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Primulina diffusa (Gesneriaceae), a New Species Endemic to the Karst Limestone Area in Southwestern Guangxi, China

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Primulina diffusa Xin Hong, Fang Wen & S. B. Zhou (Gesneriaceae), a new species growing in rocky crevices at the foot of a limestone hill near the Sino-Vietnamese border in southwestern Guangxi, China, is described and illustrated. It is morphologically similar to P. hochiensis and P. hochiensis var. rosulata, but can be distinguished by having single-flowered cymes; short peduncle (1-1.5 cm long); narrowly elliptical to subulate bracts, 2-2.5 x ca. 0.6 mm; 1-2 cm long pedicel ; calyx lobes that are densely puberulent on both sides; and filaments that are geniculate near the middle.
... cm) and flowers with broadly infundibuliform (versus campanulate) corollas and purplish glandular-pubescent (versus villous) filaments (Wood 1972), and from P. diffusa by having 3 (versus 2) slightly purplish glandular-pubescent (versus glabrous) staminodes. Besides, Primulina elegans flowers in May to June, while the other two species flowers in October to December (Wood 1972, Zhou et al. 2014. A detailed comparison of the three species is summarized in Table 1. ...
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Primulina elegans (Gesneriaceae), a new species from Vietnam is described. This species is similar to P. gemella and P. diffusa in having stolons and papillose‐hispid leaves, but is easily distinguished from them by having 9–15 cymes and corollas with two brown stripes on the adaxial lip and nine purplish lines on the abaxial lip. Furthermore, Primulina elegans differs from P. gemmella by its broadly infundibuliform corollas with purplish glandular pubescent filaments, and from P. diffusa by having three slightly purplish glandular pubescent staminodes.
... In October 2013, during a field investigation in Jiangxi Province, we found some special plants of Primulina that are endemic to the Danxia landform and flower late in the season. After comparing with relevant literature (Wang 1981b, Wei et al. 2010, Weber et al. 2011, Li et al. 2012, Hong et al. 2014, Zhou et al. 2014, Li and Yu 2015, we confirmed that we had found an undescribed species, as described and illustrated below. Weber, but differs by entire leaf blade margin, narrowly ovate bracts, reddish-purple or bluish-purple corolla, 3.0-3.4 ...
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Primulina suichuanensis X. L. Yu & J. J. Zhou, a new species of Gesneriaceae from Jiangxi, China, is described and illustrated. Morphologically, the new species is most similar to P. roseoalba, but differs by entire leaf blade margin, narrowly ovate bracts, reddish–purple or bluish–purple corolla, 3.0–3.4 cm long corolla tube, white filaments, and 3.6 cm long pistil. It flowers from September to November.
... The shape of the corolla tube (inflated in the middle, contracted near the mouth) is unusual in this genus, which can be readily distinguished from other species in Northern and Northwestern Guangdong. After consulting the local Flora and relevant literature (Wang et al., 1990(Wang et al., ,1998Li and Wang, 2004;Wei et al., 2010;Hong et al., 2012;Chung et al., 2013;Liang et al., 2013;Lu et al., 2013;Ning et al., 2013;Xu et al., 2013;Zhao et al., 2013;Li et al., 2014;Wen and Wei, 2014;Zheng and Deng, 2014;Zhou et al., 2014) and herbarium specimens deposited at ANU, BJFU, CDBI, CTC, GH, HN, IBK, IBSC, KUN, NU, PH, PE, US and VMN, we identified the collected specimens as a new species, Primulina lechangensis. The new species is described and illustrated along with its distribution map. ...
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... As a result of further exploring and study, some of these special and unique habitats are now better understood (Xu 2007). Many new taxa of Primulina have been reported in recent years, such as P. bullata S. N. Lu & Fang Wen (Lu & al. 2013) Lü (Wen & al. 2014), P. crassirhizoma F. Wen, Bo Zhao & Xin Hong (Zhao & al. 2013), P. diffusa X. Hong, F. Wen, & S. B. Zhou ( Zhou & al. 2014), P. leprosa & al. 2010, under Chirita;), P. ningmingensis Wu & al. 2011, under Chirita; and P. sinovietnamica W. H. Wu & Q. Zhang (Wu & al. 2012). ...
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... Based on comparisons with the relevant literature (Wang et al. 1990, 1998, Li and Wang 2004, Wei 2010, Weber et al . 2013) and descriptions of some recently published species (Cai et al. 2013, Chung et al. 2013, Jiang and Li 2013, Lu et al. 2013, Ning et al. 2013, Li et al. 2014, Liang et al. 2014, Wen and Wei 2014, Zheng et al. 2014, Zhou et al. 2014), we concluded that it was indeed an hitherto undescribed species. Xu & K.F. ...
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