Dehaasia
| Dehaasia | |
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| Trees with the white bark in Taiping (Malaysia) | |
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| Genus: | Dehaasia |
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see text | |
Dehaasia is a genus of evergreen or deciduous trees or shrubs belonging to the Laurel family, Lauraceae, with 53 species.[citation needed] native to continental Asia, from India to China, and islands of Borneo, New Guinea, and Indonesia.
They are hermaphroditic shrubs, or trees of medium size up to 5 m tall.[1] in tropical montane forest, lowland rainforest,[2] subtropical coastal lowland rainforest, Cloud forest, and Laurel forest. About 38[3] species accepted in Cambodia, China, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam, with the center of diversity in west Malaysia; three species in China, two endemic.[4] Alseodaphne, Dehaasia and Nothaphoebe are, morphologically, three closely related but different genera in a subgroup near to Persea genus.
The leaves are bright green to dark green, shiny and alternate.[5][6] The leaves are oblong to lanceolate to almost elliptical, acuminate and slightly cut at the base. The leaves are leathery in texture, glossy on both sides, dark green on the upper face more intense, sometimes with small blisters on the underside.
The trunk is rough and irregular, covered usually with a paper bark whitish or gray, smooth and easy to peel , with the xylem yellow. Some species with multiple stems or trunks strongly branched from the base. The young branches are slender, angular, with smooth integument, with visible signs of scars and sometimes reddish areas of recent growth.
The branchlets yellow-white at first, but a little gray later, thin, glabrous, warty, lenticellate with distinctive leaf scars, the young more or less angled.
The sheets are grouped at the apex of the twig: The inflorescences in tassels arm, generally thin with many bracts with few flowers, usually upright and branched at right angles.[7][8] Dehaasia species have "perfect bisexual flowers" possessing both male and female parts.
The oblong berries, hard or fleshy are conformed to attract animals and frequently the berries are brightly colored with sometimes besides a thickened strikingly colored stem at the junction of the peduncle part with the fruit. The fruit is black-dark and shiny, generally scarlet but sometimes yellow or green.[9] Usually ovoid, rarely globose with an exocarp fleshy and meaty. Some species have a red or scarlet dome.[10] Seed dispersal of Dehaasia species is due to vertebrates mostly. They are eaten by frugivorous bats and birds, and others as columbiformes and they are also consumed by several insects as ants.
Selected species
Some names in the repository Global Names Index of uBio:[11]
- Dehaasia acuminata Koord. & Valeton
- Dehaasia annamensis Kosterm.
- Dehaasia assamica Kosterm.
- Dehaasia borneensis Fern.-Vill.
- Dehaasia brachybotrys (Merr.) Kosterm.
- Dehaasia Blume, 1837.
- Dehaasia caesia Blume.
- Dehaasia cairocan (Vidal) C.K. Allen.
- Dehaasia candolleana (Meisn.) Kosterm.
- Dehaasia celebica Kosterm.
- Dehaasia chatacea
- Dehaasia corynantha Kosterm.
- Dehaasia cuneata
References
- ^ http://flora.huh.harvard.edu/china/PDF/PDF07/Dehaasia.pdf
- ^ http://www.wildsidephotography.ca/gallery/Database/26000_G
- ^ http://www.theplantlist.org/browse/A/Lauraceae/Dehaasia/
- ^ http://flora.huh.harvard.edu/china/PDF/PDF07/Dehaasia.pdf
- ^ http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=109471
- ^ http://www.efloras.org/object_page.aspx?object_id=112365&flora_id=2
- ^ http://flora.huh.harvard.edu/china/pdf/pdf07/Dehaasia.pdf
- ^ http://www.efloras.org/object_page.aspx?object_id=112365&flora_id=2
- ^ http://131.230.176.4/cgi-bin/dol/dol_terminal.pl?taxon_name=Dehaasia_cairocan&rank=binomial
- ^ http://www.phytoimages.siu.edu/imgs/pelserpb/r/Lauraceae_Dehaasia_cairocan_24856.html
- ^ "Global Names Index". Gni.globalnames.org. Retrieved 2011-11-11.
External links
- Dehaasia en eFlora
- A synopsis of the genus Dehaasia Bl. (Lauraceae)
- Chemical constituents from Dehaasia triandra. 1. Three new alkaloids, isocorydione, norisocorydione, and dehatriphine, from the leaves
- Chemical constituents from Dehaasia triandra. II. Five new alkaloids, secoxanthoplanine, dehydroisocorydione, 11, 8′-O-bisisocorydine,(8, 8′-R)-and (8, 8′-S)