Isotrema jinquanii, a new species of Aristolochiaceae from limestone areas in Guangxi, China is described and illustrated now. This new species is most similar to I. sinoburmanicum in the shape of perianth. The morphological differences from the latter by the stem densely golden-tomentose at young twigs and densely brown-tomentose when aged, the petiole 1.5–3.1 cm long, densely golden (brown)-tomentose, the leaf blade 5.2–10.8 × 2.3–4.4 cm, densely golden (brown)-tomentose abaxially, the bracteole triangular, ca. 1.5 × 1 mm, the perianth outside densely brown-villous, the throat constricted, densely warty inside.

Primulina pingguoensis H.S. Ma & B. Pan, a new species of Gesneriaceae from Guangxi Zhuang Autonomous Region, China, is illustrated and described here. The new species morphologically resembles Primulina carinata Y.G. Wei, F. Wen & H.Z. Lü, but it differs from the latter by leaf blade elliptic to broadly ovate, 6.5–9.5 × 4.5–6.5 cm (vs. broadly elliptic to ovate, 4.0–5.0 × 3.0–4.0 cm), leaf blade base slightly oblique, cuneate (vs. rounded), leaf blade carnose (vs. subcoriaceous), corolla pinkish purple to pink (vs.purple or purplish red), corolla tube tubular, ventrally carinate, (vs. narrowly funnelform, strongly carinate, forming a clear keel), staminodes 2 (vs. 3). etc. The conservation status of P. pingguoensis is considered as ‘Critically Endangered’ (CR) according to the IUCN red list categories and criteria.