do et al 2021). Prior to this paper, 18 Isotrema species have been recorded for Vietnam (Lecomte 1909;Schmidt 1935;Pham-hoang 2000;Do et al 2014;Do et al 2015a, b;Do et al 2016;Do et al 2017;Do and Li 2018;Lai et al 2019;Do et al 2021).…”