Daphniphyllum calycinum

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Daphniphyllum calycinum
牛耳楓 Daphniphyllum calycinum -香港青松觀 Tuen Mun, Hong Kong- (9227115971).jpg

Least Concern (IUCN 3.1)[1]
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Daphniphyllaceae
Genus: Daphniphyllum
Species:
D. calycinum
Binomial name
Daphniphyllum calycinum
Synonyms[2]
  • Daphniphyllum calleryanum Baill.
  • Daphniphyllum gaudichaudianum Baill.

Daphniphyllum calycinum is a species of shrubby plant in the family Daphniphyllaceae. It is found in northern Vietnam and Southeastern Zhōngguó/China. It is used in biodiesel and in lubrication, soap-making and Chinese medicine.

Taxonomy[]

The species is in section Lunata of Daphniphyllum, along with D. griffithianum and D. majus.[3]

"[T]he premier systematic botanist of the nineteenth century", George Bentham (1800-84), English, described this plant in 1861 in his publication Flora Hongkongensis; a description of the flowering plants and ferns of the island of Hongkong[4][5]

Description[]

This species grows as a shrub some 1-5-4m tall. The grayish-brown branches are sparsely lenticillate. The petioles are some 4 to 8cm long. The obovate to obovate-elliptic leaf blades are 12-16 by 4-9 cm in size, they are chartaceous, glaucous/hairy and are inconspicuously papillate on lower surface; broadly cuneate leaf base, slightly reflexed margins and obtuse to rounded apex, mucronate; 8-11 pairs of later veins are visible on upper surface, prominent on lower. Male flowers have an 8-10 cm pedicel and a discoid calyx with 3 or 4 broadly triangular lobes, 9 or 10 stamens some 3 mm long with very short filaments, oblong laterally-compressed anthers, connective exserted. Female flowers have a 5-6 mm pedicel, broadly-triangular calyx-loves about 1.5mm in size, ellipsoidal ovary 1.5-2 mm in size, very short style, 2 recurved stigmas. The Infructescence/fruiting head is some 4-5 cm in size, densely arranged with ovoid-ellipsoidal, tubercalate, glaucous drupes some 7 by 4 mm in size, with persistent calyx and style branches. Flowering occurs from April to June, while fruiting is from August to November.[6]

Distinguishing characteristics of this species are: the size (9-16 by 4-9 cm) and shape (obovate to obovate-elliptic) of the leaf blade, the obtuse to rounded apex; and size (about 7 mm), dense arrangement and glaucousness of the fruit.[7]

Distribution[]

The plant is native to an area from northern Vietnam to southeastern Zhōngguó/China (Fujian, Guangdong, Guangxi, Hong Kong, south Hunan, south Jiangxi).[2][6]

Habitat and ecology[]

The shrub grows in forests and thickets at altitudes of occasionally below 100m but mainly 200-700m.[6]

Daphniphyllum calycinum is present on the degraded hillside shrublands of Hong Kong, it is common there in scrubland and forest edges.[8][9] Birds disperse the dry-season fruiting seeds.

The follicular micromycete, or sac-fungi, , in the Mycosphaerellaceae family, uses this species as a host.[10]

Conservation[]

While this species has a very wide distribution with a large population, and it there are no current major or future significant threats identified, like most plant and ecosystems it is a continuing decline in area, extent and/or quality of habitat, and so is of conservation concern.[1]

Vernacular names[]

  • vai lá xoan ngược is a name used in Vietnam.[11]
  • 牛耳枫, niu er feng, or niu-er-fon, is a name used in Zhōngguó/China[6][12]

Uses[]

The seeds provide abundant oil that was used in lubrication and to make refined soap, however recently because of its toxicity it is only used in biodiesel.[6][12] Roots and leaves are used within Chinese medicine. The plant has many alkaloids and other active ingredients, see for example Wu et al., 2013.[12]

References[]

  1. ^ a b Wu, J.; Qin, h.; Botanic Gardens Conservation International (BGCI).; IUCN SSC Global Tree Specialist Group (2019). "Daphniphyllum calycinum". IUCN Red List of Threatened Species. 2019: e.T147379344A147619324. doi:10.2305/IUCN.UK.2019-2.RLTS.T147379344A147619324.en. Retrieved 20 November 2021.
  2. ^ a b "Daphniphyllum calycinum Benth". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 6 March 2021.
  3. ^ Tang, M.-S.; Yang, Y.-P.; Sheue, C.-R. (2009). "Comparative morphology on leaves of Daphniphyllum (Daphniphyllaceae)". Blumea. 54: 63–8. doi:10.3767/000651909X474104.
  4. ^ "Daphniphyllum calycinum Benth., Fl. Hongk. 316 (1861)". International Plant Name Index (IPNI). The Royal Botanic Gardens, Kew. Retrieved 6 March 2021.
  5. ^ Bentham, George (1861). Flora Hongkongensis; a description of the flowering plants and ferns of the island of Hongkong. Henrietta Street, Covent Garden, London: Lovell Reeve. Retrieved 6 March 2021.
  6. ^ a b c d e Min, Tianlu; Kubitzki, Klaus. "FOC: Family List: FOC Vol. 11: Daphniphyllaceae: Daphniphyllum: 7. Daphniphyllum calycinum Bentham, Fl. Hongk. 316. 1861". Flora of China. eFloras.org. Retrieved 6 March 2021.
  7. ^ Min, Tianlu; Kubitzki, Klaus. "FOC: Family List: FOC Vol. 11: Daphniphyllaceae: 1. Daphniphyllum Blume, Bijdr. 13: 1152. 1826". Flora of China. eFloras.org. Retrieved 6 March 2021.
  8. ^ Hau, Billy C.H.; Corlett, Richard T. (2002). "A survey of trees and shrubs on degraded hillsides in Hong Kong". Memoirs of the Hong Kong Natural History Society. 25: 84–94. Retrieved 6 March 2021.
  9. ^ Hau, Billy C.H.; So, Ken K.Y. (2003). 17 Using native tree species to restore degraded hillsides in Hong Kong, China. pp. 179–90. Retrieved 6 March 2021.
  10. ^ Braun, Uwe; Hönig, Lydia; Schwaß, Rowena (2016). "New records of foliicolous micromycetes from the Chinese Jiangxi Province". Schlechtendalia. 30: 1–7. Retrieved 6 March 2021.
  11. ^ Nguyễn Tiến Bân; with 19 others (2000). Tên cây rừng Việt Nam: Nhà xuất bản Nông nghiệp. p. 156. Retrieved 6 March 2021.
  12. ^ a b c Wu, Haifeng; and five others (2013). "Daphniphyllum Alkaloids: Recent Findings on Chemistry and Pharmacology" (PDF). Planta Med. 79 (17): 1589–1598. doi:10.1055/s-0033-1351024. PMID 24214836. Retrieved 6 March 2021.
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