New Taxa
The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)



No. 07 SHAO-JUN LINGFANG WEN & MING-XUN REN

 



Oreocharis hainanensis (Gesneriaceae), a new species from karst regions in

Hainan Island, South China

 


Phytotaxa 538 (4): 281291

 

 









 

ABSTRACT

 

Oreocharis hainanensis S.J.Ling & M.X.Ren, a new species of Gesneriaceae is described and illustrated from low-altitudual karst areas in Hainan Island, South China. The new species is easily distinguished from its closely-related O. jasminina S.J.Ling, F.Wen & M.X.Renby campanulate floral tube, zygomorphic corolla and exserted stamens. It also shows different habitats from the four currently-recognized Oreocharis taxa on the island. Molecular phylogeny analysis based on plastid trnL-trnF and nuclear ITS1/2 sequences supported the delimitation of the new species, which forms a monophyletic clade with all the other Oreocharis taxa from Hainan Island. The roles of habitat and floral isolation in the evolution of the new species and its affinities are discussed. The species was assessed as Vulnerable (VU C1 and D2) according to IUCN Red List Categories and Criteria.

Original article link:https://doi.org/10.11646/phytotaxa.538.4.2




The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)


FIGURE 1. Oreocharis hainanensis S.J.Ling & M.X. Ren sp. nov. A. Habitat; B. habit; C. adaxial leaf surface; D. abaxial leaf surface; E. lateral view of corolla, sepal and calyx; F. face view of corolla; G. opening flower showing stamens and staminode; H. pistil, stamens and staminode; I. capsule; J. fruit pods; K. seeds; L–N. Main floral visitors: L. Braunapis sp.; M. Apis sp.; N. Amegilla sp.; All photos by Shao-Jun Ling.

 




The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)

FIGURE 2. Oreocharis hainanensis S.J.Ling & M.X.Ren sp. nov. A. Habit; B. abaxial leaf surface; C. lateral view of corolla, sepal and calyx; D. front view of corolla; E. opening corolla showing stamens and staminode; F. pistil, stamens and staminode; G. capsule; H. seed. (Drawn by Shu-Ping Guan based on the holotype S.J.Ling 2020091701 in HUTB).





The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)


FIGURE 3. Molecular phylogeny of Hainan Oreocharis taxa and 57 Oreocharis species, based on the combined chloroplast gene trnL-trnF and nuclear ribosomal DNA (nrDNA) sequence ITS1/2 data matrices. Posterior probability (PP) and Bootstrap value (BS) are showed above branches (only shown if BS > 50%). Hainan Oreocharis taxa were showed in grey.






The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)



The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)



The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)



The recently published new taxa and new records of Gesneriaceae from China before 31 December 2022 (7)

FIGURE 4~7 Oreocharis hainanensis S.J.Ling & M.X. Ren (Photographer: Shao-Jun Ling)