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. 2020 Aug 26:157:217-226.
doi: 10.3897/phytokeys.157.54697. eCollection 2020.

Two new taxa of Gesneriaceae in the karst regions in North Vietnam

Wen-Hong Chen  1   2 , Shi-Wei Guo  1   3   2 , Hieu Quang Nguyen  4 , Li Chen  1   5 , Yu-Min Shui  1   2
Affiliations

Two new taxa of Gesneriaceae in the karst regions in North Vietnam

Wen-Hong Chen et al. PhytoKeys. .

Abstract

One new species and one new variety of Gesneriaceae in Vietnam are described, viz. Paraboea sinensis var. glabrissimavar. nov. and Primulina xuansonensis sp. nov. These two new taxa grow in limestone regions in North Vietnam. The former new variety differs from Paraboea sinensis (Oliv.) Burtt var. sinensis in its young leaf abaxially, stem and peduncle sparsely and thin pannose, acute top of leaves, pistil glandular-pubescent or pubescent. The latter new species differs in its bracts 1.6-2.5 × 1.3-1.5 cm, corolla 3-3.5 cm long, corolla tube slightly curved near the base and inflated on the adaxial surface near the corolla lobes, and corolla abaxial lip lobes rounded. The two new taxa grow at Xuan Son National Natural Reserve, North Vietnam and remain undisturbed with low risk of extinction.

Keywords: Didymocarpoideae; Flora of Vietnam; limestone; natural park; new taxa; protection.

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Figures

Figure 1.
Figure 1.
The distribution of Paraboea sinensis var. glabrissima W.H.Chen & Y.M.Shui var. nov. (triangle) and Primulina xuansonensis W.H. Chen & Y.M. Shui sp. nov. (square).
Figure 2.
Figure 2.
Paraboea sinensis var. glabrissima W.H.Chen & Y.M.Shui, var. nov. (A–F) and P. sinensis (Oliv.) Burtt var. sinensis (G & H) A habit, arrows indicate the young leaves with thin brown pannose B inflorescence with twisted fruits, arrows showing the indumentum of abaxial surface of leaf (pe = peduncle, abl = abaxial leaf) C face view of flower D dorsal view of the calyx, the arrow showing the coherent position E birds-eye view of opened corolla F stamens and staminodes, arrows showing the staminodes G habitat H inflorescence.
Figure 3.
Figure 3.
Primulina xuansonensis W.H.Chen & Y.M.Shui, sp. nov. (A–H) and its similar species P. lungzhouensis (W.T.Wang) Mich.Möller & A.Weber (I–J) A habit B view of adaxial leaf C inflorescence D bracts E face view of flower F lateral view of flower G birds-eye view of the opened corolla, arrow showing the staminodes (sta.) H pistil and calyx, arrow showing the disc ring I habitat of P. lungzhouensisJ face view of flower and bracts.
See this image and copyright information in PMC

References

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