No.19 Wen-Jing Xu, Wei-Hua Qin, Zi-Qi Wang, Zhong-Lin Li, Long-Fei Fu, Xin Hong

A new variety of Didymocarpus (Gesneriaceae) from Guangdong, China

PhytoKeys 128: 33–38

Abstract

  A new variety of Didymocarpus, D. heucherifolius var. gamosepalus from Guangdong, China, is described and illustrated with photographs. It closely resembles the more widespread D. heucherifolius within a number of morphological characters. However, it can be easily distinguished from the latter according to the new taxon: calyx base connate, 5-lobed from middle to above middle, larger flowers (up to 5 cm long) and glabrous corolla.

  Original link:https://phytokeys.pensoft.net/lib/ajax_srv/generate_pdf.php?document_id=35446&readonly_preview=1&file_id=0

Figure 1. Didymocarpus heucherifolius var. gamosepalus A habit B habitat, showing Danxia landscape C cyme with flowers D corolla, showing outside glabrous E bracts and bracteoles F calyx, showing base of calyx connate G opened corolla, showing staminodes H pistil I stigma J stamens.

FIGURE 2. The distribution areas of Section Heteroboea and their Parent material. The different colours represent the different Parent material: red – danxia landscape; yellow – granite landscape; green – karst limestone landscape; black – volcanic landscape).

FIGURE 3. Petrocodon longitubus Cong R.Li & Yang Luo (Photo by Hua Xie). (A) habitat, (B) mature plant, (C) adaxial surface of leaf blade, (D) abaxial surface of leaf blade, (E) calyx and disc, (F) front view of flower, (G) lateral view of flower, (H) young fruit, (I) pistil with calyx and disc, (J) opened corolla showing stamens and staminodes.

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