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| Torreya dapanshanica X.F.Jin, Y.F.Lu & Zi L.Chen, in Lu, Chen, He, Liu, Wang, Chen et Jin, 2022. |
Abstract
Torreya dapanshanica X.F.Jin, Y.F.Lu & Zi L.Chen, a new species endemic to central Zhejiang, East China, is described and illustrated. This new species is most similar to T. jiulongshanensis (Z.Y.Li, Z.C.Tang & N.Kang) C.C.Pan, J.L.Liu & X.F.Jin, but differs in having leaves with an acuminate apex (vs. leaves with an acute apex), broadly ovoid-globose or globose seeds (vs. obovoid to narrowly obovoid seeds), slightly emarginate at the apex and obtuse-rounded at the base (vs. both acute at the apex and base), testa with irregular shallow grooves (vs. testa smooth or sometimes slightly concave). The diagnostic characters are critically compared and an IUCN assessment for the risk to the new species is estimated.
Keywords: Gymnosperm, new species, Torreya dapanshanica, Zhejiang
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| Torreya dapanshanica sp. nov. A branch with seeds B leaf (abaxial surface) C branch with pollen cones D microsporophyll/stamen (abaxial surface with four pollen sacs) E microsporophyll/stamen (adaxial surface) F branch with ovules G ovule (showing macrosporophyll and bracts) H seeds without aril I cross section of seed (showing deeply ruminate megagametophyte) (drawn by Xiao-Feng Jin; based on Xiao-Feng Jin 4036B, ZM). |
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| Photographs of Torreya dapanshanica sp. nov. A branch with seeds B branch with pollen cones C branch with pollen cones D pollen cone showing pollen sacs E ovule (fertilized) F fertilized ovule with bracts G seeds with arils H cross section of seed (showing aril) I seeds without aril J cross section of seed (showing deeply ruminate megagametophyte). |
Torreya dapanshanica X.F.Jin, Y.F.Lu & Zi L.Chen, sp. nov.
Latin diagnosis: Species nova haec T. jiulongshanensi (Z.Y.Li et al.) C.C.Pan et al. affinis est, sed a qua foliis apice acuminatis, basi cuneatis, seminibus late ovoideo-globosis vel globosis, basi obtusis, testis irregulariter et vadose canaliculatis differt.
Distribution and habitat: This new species is known only from Mount Dapanshan of Pan’an County, central Zhejiang. It grows at a single location on a forested slope by a stream margin at an elevation of 420‒485 m.
Etymology: The specific epithet ‘dapanshanica’ refers to the type locality of the new species.
Yi-Fei Lu, Zi-Lin Chen, An-Guo He, Ju-Lian Liu, Pan Wang, Wei-Jie Chen and Xiao-Feng Jin. 2022. Torreya dapanshanica (Taxaceae), A New Species of Gymnosperm from Zhejiang, East China. PhytoKeys. 192: 29-36. DOI: 10.3897/phytokeys.192.79506
