Summary
Juglans hopeiensis (Chinese: 麻核桃), also known as Ma walnut,[2] is a species of walnut native to northern Hebei Province.[3] Some scholars believe that the species is a hybrid of Juglans regia and Juglans mandshurica.[4][1] Currently, it is a threatened tree species.[2]
| Juglans hopeiensis | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Juglandaceae |
| Genus: | Juglans |
| Species: | J. hopeiensis
|
| Binomial name | |
| Juglans hopeiensis | |
Historically, Ma walnut was originally distributed in the Northern Taihang Mountains of Hebei Province, so it was called Hebei walnut (河北核桃).[5] This species is mainly distributed in some mountainous areas of Hebei Province, Shanxi Province, Beijing and Tianjin in China.[6]
Morphological characteristics edit
Ma walnut, whose scientific name is Juglans hopeiensis Hu,[7] is a plant belonging to the genus Juglans of the family Juglandaceae. The plant can reach up to 2.5 meters high and often grow in high mountains. Its bark is gray-white with longitudinal cracks.[8]
Discovery and Naming edit
In 1930, Zhou Hanfan (周汉藩) discovered this new species in Banjiegou, Xiakou Village, Changping County, Hebei Province (now part of Beijing).[9] Subsequently, one strain of the species was found in each of Jixian, Mentougou, and Lianhua Mountain.[10]
In 1934, the new species was first described by the Chinese botanist Hu Xiansu (better known as H. H. Hu) in his paper entitled Notulae systematicae ad Florem Sinensium V. He originally indicated that the species was known locally as "Mahetao" (i.e. Ma walnut) and was once quite commonly cultivated, but it subsequently became less popular.[1]
In 1981, several plants of Ma walnut were found again in Bancheng District, Lishui County, Hebei Province.[10]
The name of the species was verified by AAS Systematic Botanist on October 15, 1998.[11]
References edit
- ^ a b c Xian-Yun Mu, Miao Sun, Pei-Fang Yang, and Qin-Wen Lin (Oct 9, 2017). "Unveiling the Identity of Wenwan Walnuts and Phylogenetic Relationships of Asian Juglans Species Using Restriction Site-Associated DNA-Sequencing". Frontiers in Plant Science. 8: 1708. doi:10.3389/fpls.2017.01708. PMC 5641410. PMID 29067029.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ a b Yiheng Hu, Meng Dang, Xiaojia Feng, Keith E Woeste, Peng Zhao (Feb 18, 2017). "Genetic diversity and population structure in the narrow endemic Chinese walnut Juglans hopeiensis Hu: implications for conservation". Tree Genetics & Genomes. 13 (4). doi:10.1007/s11295-017-1172-6. S2CID 22168198.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Jules Janick (2008). The Encyclopedia of Fruit and Nuts. CAB International. pp. 428–. ISBN 978-0-85199-638-7.
- ^ Shri Mohan Jain (1 March 2009). Breeding Plantation Tree Crops: Temperate Species. Springer Science & Business Media. pp. 257–. ISBN 978-0-387-71203-1.
- ^ "我国首个艺术核桃品种"艺核1号"在河北省问世". Ministry of Science and Technology. 2005-11-24.
- ^ "Studies on the Chemical Constituents and Bioactivities of Pericarps of Juglans Hopeiensis". CNKI. Retrieved August 4, 2020.
- ^ Te-tsun Yu (1982). China Fruit Tree Taxonomy. China Agriculture Press. pp. 267–.
- ^ Chinese Academy of Sciences of Editorial Committee of Flora of China (1979). Flora of China, Volume 21. Sciences Press.
- ^ Yu Dejun (1982). Taxonomy of China fruits. China Agriculture Press.
- ^ a b Hebei Forest Editorial Board (1988). Hebei Forest. China Forestry Publishing House. ISBN 9787503802171.
- ^ "Taxonomy - GRIN-Global Web v 1.10.6.2". National Plant Germplasm System. Retrieved August 5, 2020.
External links edit
- Diarylheptanoids from the fresh pericarps of Juglans hopeiensis.ScienceDirect, from Fitoterapia. Retrieved December 10, 2020.