Amentotaxus×hybridia (Taxaceae), a new natural Amentotaxus hybrid from southeast Yunnan province, China

During floristic surveys of Taxaceae in Hekou County, Yunnan Province, China, a putative natural hybrid between A.yunnanensis H.L. Li and A.hekouensis L.M. Gao was collected. Morphological and molecular evidence confirms its status as a natural hybrid. Amentotaxus×hybridia L.M. Gao has linear or linear-lanceolate leaves 6-13 cm × 1.0-1.5 cm, white stomatal bands with 34-40 rows on abaxial side, 2.5-3.5 mm, slightly wider than leaf margins; 3-6 seeds borne at the base of the branchlet, peduncle 1.3-1.6 cm long with 3-4 rows of persistent basal bracts.

A natural hybrid of Sindora (Fabaceae, Detarioideae) from Singapore

Sindora×changiensis L.M.Choo, Loo, W.F.Ang & K.Er is a new hybrid from the subfamily Detarioideae in Fabaceae. This is the first reported instance of natural hybridisation in Sindora. Based on population genetics analyses using ddRAD and morphological observations, this taxon represents a fertile hybrid between Sindoracoriacea and Sindoraechinocalyx. This new hybrid is so far only known to occur naturally from Changi at the north-eastern coast of Singapore. It has pods that are sparsely spiny. This is intermediate between the smooth, non-spiny pods of S.coriacea, and the densely spiny pods of S.echinocalyx. The calyx is smooth and unarmed, resembling S.coriacea. Last but not least, the ovary is entirely pubescent, different from S.coriacea and S.echinocalyx. The ovary of S.coriacea has a glabrous patch in the middle, while that of S.echinocalyx has minute spines protruding from the dense pubescence. A taxonomic description and an updated key to the Sindora of Singapore and Peninsular Malaysia are also provided.

Two new hybrids of the genus Diplazium (Athyriaceae) from Japan

In this study, we describe the ferns Diplazium × kanayamaense hyb. nov. and D. × tsukushiense hyb. nov. and further compare them to parental species D. chinense, D. deciduum and D. fauriei in terms of morphological characteristics, plastids and nuclear DNA markers. These new hybrids have been determined to be endemic to western Japan. The International Union for Conservation of Nature and Natural Resources status was evaluated for D. × kanayamaense as endangered (EN) and D. × tsukushiense as critically endangered (CR).

Deparia × nanakuraensis K.Hori (Athyriaceae), a new hybrid pteridophyte from Japan

I describe Deparia × nanakuraensishyb. nov. and discuss differences in morphological characteristics between parental species D. pterorachis and D. viridifrons with chromosome counting, plastid, and nuclear DNA markers. The new hybrid is endemic to the eastern and northern parts of Japan. Based on the criteria of the International Union for Conservation of Nature and Natural Resources, this new species is here considered Data Deficient. The ploidy level is diploid sterile.

Description of a new natural Sonneratia hybrid from Hainan Island, China

Here, we describe, illustrate and compare a new natural hybrid, Sonneratia × zhongcairongii Y. S. Wang & S. H. Shi (Sonneratiaceae), with its possible parent species. Based on its morphological characteristics and habitat conditions, this taxon is considered to represent a sterile hybrid between S. alba and S. apetala. In China, the new hybrid is only reported in the mangrove forest in Dongzhai Harbour, Hainan Island. It has intermediate characteristics with its parents by elliptical leaf blades, peltate stigma, terminal or axillary inflorescence with 1-3 flower dichasia, cup - shaped calyx (4-6 calyx lobes) and no petals. We also provide a key for the identification of Sonneratia species.

Description of a new natural Sonneratia hybrid from Hainan Island, China

Here, we describe, illustrate and compare a new natural hybrid, Sonneratia × zhongcairongii Y. S. Wang & S. H. Shi (Sonneratiaceae), with its possible parent species. Based on its morphological characteristics and habitat conditions, this taxon is considered to represent a sterile hybrid between S. alba and S. apetala. In China, the new hybrid is only reported in the mangrove forest in Dongzhai Harbour, Hainan Island. It has intermediate characteristics with its parents by elliptical leaf blades, peltate stigma, terminal or axillary inflorescence with 1-3 flower dichasia, cup - shaped calyx (4-6 calyx lobes) and no petals. We also provide a key for the identification of Sonneratia species.